This shows all the functions supported by the system, and custom functions
Array
(
    [internal] => Array
        (
            [0] => zend_version
            [1] => func_num_args
            [2] => func_get_arg
            [3] => func_get_args
            [4] => strlen
            [5] => strcmp
            [6] => strncmp
            [7] => strcasecmp
            [8] => strncasecmp
            [9] => each
            [10] => error_reporting
            [11] => define
            [12] => defined
            [13] => get_class
            [14] => get_called_class
            [15] => get_parent_class
            [16] => method_exists
            [17] => property_exists
            [18] => class_exists
            [19] => interface_exists
            [20] => function_exists
            [21] => class_alias
            [22] => get_included_files
            [23] => get_required_files
            [24] => is_subclass_of
            [25] => is_a
            [26] => get_class_vars
            [27] => get_object_vars
            [28] => get_class_methods
            [29] => trigger_error
            [30] => user_error
            [31] => set_error_handler
            [32] => restore_error_handler
            [33] => set_exception_handler
            [34] => restore_exception_handler
            [35] => get_declared_classes
            [36] => get_declared_interfaces
            [37] => get_defined_functions
            [38] => get_defined_vars
            [39] => create_function
            [40] => get_resource_type
            [41] => get_loaded_extensions
            [42] => extension_loaded
            [43] => get_extension_funcs
            [44] => get_defined_constants
            [45] => debug_backtrace
            [46] => debug_print_backtrace
            [47] => gc_collect_cycles
            [48] => gc_enabled
            [49] => gc_enable
            [50] => gc_disable
            [51] => strtotime
            [52] => date
            [53] => idate
            [54] => gmdate
            [55] => mktime
            [56] => gmmktime
            [57] => checkdate
            [58] => strftime
            [59] => gmstrftime
            [60] => time
            [61] => localtime
            [62] => getdate
            [63] => date_create
            [64] => date_create_from_format
            [65] => date_parse
            [66] => date_parse_from_format
            [67] => date_get_last_errors
            [68] => date_format
            [69] => date_modify
            [70] => date_add
            [71] => date_sub
            [72] => date_timezone_get
            [73] => date_timezone_set
            [74] => date_offset_get
            [75] => date_diff
            [76] => date_time_set
            [77] => date_date_set
            [78] => date_isodate_set
            [79] => date_timestamp_set
            [80] => date_timestamp_get
            [81] => timezone_open
            [82] => timezone_name_get
            [83] => timezone_name_from_abbr
            [84] => timezone_offset_get
            [85] => timezone_transitions_get
            [86] => timezone_location_get
            [87] => timezone_identifiers_list
            [88] => timezone_abbreviations_list
            [89] => timezone_version_get
            [90] => date_interval_create_from_date_string
            [91] => date_interval_format
            [92] => date_default_timezone_set
            [93] => date_default_timezone_get
            [94] => date_sunrise
            [95] => date_sunset
            [96] => date_sun_info
            [97] => ereg
            [98] => ereg_replace
            [99] => eregi
            [100] => eregi_replace
            [101] => split
            [102] => spliti
            [103] => sql_regcase
            [104] => libxml_set_streams_context
            [105] => libxml_use_internal_errors
            [106] => libxml_get_last_error
            [107] => libxml_clear_errors
            [108] => libxml_get_errors
            [109] => libxml_disable_entity_loader
            [110] => openssl_pkey_free
            [111] => openssl_pkey_new
            [112] => openssl_pkey_export
            [113] => openssl_pkey_export_to_file
            [114] => openssl_pkey_get_private
            [115] => openssl_pkey_get_public
            [116] => openssl_pkey_get_details
            [117] => openssl_free_key
            [118] => openssl_get_privatekey
            [119] => openssl_get_publickey
            [120] => openssl_x509_read
            [121] => openssl_x509_free
            [122] => openssl_x509_parse
            [123] => openssl_x509_checkpurpose
            [124] => openssl_x509_check_private_key
            [125] => openssl_x509_export
            [126] => openssl_x509_export_to_file
            [127] => openssl_pkcs12_export
            [128] => openssl_pkcs12_export_to_file
            [129] => openssl_pkcs12_read
            [130] => openssl_csr_new
            [131] => openssl_csr_export
            [132] => openssl_csr_export_to_file
            [133] => openssl_csr_sign
            [134] => openssl_csr_get_subject
            [135] => openssl_csr_get_public_key
            [136] => openssl_digest
            [137] => openssl_encrypt
            [138] => openssl_decrypt
            [139] => openssl_cipher_iv_length
            [140] => openssl_sign
            [141] => openssl_verify
            [142] => openssl_seal
            [143] => openssl_open
            [144] => openssl_pkcs7_verify
            [145] => openssl_pkcs7_decrypt
            [146] => openssl_pkcs7_sign
            [147] => openssl_pkcs7_encrypt
            [148] => openssl_private_encrypt
            [149] => openssl_private_decrypt
            [150] => openssl_public_encrypt
            [151] => openssl_public_decrypt
            [152] => openssl_get_md_methods
            [153] => openssl_get_cipher_methods
            [154] => openssl_dh_compute_key
            [155] => openssl_random_pseudo_bytes
            [156] => openssl_error_string
            [157] => preg_match
            [158] => preg_match_all
            [159] => preg_replace
            [160] => preg_replace_callback
            [161] => preg_filter
            [162] => preg_split
            [163] => preg_quote
            [164] => preg_grep
            [165] => preg_last_error
            [166] => readgzfile
            [167] => gzrewind
            [168] => gzclose
