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该学习哪些PHP函数? PHP常用函数?

程序员文章站 2022-06-14 17:02:45
...
是这样的,最近在学习php,发现有好多函数,我知道数组array和字符串string函数比较重要,但查了手册
数组函数 array functions 有98个
字符串函数 string functions 有77个
这样就有98+77=175个了

还有文件操作系统 Filesystem Functions
PHP Options/Info Functions

....
好多啊,我该如何学习呢,困惑,望各位大侠指点一二

回复内容:

最常用的PHP函数是google()和php.net() 这些函数根本没有重要不重要之分,
用到了就会觉得它重要,用不到自然就无所谓,

其实函数什么的就是基本功,哪怕记不住,也必须知道有这么个函数,用的时候必须能查到。
常见的函数根本就不需要去记,多用几次自然就记住了。
除了这些函数外,还有一些经典的常用代码片段也是需要记住的。 你可以联系我,或者留下你的邮箱,我这个还是相对比较多而且是常用的

该学习哪些PHP函数? PHP常用函数?
你都好意思私信跟我要了,好意思不点赞??
Array
(
    [user] => Array
        (
            [0] => memory_usage
            [1] => microtime_float
            [2] => formatsize
            [3] => valid_email
            [4] => show
            [5] => isfun
            [6] => isfun1
            [7] => test_int
            [8] => test_float
            [9] => test_io
            [10] => getcoreinformation
            [11] => getcpupercentages
            [12] => makeimageurl
            [13] => sys_linux
            [14] => sys_freebsd
            [15] => get_key
            [16] => find_command
            [17] => do_command
            [18] => sys_windows
            [19] => getwmi
            [20] => bar
        )
    [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] => trait_exists
            [21] => function_exists
            [22] => class_alias
            [23] => get_included_files
            [24] => get_required_files
            [25] => is_subclass_of
            [26] => is_a
            [27] => get_class_vars
            [28] => get_object_vars
            [29] => get_class_methods
            [30] => trigger_error
            [31] => user_error
            [32] => set_error_handler
            [33] => restore_error_handler
            [34] => set_exception_handler
            [35] => restore_exception_handler
            [36] => get_declared_classes
            [37] => get_declared_traits
            [38] => get_declared_interfaces
            [39] => get_defined_functions
            [40] => get_defined_vars
            [41] => create_function
            [42] => get_resource_type
            [43] => get_loaded_extensions
            [44] => extension_loaded
            [45] => get_extension_funcs
            [46] => get_defined_constants
            [47] => debug_backtrace
            [48] => debug_print_backtrace
            [49] => gc_collect_cycles
            [50] => gc_enabled
            [51] => gc_enable
            [52] => gc_disable
            [53] => strtotime
            [54] => date
            [55] => idate
            [56] => gmdate
            [57] => mktime
            [58] => gmmktime
            [59] => checkdate
            [60] => strftime
            [61] => gmstrftime
            [62] => time
            [63] => localtime
            [64] => getdate
            [65] => date_create
            [66] => date_create_immutable
            [67] => date_create_from_format
            [68] => date_create_immutable_from_format
            [69] => date_parse
            [70] => date_parse_from_format
            [71] => date_get_last_errors
            [72] => date_format
            [73] => date_modify
            [74] => date_add
            [75] => date_sub
            [76] => date_timezone_get
            [77] => date_timezone_set
            [78] => date_offset_get
            [79] => date_diff
            [80] => date_time_set
            [81] => date_date_set
            [82] => date_isodate_set
            [83] => date_timestamp_set
            [84] => date_timestamp_get
            [85] => timezone_open
            [86] => timezone_name_get
            [87] => timezone_name_from_abbr
            [88] => timezone_offset_get
            [89] => timezone_transitions_get
            [90] => timezone_location_get
            [91] => timezone_identifiers_list
            [92] => timezone_abbreviations_list
            [93] => timezone_version_get
            [94] => date_interval_create_from_date_string
            [95] => date_interval_format
            [96] => date_default_timezone_set
            [97] => date_default_timezone_get
            [98] => date_sunrise
            [99] => date_sunset
            [100] => date_sun_info
            [101] => ereg
            [102] => ereg_replace
            [103] => eregi
            [104] => eregi_replace
            [105] => split
            [106] => spliti
            [107] => sql_regcase
            [108] => libxml_set_streams_context
            [109] => libxml_use_internal_errors
            [110] => libxml_get_last_error
            [111] => libxml_clear_errors
            [112] => libxml_get_errors
            [113] => libxml_disable_entity_loader
            [114] => libxml_set_external_entity_loader
            [115] => openssl_get_cert_locations
            [116] => openssl_spki_new
            [117] => openssl_spki_verify
            [118] => openssl_spki_export
            [119] => openssl_spki_export_challenge
            [120] => openssl_pkey_free
            [121] => openssl_pkey_new
            [122] => openssl_pkey_export
            [123] => openssl_pkey_export_to_file
            [124] => openssl_pkey_get_private
            [125] => openssl_pkey_get_public
            [126] => openssl_pkey_get_details
            [127] => openssl_free_key
            [128] => openssl_get_privatekey
            [129] => openssl_get_publickey
            [130] => openssl_x509_read
            [131] => openssl_x509_free
            [132] => openssl_x509_parse
            [133] => openssl_x509_checkpurpose
            [134] => openssl_x509_check_private_key
            [135] => openssl_x509_export
            [136] => openssl_x509_fingerprint
            [137] => openssl_x509_export_to_file
            [138] => openssl_pkcs12_export
            [139] => openssl_pkcs12_export_to_file
            [140] => openssl_pkcs12_read
            [141] => openssl_csr_new