            [169] => gzeof
            [170] => gzgetc
            [171] => gzgets
            [172] => gzgetss
            [173] => gzread
            [174] => gzopen
            [175] => gzpassthru
            [176] => gzseek
            [177] => gztell
            [178] => gzwrite
            [179] => gzputs
            [180] => gzfile
            [181] => gzcompress
            [182] => gzuncompress
            [183] => gzdeflate
            [184] => gzinflate
            [185] => gzencode
            [186] => ob_gzhandler
            [187] => zlib_get_coding_type
            [188] => ctype_alnum
            [189] => ctype_alpha
            [190] => ctype_cntrl
            [191] => ctype_digit
            [192] => ctype_lower
            [193] => ctype_graph
            [194] => ctype_print
            [195] => ctype_punct
            [196] => ctype_space
            [197] => ctype_upper
            [198] => ctype_xdigit
            [199] => curl_init
            [200] => curl_copy_handle
            [201] => curl_version
            [202] => curl_setopt
            [203] => curl_setopt_array
            [204] => curl_exec
            [205] => curl_getinfo
            [206] => curl_error
            [207] => curl_errno
            [208] => curl_close
            [209] => curl_multi_init
            [210] => curl_multi_add_handle
            [211] => curl_multi_remove_handle
            [212] => curl_multi_select
            [213] => curl_multi_exec
            [214] => curl_multi_getcontent
            [215] => curl_multi_info_read
            [216] => curl_multi_close
            [217] => dom_import_simplexml
            [218] => finfo_open
            [219] => finfo_close
            [220] => finfo_set_flags
            [221] => finfo_file
            [222] => finfo_buffer
            [223] => mime_content_type
            [224] => filter_input
            [225] => filter_var
            [226] => filter_input_array
            [227] => filter_var_array
            [228] => filter_list
            [229] => filter_has_var
            [230] => filter_id
            [231] => ftp_connect
            [232] => ftp_ssl_connect
            [233] => ftp_login
            [234] => ftp_pwd
            [235] => ftp_cdup
            [236] => ftp_chdir
            [237] => ftp_exec
            [238] => ftp_raw
            [239] => ftp_mkdir
            [240] => ftp_rmdir
            [241] => ftp_chmod
            [242] => ftp_alloc
            [243] => ftp_nlist
            [244] => ftp_rawlist
            [245] => ftp_systype
            [246] => ftp_pasv
            [247] => ftp_get
            [248] => ftp_fget
            [249] => ftp_put
            [250] => ftp_fput
            [251] => ftp_size
            [252] => ftp_mdtm
            [253] => ftp_rename
            [254] => ftp_delete
            [255] => ftp_site
            [256] => ftp_close
            [257] => ftp_set_option
            [258] => ftp_get_option
            [259] => ftp_nb_fget
            [260] => ftp_nb_get
            [261] => ftp_nb_continue
            [262] => ftp_nb_put
            [263] => ftp_nb_fput
            [264] => ftp_quit
            [265] => gd_info
            [266] => imagearc
            [267] => imageellipse
            [268] => imagechar
            [269] => imagecharup
            [270] => imagecolorat
            [271] => imagecolorallocate
            [272] => imagepalettecopy
            [273] => imagecreatefromstring
            [274] => imagecolorclosest
            [275] => imagecolorclosesthwb
            [276] => imagecolordeallocate
            [277] => imagecolorresolve
            [278] => imagecolorexact
            [279] => imagecolorset
            [280] => imagecolortransparent
            [281] => imagecolorstotal
            [282] => imagecolorsforindex
            [283] => imagecopy
            [284] => imagecopymerge
            [285] => imagecopymergegray
            [286] => imagecopyresized
            [287] => imagecreate
            [288] => imagecreatetruecolor
            [289] => imageistruecolor
            [290] => imagetruecolortopalette
            [291] => imagesetthickness
            [292] => imagefilledarc
            [293] => imagefilledellipse
            [294] => imagealphablending
            [295] => imagesavealpha
            [296] => imagecolorallocatealpha
            [297] => imagecolorresolvealpha
            [298] => imagecolorclosestalpha
            [299] => imagecolorexactalpha
            [300] => imagecopyresampled
            [301] => imagerotate
            [302] => imageantialias
            [303] => imagesettile
            [304] => imagesetbrush
            [305] => imagesetstyle
            [306] => imagecreatefrompng
            [307] => imagecreatefromgif
            [308] => imagecreatefromjpeg
            [309] => imagecreatefromwbmp
            [310] => imagecreatefromxbm
            [311] => imagecreatefromgd
            [312] => imagecreatefromgd2
            [313] => imagecreatefromgd2part
            [314] => imagepng
            [315] => imagegif
            [316] => imagejpeg
            [317] => imagewbmp
            [318] => imagegd
            [319] => imagegd2
            [320] => imagedestroy
            [321] => imagegammacorrect
            [322] => imagefill
            [323] => imagefilledpolygon
            [324] => imagefilledrectangle
            [325] => imagefilltoborder
            [326] => imagefontwidth
            [327] => imagefontheight
            [328] => imageinterlace
            [329] => imageline
            [330] => imageloadfont
            [331] => imagepolygon
            [332] => imagerectangle
            [333] => imagesetpixel
            [334] => imagestring
            [335] => imagestringup
            [336] => imagesx
            [337] => imagesy
            [338] => imagedashedline
            [339] => imagettfbbox
            [340] => imagettftext
            [341] => imageftbbox
            [342] => imagefttext
            [343] => imagetypes
            [344] => jpeg2wbmp
            [345] => png2wbmp
            [346] => image2wbmp
            [347] => imagelayereffect
            [348] => imagexbm
            [349] => imagecolormatch
            [350] => imagefilter
            [351] => imageconvolution
            [352] => hash
            [353] => hash_file
            [354] => hash_hmac
            [355] => hash_hmac_file
            [356] => hash_init
            [357] => hash_update
            [358] => hash_update_stream
            [359] => hash_update_file
            [360] => hash_final
            [361] => hash_copy
            [362] => hash_algos
            [363] => mhash_keygen_s2k
            [364] => mhash_get_block_size
            [365] => mhash_get_hash_name
            [366] => mhash_count
            [367] => mhash
            [368] => iconv
            [369] => ob_iconv_handler
            [370] => iconv_get_encoding
            [371] => iconv_set_encoding
            [372] => iconv_strlen
            [373] => iconv_substr
            [374] => iconv_strpos
            [375] => iconv_strrpos
            [376] => iconv_mime_encode
            [377] => iconv_mime_decode
            [378] => iconv_mime_decode_headers
            [379] => json_encode
            [380] => json_decode
            [381] => json_last_error
            [382] => mb_convert_case
            [383] => mb_strtoupper
            [384] => mb_strtolower
            [385] => mb_language
            [386] => mb_internal_encoding
            [387] => mb_http_input
            [388] => mb_http_output
            [389] => mb_detect_order
            [390] => mb_substitute_character
            [391] => mb_parse_str
            [392] => mb_output_handler
            [393] => mb_preferred_mime_name
            [394] => mb_strlen
            [395] => mb_strpos
            [396] => mb_strrpos
            [397] => mb_stripos
            [398] => mb_strripos
            [399] => mb_strstr
            [400] => mb_strrchr
            [401] => mb_stristr
            [402] => mb_strrichr
            [403] => mb_substr_count
            [404] => mb_substr
            [405] => mb_strcut
            [406] => mb_strwidth
            [407] => mb_strimwidth
            [408] => mb_convert_encoding
            [409] => mb_detect_encoding
            [410] => mb_list_encodings
            [411] => mb_encoding_aliases
            [412] => mb_convert_kana
            [413] => mb_encode_mimeheader
            [414] => mb_decode_mimeheader
            [415] => mb_convert_variables
            [416] => mb_encode_numericentity
            [417] => mb_decode_numericentity
            [418] => mb_send_mail
            [419] => mb_get_info
            [420] => mb_check_encoding
            [421] => mb_regex_encoding
            [422] => mb_regex_set_options
            [423] => mb_ereg
            [424] => mb_eregi
            [425] => mb_ereg_replace
            [426] => mb_eregi_replace
            [427] => mb_split
            [428] => mb_ereg_match
            [429] => mb_ereg_search
            [430] => mb_ereg_search_pos
            [431] => mb_ereg_search_regs
            [432] => mb_ereg_search_init
            [433] => mb_ereg_search_getregs
            [434] => mb_ereg_search_getpos
            [435] => mb_ereg_search_setpos
            [436] => mbregex_encoding
            [437] => mbereg
            [438] => mberegi
            [439] => mbereg_replace
            [440] => mberegi_replace
            [441] => mbsplit
            [442] => mbereg_match
            [443] => mbereg_search
            [444] => mbereg_search_pos
            [445] => mbereg_search_regs
            [446] => mbereg_search_init
            [447] => mbereg_search_getregs
            [448] => mbereg_search_getpos
            [449] => mbereg_search_setpos
            [450] => mcrypt_ecb
            [451] => mcrypt_cbc
            [452] => mcrypt_cfb
            [453] => mcrypt_ofb
            [454] => mcrypt_get_key_size
            [455] => mcrypt_get_block_size
            [456] => mcrypt_get_cipher_name
            [457] => mcrypt_create_iv
            [458] => mcrypt_list_algorithms
            [459] => mcrypt_list_modes
            [460] => mcrypt_get_iv_size
            [461] => mcrypt_encrypt
            [462] => mcrypt_decrypt
            [463] => mcrypt_module_open
            [464] => mcrypt_generic_init
            [465] => mcrypt_generic
            [466] => mdecrypt_generic
            [467] => mcrypt_generic_end
            [468] => mcrypt_generic_deinit
            [469] => mcrypt_enc_self_test
            [470] => mcrypt_enc_is_block_algorithm_mode
            [471] => mcrypt_enc_is_block_algorithm
            [472] => mcrypt_enc_is_block_mode
            [473] => mcrypt_enc_get_block_size
            [474] => mcrypt_enc_get_key_size
            [475] => mcrypt_enc_get_supported_key_sizes
            [476] => mcrypt_enc_get_iv_size
            [477] => mcrypt_enc_get_algorithms_name
            [478] => mcrypt_enc_get_modes_name
            [479] => mcrypt_module_self_test
            [480] => mcrypt_module_is_block_algorithm_mode
            [481] => mcrypt_module_is_block_algorithm
            [482] => mcrypt_module_is_block_mode
            [483] => mcrypt_module_get_algo_block_size
            [484] => mcrypt_module_get_algo_key_size
            [485] => mcrypt_module_get_supported_key_sizes
            [486] => mcrypt_module_close
            [487] => mysql_connect
            [488] => mysql_pconnect
            [489] => mysql_close
            [490] => mysql_select_db
            [491] => mysql_query
            [492] => mysql_unbuffered_query
            [493] => mysql_db_query
            [494] => mysql_list_dbs
            [495] => mysql_list_tables
            [496] => mysql_list_fields
            [497] => mysql_list_processes
            [498] => mysql_error
            [499] => mysql_errno
            [500] => mysql_affected_rows
            [501] => mysql_insert_id
            [502] => mysql_result
            [503] => mysql_num_rows
            [504] => mysql_num_fields
            [505] => mysql_fetch_row
            [506] => mysql_fetch_array
            [507] => mysql_fetch_assoc
            [508] => mysql_fetch_object
            [509] => mysql_data_seek
            [510] => mysql_fetch_lengths
            [511] => mysql_fetch_field
            [512] => mysql_field_seek
            [513] => mysql_free_result
            [514] => mysql_field_name
            [515] => mysql_field_table
            [516] => mysql_field_len
            [517] => mysql_field_type
            [518] => mysql_field_flags
            [519] => mysql_escape_string
            [520] => mysql_real_escape_string
            [521] => mysql_stat
            [522] => mysql_thread_id
            [523] => mysql_client_encoding
            [524] => mysql_ping
            [525] => mysql_get_client_info
            [526] => mysql_get_host_info
            [527] => mysql_get_proto_info
            [528] => mysql_get_server_info
            [529] => mysql_info
            [530] => mysql_set_charset
            [531] => mysql
            [532] => mysql_fieldname
            [533] => mysql_fieldtable
            [534] => mysql_fieldlen
            [535] => mysql_fieldtype
            [536] => mysql_fieldflags
            [537] => mysql_selectdb
            [538] => mysql_freeresult
            [539] => mysql_numfields
            [540] => mysql_numrows
            [541] => mysql_listdbs
            [542] => mysql_listtables
            [543] => mysql_listfields
            [544] => mysql_db_name
            [545] => mysql_dbname
            [546] => mysql_tablename
            [547] => mysql_table_name
            [548] => spl_classes
            [549] => spl_autoload
            [550] => spl_autoload_extensions
            [551] => spl_autoload_register
            [552] => spl_autoload_unregister
            [553] => spl_autoload_functions
            [554] => spl_autoload_call
            [555] => class_parents
            [556] => class_implements
            [557] => spl_object_hash
            [558] => iterator_to_array
            [559] => iterator_count
            [560] => iterator_apply
            [561] => pdo_drivers
            [562] => posix_kill
            [563] => posix_getpid
            [564] => posix_getppid
            [565] => posix_getuid
            [566] => posix_setuid
            [567] => posix_geteuid
            [568] => posix_seteuid
            [569] => posix_getgid
            [570] => posix_setgid
            [571] => posix_getegid
            [572] => posix_setegid
            [573] => posix_getgroups
            [574] => posix_getlogin
            [575] => posix_getpgrp
            [576] => posix_setsid
            [577] => posix_setpgid
            [578] => posix_getpgid
            [579] => posix_getsid
            [580] => posix_uname
            [581] => posix_times
            [582] => posix_ctermid
            [583] => posix_ttyname
            [584] => posix_isatty
            [585] => posix_getcwd
            [586] => posix_mkfifo
            [587] => posix_mknod
            [588] => posix_access
            [589] => posix_getgrnam
            [590] => posix_getgrgid
            [591] => posix_getpwnam
            [592] => posix_getpwuid
            [593] => posix_getrlimit
            [594] => posix_get_last_error
            [595] => posix_errno
            [596] => posix_strerror
            [597] => posix_initgroups
            [598] => session_name
            [599] => session_module_name
            [600] => session_save_path
            [601] => session_id
            [602] => session_regenerate_id
            [603] => session_decode
            [604] => session_register
            [605] => session_unregister
            [606] => session_is_registered
            [607] => session_encode
            [608] => session_start
            [609] => session_destroy
            [610] => session_unset
            [611] => session_set_save_handler
            [612] => session_cache_limiter
            [613] => session_cache_expire
            [614] => session_set_cookie_params
            [615] => session_get_cookie_params
            [616] => session_write_close
            [617] => session_commit
            [618] => simplexml_load_file
            [619] => simplexml_load_string
            [620] => simplexml_import_dom
            [621] => socket_select
            [622] => socket_create
            [623] => socket_create_listen
            [624] => socket_create_pair
            [625] => socket_accept
            [626] => socket_set_nonblock
            [627] => socket_set_block
            [628] => socket_listen
            [629] => socket_close
            [630] => socket_write
            [631] => socket_read
            [632] => socket_getsockname
            [633] => socket_getpeername
            [634] => socket_connect
            [635] => socket_strerror
            [636] => socket_bind
            [637] => socket_recv
            [638] => socket_send
            [639] => socket_recvfrom
            [640] => socket_sendto
            [641] => socket_get_option
            [642] => socket_set_option
            [643] => socket_shutdown
            [644] => socket_last_error
            [645] => socket_clear_error
            [646] => socket_getopt
            [647] => socket_setopt
            [648] => sqlite_open
            [649] => sqlite_popen
            [650] => sqlite_close
            [651] => sqlite_query
            [652] => sqlite_exec
            [653] => sqlite_array_query
            [654] => sqlite_single_query
            [655] => sqlite_fetch_array
            [656] => sqlite_fetch_object
            [657] => sqlite_fetch_single
            [658] => sqlite_fetch_string
            [659] => sqlite_fetch_all
            [660] => sqlite_current
            [661] => sqlite_column
            [662] => sqlite_libversion
            [663] => sqlite_libencoding
            [664] => sqlite_changes
            [665] => sqlite_last_insert_rowid
            [666] => sqlite_num_rows
            [667] => sqlite_num_fields
            [668] => sqlite_field_name
            [669] => sqlite_seek
            [670] => sqlite_rewind
            [671] => sqlite_next
            [672] => sqlite_prev
            [673] => sqlite_valid
            [674] => sqlite_has_more
            [675] => sqlite_has_prev
            [676] => sqlite_escape_string
            [677] => sqlite_busy_timeout
            [678] => sqlite_last_error
            [679] => sqlite_error_string
            [680] => sqlite_unbuffered_query
            [681] => sqlite_create_aggregate
            [682] => sqlite_create_function
            [683] => sqlite_factory
            [684] => sqlite_udf_encode_binary
            [685] => sqlite_udf_decode_binary
            [686] => sqlite_fetch_column_types
            [687] => constant
            [688] => bin2hex
            [689] => sleep
            [690] => usleep
            [691] => time_nanosleep
            [692] => time_sleep_until
            [693] => strptime
            [694] => flush
            [695] => wordwrap
            [696] => htmlspecialchars
            [697] => htmlentities
            [698] => html_entity_decode
            [699] => htmlspecialchars_decode
            [700] => get_html_translation_table
            [701] => sha1
            [702] => sha1_file
            [703] => md5
            [704] => md5_file
            [705] => crc32
            [706] => iptcparse
            [707] => iptcembed
            [708] => getimagesize
            [709] => image_type_to_mime_type
            [710] => image_type_to_extension
            [711] => phpinfo
            [712] => phpversion
            [713] => phpcredits
            [714] => php_logo_guid
            [715] => php_real_logo_guid
            [716] => php_egg_logo_guid
            [717] => zend_logo_guid
            [718] => php_sapi_name
            [719] => php_uname
            [720] => php_ini_scanned_files
            [721] => php_ini_loaded_file
            [722] => strnatcmp
            [723] => strnatcasecmp
            [724] => substr_count
            [725] => strspn
            [726] => strcspn
            [727] => strtok
            [728] => strtoupper
            [729] => strtolower
            [730] => strpos
            [731] => stripos
            [732] => strrpos
            [733] => strripos
            [734] => strrev
            [735] => hebrev
            [736] => hebrevc
            [737] => nl2br
            [738] => basename
            [739] => dirname
            [740] => pathinfo
            [741] => stripslashes
            [742] => stripcslashes
            [743] => strstr
            [744] => stristr
            [745] => strrchr
            [746] => str_shuffle
            [747] => str_word_count
            [748] => str_split
            [749] => strpbrk
            [750] => substr_compare
            [751] => strcoll
            [752] => money_format
            [753] => substr
            [754] => substr_replace
            [755] => quotemeta
            [756] => ucfirst
            [757] => lcfirst
            [758] => ucwords
            [759] => strtr
            [760] => addslashes
            [761] => addcslashes
            [762] => rtrim
            [763] => str_replace
            [764] => str_ireplace
            [765] => str_repeat
            [766] => count_chars
            [767] => chunk_split
            [768] => trim
            [769] => ltrim
            [770] => strip_tags
            [771] => similar_text
            [772] => explode
            [773] => implode
            [774] => join
            [775] => setlocale
            [776] => localeconv
            [777] => nl_langinfo
            [778] => soundex
            [779] => levenshtein
            [780] => chr
            [781] => ord
            [782] => parse_str
            [783] => str_getcsv
            [784] => str_pad
            [785] => chop
            [786] => strchr
            [787] => sprintf
            [788] => printf
            [789] => vprintf
            [790] => vsprintf
            [791] => fprintf
            [792] => vfprintf
            [793] => sscanf
            [794] => fscanf
            [795] => parse_url
            [796] => urlencode
            [797] => urldecode
            [798] => rawurlencode
            [799] => rawurldecode
            [800] => http_build_query
            [801] => readlink
            [802] => linkinfo
            [803] => symlink
            [804] => link
            [805] => unlink
            [806] => exec
            [807] => system
            [808] => escapeshellcmd
            [809] => escapeshellarg
            [810] => passthru
            [811] => shell_exec
            [812] => proc_open
            [813] => proc_close
            [814] => proc_terminate
            [815] => proc_get_status
            [816] => proc_nice
            [817] => rand
            [818] => srand
            [819] => getrandmax
            [820] => mt_rand
            [821] => mt_srand
            [822] => mt_getrandmax
            [823] => getservbyname
            [824] => getservbyport
            [825] => getprotobyname
            [826] => getprotobynumber
            [827] => getmyuid
            [828] => getmygid
            [829] => getmypid
            [830] => getmyinode
            [831] => getlastmod
            [832] => base64_decode
            [833] => base64_encode
            [834] => convert_uuencode
            [835] => convert_uudecode
            [836] => abs
            [837] => ceil
            [838] => floor
            [839] => round
            [840] => sin
            [841] => cos
            [842] => tan
            [843] => asin
            [844] => acos
            [845] => atan
            [846] => atanh
            [847] => atan2
            [848] => sinh
            [849] => cosh
            [850] => tanh
            [851] => asinh
            [852] => acosh
            [853] => expm1
            [854] => log1p
            [855] => pi
            [856] => is_finite
            [857] => is_nan
            [858] => is_infinite
            [859] => pow
            [860] => exp
            [861] => log
            [862] => log10
            [863] => sqrt
            [864] => hypot
            [865] => deg2rad
            [866] => rad2deg
            [867] => bindec
            [868] => hexdec
            [869] => octdec
            [870] => decbin
            [871] => decoct
            [872] => dechex
            [873] => base_convert
            [874] => number_format
            [875] => fmod
            [876] => inet_ntop
            [877] => inet_pton
            [878] => ip2long
            [879] => long2ip
            [880] => getenv
            [881] => putenv
            [882] => getopt
            [883] => sys_getloadavg
            [884] => microtime
            [885] => gettimeofday
            [886] => getrusage
            [887] => uniqid
            [888] => quoted_printable_decode
            [889] => quoted_printable_encode
            [890] => convert_cyr_string
            [891] => get_current_user
            [892] => set_time_limit
            [893] => get_cfg_var
            [894] => magic_quotes_runtime
            [895] => set_magic_quotes_runtime
            [896] => get_magic_quotes_gpc
            [897] => get_magic_quotes_runtime
            [898] => import_request_variables
            [899] => error_log
            [900] => error_get_last
            [901] => call_user_func
            [902] => call_user_func_array
            [903] => call_user_method
            [904] => call_user_method_array
            [905] => forward_static_call
            [906] => forward_static_call_array
            [907] => serialize
            [908] => unserialize
            [909] => var_dump
            [910] => var_export
            [911] => debug_zval_dump
            [912] => print_r
            [913] => memory_get_usage
            [914] => memory_get_peak_usage
            [915] => register_shutdown_function
            [916] => register_tick_function
            [917] => unregister_tick_function
            [918] => highlight_file
            [919] => show_source
            [920] => highlight_string
            [921] => php_strip_whitespace
            [922] => ini_get
            [923] => ini_get_all
            [924] => ini_set
            [925] => ini_alter
            [926] => ini_restore
            [927] => get_include_path
            [928] => set_include_path
            [929] => restore_include_path
            [930] => setcookie
            [931] => setrawcookie
            [932] => header
            [933] => header_remove
            [934] => headers_sent
            [935] => headers_list
            [936] => connection_aborted
            [937] => connection_status
            [938] => ignore_user_abort
            [939] => parse_ini_file
            [940] => parse_ini_string
            [941] => is_uploaded_file
            [942] => move_uploaded_file
            [943] => gethostbyaddr
            [944] => gethostbyname
            [945] => gethostbynamel
            [946] => gethostname
            [947] => dns_check_record
            [948] => checkdnsrr
            [949] => dns_get_mx
            [950] => getmxrr
            [951] => dns_get_record
            [952] => intval
            [953] => floatval
            [954] => doubleval
            [955] => strval
            [956] => gettype
            [957] => settype
            [958] => is_null
            [959] => is_resource
            [960] => is_bool
            [961] => is_long
            [962] => is_float
            [963] => is_int
            [964] => is_integer
            [965] => is_double
            [966] => is_real
            [967] => is_numeric
            [968] => is_string
            [969] => is_array
            [970] => is_object
            [971] => is_scalar
            [972] => is_callable
            [973] => pclose
            [974] => popen
            [975] => readfile
            [976] => rewind
            [977] => rmdir
            [978] => umask
            [979] => fclose
            [980] => feof
            [981] => fgetc
            [982] => fgets
            [983] => fgetss
            [984] => fread
            [985] => fopen
            [986] => fpassthru
            [987] => ftruncate
            [988] => fstat
            [989] => fseek
            [990] => ftell
            [991] => fflush
            [992] => fwrite
            [993] => fputs
            [994] => mkdir
            [995] => rename
            [996] => copy
            [997] => tempnam
            [998] => tmpfile
            [999] => file
            [1000] => file_get_contents
            [1001] => file_put_contents
            [1002] => stream_select
            [1003] => stream_context_create
            [1004] => stream_context_set_params
            [1005] => stream_context_get_params
            [1006] => stream_context_set_option
            [1007] => stream_context_get_options
            [1008] => stream_context_get_default
            [1009] => stream_context_set_default
            [1010] => stream_filter_prepend
            [1011] => stream_filter_append
            [1012] => stream_filter_remove
            [1013] => stream_socket_client
            [1014] => stream_socket_server
            [1015] => stream_socket_accept
            [1016] => stream_socket_get_name
            [1017] => stream_socket_recvfrom
            [1018] => stream_socket_sendto
            [1019] => stream_socket_enable_crypto
            [1020] => stream_socket_shutdown
            [1021] => stream_socket_pair
            [1022] => stream_copy_to_stream
            [1023] => stream_get_contents
            [1024] => stream_supports_lock
            [1025] => fgetcsv
            [1026] => fputcsv
            [1027] => flock
            [1028] => get_meta_tags
            [1029] => stream_set_read_buffer
            [1030] => stream_set_write_buffer
            [1031] => set_file_buffer
            [1032] => set_socket_blocking
            [1033] => stream_set_blocking
            [1034] => socket_set_blocking
            [1035] => stream_get_meta_data
            [1036] => stream_get_line
            [1037] => stream_wrapper_register
            [1038] => stream_register_wrapper
            [1039] => stream_wrapper_unregister
            [1040] => stream_wrapper_restore
            [1041] => stream_get_wrappers
            [1042] => stream_get_transports
            [1043] => stream_resolve_include_path
            [1044] => stream_is_local
            [1045] => get_headers
            [1046] => stream_set_timeout
            [1047] => socket_set_timeout
            [1048] => socket_get_status
            [1049] => realpath
            [1050] => fnmatch
            [1051] => fsockopen
            [1052] => pfsockopen
            [1053] => pack
            [1054] => unpack
            [1055] => get_browser
            [1056] => crypt
            [1057] => opendir
            [1058] => closedir
            [1059] => chdir
            [1060] => getcwd
            [1061] => rewinddir
            [1062] => readdir
            [1063] => dir
            [1064] => scandir
            [1065] => glob
            [1066] => fileatime
            [1067] => filectime
            [1068] => filegroup
            [1069] => fileinode
            [1070] => filemtime
            [1071] => fileowner
            [1072] => fileperms
            [1073] => filesize
            [1074] => filetype
            [1075] => file_exists
            [1076] => is_writable
            [1077] => is_writeable
            [1078] => is_readable
            [1079] => is_executable
            [1080] => is_file
            [1081] => is_dir
            [1082] => is_link
            [1083] => stat
            [1084] => lstat
            [1085] => chown
            [1086] => chgrp
            [1087] => lchown
            [1088] => lchgrp
            [1089] => chmod
            [1090] => touch
            [1091] => clearstatcache
            [1092] => disk_total_space
            [1093] => disk_free_space
            [1094] => diskfreespace
            [1095] => realpath_cache_size
            [1096] => realpath_cache_get
            [1097] => mail
            [1098] => ezmlm_hash
            [1099] => openlog
            [1100] => syslog
            [1101] => closelog
            [1102] => define_syslog_variables
            [1103] => lcg_value
            [1104] => metaphone
            [1105] => ob_start
            [1106] => ob_flush
            [1107] => ob_clean
            [1108] => ob_end_flush
            [1109] => ob_end_clean
            [1110] => ob_get_flush
            [1111] => ob_get_clean
            [1112] => ob_get_length
            [1113] => ob_get_level
            [1114] => ob_get_status
            [1115] => ob_get_contents
            [1116] => ob_implicit_flush
            [1117] => ob_list_handlers
            [1118] => ksort
            [1119] => krsort
            [1120] => natsort
            [1121] => natcasesort
            [1122] => asort
            [1123] => arsort
            [1124] => sort
            [1125] => rsort
            [1126] => usort
            [1127] => uasort
            [1128] => uksort
            [1129] => shuffle
            [1130] => array_walk
            [1131] => array_walk_recursive
            [1132] => count
            [1133] => end
            [1134] => prev
            [1135] => next
            [1136] => reset
            [1137] => current
            [1138] => key
            [1139] => min
            [1140] => max
            [1141] => in_array
            [1142] => array_search
            [1143] => extract
            [1144] => compact
            [1145] => array_fill
            [1146] => array_fill_keys
            [1147] => range
            [1148] => array_multisort
            [1149] => array_push
            [1150] => array_pop
            [1151] => array_shift
            [1152] => array_unshift
            [1153] => array_splice
            [1154] => array_slice
            [1155] => array_merge
            [1156] => array_merge_recursive
            [1157] => array_replace
            [1158] => array_replace_recursive
            [1159] => array_keys
            [1160] => array_values
            [1161] => array_count_values
            [1162] => array_reverse
            [1163] => array_reduce
            [1164] => array_pad
            [1165] => array_flip
            [1166] => array_change_key_case
            [1167] => array_rand
            [1168] => array_unique
            [1169] => array_intersect
            [1170] => array_intersect_key
            [1171] => array_intersect_ukey
            [1172] => array_uintersect
            [1173] => array_intersect_assoc
            [1174] => array_uintersect_assoc
            [1175] => array_intersect_uassoc
            [1176] => array_uintersect_uassoc
            [1177] => array_diff
            [1178] => array_diff_key
            [1179] => array_diff_ukey
            [1180] => array_udiff
            [1181] => array_diff_assoc
            [1182] => array_udiff_assoc
            [1183] => array_diff_uassoc
            [1184] => array_udiff_uassoc
            [1185] => array_sum
            [1186] => array_product
            [1187] => array_filter
            [1188] => array_map
            [1189] => array_chunk
            [1190] => array_combine
            [1191] => array_key_exists
            [1192] => pos
            [1193] => sizeof
            [1194] => key_exists
            [1195] => assert
            [1196] => assert_options
            [1197] => version_compare
            [1198] => ftok
            [1199] => str_rot13
            [1200] => stream_get_filters
            [1201] => stream_filter_register
            [1202] => stream_bucket_make_writeable
            [1203] => stream_bucket_prepend
            [1204] => stream_bucket_append
            [1205] => stream_bucket_new
            [1206] => output_add_rewrite_var
            [1207] => output_reset_rewrite_vars
            [1208] => sys_get_temp_dir
            [1209] => token_get_all
            [1210] => token_name
            [1211] => xml_parser_create
            [1212] => xml_parser_create_ns
            [1213] => xml_set_object
            [1214] => xml_set_element_handler
            [1215] => xml_set_character_data_handler
            [1216] => xml_set_processing_instruction_handler
            [1217] => xml_set_default_handler
            [1218] => xml_set_unparsed_entity_decl_handler
            [1219] => xml_set_notation_decl_handler
            [1220] => xml_set_external_entity_ref_handler
            [1221] => xml_set_start_namespace_decl_handler
            [1222] => xml_set_end_namespace_decl_handler
            [1223] => xml_parse
            [1224] => xml_parse_into_struct
            [1225] => xml_get_error_code
            [1226] => xml_error_string
            [1227] => xml_get_current_line_number
            [1228] => xml_get_current_column_number
            [1229] => xml_get_current_byte_index
            [1230] => xml_parser_free
            [1231] => xml_parser_set_option
            [1232] => xml_parser_get_option
            [1233] => utf8_encode
            [1234] => utf8_decode
            [1235] => xmlwriter_open_uri
            [1236] => xmlwriter_open_memory
            [1237] => xmlwriter_set_indent
            [1238] => xmlwriter_set_indent_string
            [1239] => xmlwriter_start_comment
            [1240] => xmlwriter_end_comment
            [1241] => xmlwriter_start_attribute
            [1242] => xmlwriter_end_attribute
            [1243] => xmlwriter_write_attribute
            [1244] => xmlwriter_start_attribute_ns
            [1245] => xmlwriter_write_attribute_ns
            [1246] => xmlwriter_start_element
            [1247] => xmlwriter_end_element
            [1248] => xmlwriter_full_end_element
            [1249] => xmlwriter_start_element_ns
            [1250] => xmlwriter_write_element
            [1251] => xmlwriter_write_element_ns
            [1252] => xmlwriter_start_pi
            [1253] => xmlwriter_end_pi
            [1254] => xmlwriter_write_pi
            [1255] => xmlwriter_start_cdata
            [1256] => xmlwriter_end_cdata
            [1257] => xmlwriter_write_cdata
            [1258] => xmlwriter_text
            [1259] => xmlwriter_write_raw
            [1260] => xmlwriter_start_document
            [1261] => xmlwriter_end_document
            [1262] => xmlwriter_write_comment
            [1263] => xmlwriter_start_dtd
            [1264] => xmlwriter_end_dtd
            [1265] => xmlwriter_write_dtd
            [1266] => xmlwriter_start_dtd_element
            [1267] => xmlwriter_end_dtd_element
            [1268] => xmlwriter_write_dtd_element
            [1269] => xmlwriter_start_dtd_attlist
            [1270] => xmlwriter_end_dtd_attlist
            [1271] => xmlwriter_write_dtd_attlist
            [1272] => xmlwriter_start_dtd_entity
            [1273] => xmlwriter_end_dtd_entity
            [1274] => xmlwriter_write_dtd_entity
            [1275] => xmlwriter_output_memory
            [1276] => xmlwriter_flush
            [1277] => zip_open
            [1278] => zip_close
            [1279] => zip_read
            [1280] => zip_entry_open
            [1281] => zip_entry_close
            [1282] => zip_entry_read
            [1283] => zip_entry_filesize
            [1284] => zip_entry_name
            [1285] => zip_entry_compressedsize
            [1286] => zip_entry_compressionmethod
            [1287] => apache_lookup_uri
            [1288] => virtual
            [1289] => apache_request_headers
            [1290] => apache_response_headers
            [1291] => apache_setenv
            [1292] => apache_getenv
            [1293] => apache_note
            [1294] => apache_get_version
            [1295] => apache_get_modules
            [1296] => getallheaders
            [1297] => mysqli_affected_rows
            [1298] => mysqli_autocommit
            [1299] => mysqli_change_user
            [1300] => mysqli_character_set_name
            [1301] => mysqli_close
            [1302] => mysqli_commit
            [1303] => mysqli_connect
            [1304] => mysqli_connect_errno
            [1305] => mysqli_connect_error
            [1306] => mysqli_data_seek
            [1307] => mysqli_dump_debug_info
            [1308] => mysqli_debug
            [1309] => mysqli_errno
            [1310] => mysqli_error
            [1311] => mysqli_stmt_execute
            [1312] => mysqli_execute
            [1313] => mysqli_fetch_field
            [1314] => mysqli_fetch_fields
            [1315] => mysqli_fetch_field_direct
            [1316] => mysqli_fetch_lengths
            [1317] => mysqli_fetch_array
            [1318] => mysqli_fetch_assoc
            [1319] => mysqli_fetch_object
            [1320] => mysqli_fetch_row
            [1321] => mysqli_field_count
            [1322] => mysqli_field_seek
            [1323] => mysqli_field_tell
            [1324] => mysqli_free_result
            [1325] => mysqli_get_charset
            [1326] => mysqli_get_client_info
            [1327] => mysqli_get_client_version
            [1328] => mysqli_get_host_info
            [1329] => mysqli_get_proto_info
            [1330] => mysqli_get_server_info
            [1331] => mysqli_get_server_version
            [1332] => mysqli_get_warnings
            [1333] => mysqli_init
            [1334] => mysqli_info
            [1335] => mysqli_insert_id
            [1336] => mysqli_kill
            [1337] => mysqli_set_local_infile_default
            [1338] => mysqli_set_local_infile_handler
            [1339] => mysqli_more_results
            [1340] => mysqli_multi_query
            [1341] => mysqli_next_result
            [1342] => mysqli_num_fields
            [1343] => mysqli_num_rows
            [1344] => mysqli_options
            [1345] => mysqli_ping
            [1346] => mysqli_prepare
            [1347] => mysqli_report
            [1348] => mysqli_query
            [1349] => mysqli_real_connect
            [1350] => mysqli_real_escape_string
            [1351] => mysqli_real_query
            [1352] => mysqli_rollback
            [1353] => mysqli_select_db
            [1354] => mysqli_set_charset
            [1355] => mysqli_stmt_affected_rows
            [1356] => mysqli_stmt_attr_get
            [1357] => mysqli_stmt_attr_set
            [1358] => mysqli_stmt_bind_param
            [1359] => mysqli_stmt_bind_result
            [1360] => mysqli_stmt_close
            [1361] => mysqli_stmt_data_seek
            [1362] => mysqli_stmt_errno
            [1363] => mysqli_stmt_error
            [1364] => mysqli_stmt_fetch
            [1365] => mysqli_stmt_field_count
            [1366] => mysqli_stmt_free_result
            [1367] => mysqli_stmt_get_warnings
            [1368] => mysqli_stmt_init
            [1369] => mysqli_stmt_insert_id
            [1370] => mysqli_stmt_num_rows
            [1371] => mysqli_stmt_param_count
            [1372] => mysqli_stmt_prepare
            [1373] => mysqli_stmt_reset
            [1374] => mysqli_stmt_result_metadata
            [1375] => mysqli_stmt_send_long_data
            [1376] => mysqli_stmt_store_result
            [1377] => mysqli_stmt_sqlstate
            [1378] => mysqli_sqlstate
            [1379] => mysqli_ssl_set
            [1380] => mysqli_stat
            [1381] => mysqli_store_result
            [1382] => mysqli_thread_id
            [1383] => mysqli_thread_safe
            [1384] => mysqli_use_result
            [1385] => mysqli_warning_count
            [1386] => mysqli_refresh
            [1387] => mysqli_bind_param
            [1388] => mysqli_bind_result
            [1389] => mysqli_client_encoding
            [1390] => mysqli_escape_string
            [1391] => mysqli_fetch
            [1392] => mysqli_param_count
            [1393] => mysqli_get_metadata
            [1394] => mysqli_send_long_data
            [1395] => mysqli_set_opt
        )

    [user] => Array
        (
            [0] => memory_usage
            [1] => microtime_float
            [2] => formatsize
            [3] => valid_email
            [4] => show
            [5] => isfun
            [6] => test_int
            [7] => test_float
            [8] => test_io
            [9] => sys_linux
            [10] => sys_freebsd
            [11] => get_key
            [12] => find_command
            [13] => do_command
            [14] => sys_windows
            [15] => getwmi
            [16] => bar
        )

)