            [142] => openssl_csr_export
            [143] => openssl_csr_export_to_file
            [144] => openssl_csr_sign
            [145] => openssl_csr_get_subject
            [146] => openssl_csr_get_public_key
            [147] => openssl_digest
            [148] => openssl_encrypt
            [149] => openssl_decrypt
            [150] => openssl_cipher_iv_length
            [151] => openssl_sign
            [152] => openssl_verify
            [153] => openssl_seal
            [154] => openssl_open
            [155] => openssl_pkcs7_verify
            [156] => openssl_pkcs7_decrypt
            [157] => openssl_pkcs7_sign
            [158] => openssl_pkcs7_encrypt
            [159] => openssl_private_encrypt
            [160] => openssl_private_decrypt
            [161] => openssl_public_encrypt
            [162] => openssl_public_decrypt
            [163] => openssl_get_md_methods
            [164] => openssl_get_cipher_methods
            [165] => openssl_dh_compute_key
            [166] => openssl_random_pseudo_bytes
            [167] => openssl_error_string
            [168] => preg_match
            [169] => preg_match_all
            [170] => preg_replace
            [171] => preg_replace_callback
            [172] => preg_filter
            [173] => preg_split
            [174] => preg_quote
            [175] => preg_grep
            [176] => preg_last_error
            [177] => readgzfile
            [178] => gzrewind
            [179] => gzclose
            [180] => gzeof
            [181] => gzgetc
            [182] => gzgets
            [183] => gzgetss
            [184] => gzread
            [185] => gzopen
            [186] => gzpassthru
            [187] => gzseek
            [188] => gztell
            [189] => gzwrite
            [190] => gzputs
            [191] => gzfile
            [192] => gzcompress
            [193] => gzuncompress
            [194] => gzdeflate
            [195] => gzinflate
            [196] => gzencode
            [197] => gzdecode
            [198] => zlib_encode
            [199] => zlib_decode
            [200] => zlib_get_coding_type
            [201] => ob_gzhandler
            [202] => ctype_alnum
            [203] => ctype_alpha
            [204] => ctype_cntrl
            [205] => ctype_digit
            [206] => ctype_lower
            [207] => ctype_graph
            [208] => ctype_print
            [209] => ctype_punct
            [210] => ctype_space
            [211] => ctype_upper
            [212] => ctype_xdigit
            [213] => curl_init
            [214] => curl_copy_handle
            [215] => curl_version
            [216] => curl_setopt
            [217] => curl_setopt_array
            [218] => curl_exec
            [219] => curl_getinfo
            [220] => curl_error
            [221] => curl_errno
            [222] => curl_close
            [223] => curl_strerror
            [224] => curl_multi_strerror
            [225] => curl_reset
            [226] => curl_escape
            [227] => curl_unescape
            [228] => curl_multi_init
            [229] => curl_multi_add_handle
            [230] => curl_multi_remove_handle
            [231] => curl_multi_select
            [232] => curl_multi_exec
            [233] => curl_multi_getcontent
            [234] => curl_multi_info_read
            [235] => curl_multi_close
            [236] => curl_multi_setopt
            [237] => curl_share_init
            [238] => curl_share_close
            [239] => curl_share_setopt
            [240] => curl_file_create
            [241] => dom_import_simplexml
            [242] => filter_input
            [243] => filter_var
            [244] => filter_input_array
            [245] => filter_var_array
            [246] => filter_list
            [247] => filter_has_var
            [248] => filter_id
            [249] => ftp_connect
            [250] => ftp_ssl_connect
            [251] => ftp_login
            [252] => ftp_pwd
            [253] => ftp_cdup
            [254] => ftp_chdir
            [255] => ftp_exec
            [256] => ftp_raw
            [257] => ftp_mkdir
            [258] => ftp_rmdir
            [259] => ftp_chmod
            [260] => ftp_alloc
            [261] => ftp_nlist
            [262] => ftp_rawlist
            [263] => ftp_systype
            [264] => ftp_pasv
            [265] => ftp_get
            [266] => ftp_fget
            [267] => ftp_put
            [268] => ftp_fput
            [269] => ftp_size
            [270] => ftp_mdtm
            [271] => ftp_rename
            [272] => ftp_delete
            [273] => ftp_site
            [274] => ftp_close
            [275] => ftp_set_option
            [276] => ftp_get_option
            [277] => ftp_nb_fget
            [278] => ftp_nb_get
            [279] => ftp_nb_continue
            [280] => ftp_nb_put
            [281] => ftp_nb_fput
            [282] => ftp_quit
            [283] => gd_info
            [284] => imagearc
            [285] => imageellipse
            [286] => imagechar
            [287] => imagecharup
            [288] => imagecolorat
            [289] => imagecolorallocate
            [290] => imagepalettecopy
            [291] => imagecreatefromstring
            [292] => imagecolorclosest
            [293] => imagecolorclosesthwb
            [294] => imagecolordeallocate
            [295] => imagecolorresolve
            [296] => imagecolorexact
            [297] => imagecolorset
            [298] => imagecolortransparent
            [299] => imagecolorstotal
            [300] => imagecolorsforindex
            [301] => imagecopy
            [302] => imagecopymerge
            [303] => imagecopymergegray
            [304] => imagecopyresized
            [305] => imagecreate
            [306] => imagecreatetruecolor
            [307] => imageistruecolor
            [308] => imagetruecolortopalette
            [309] => imagepalettetotruecolor
            [310] => imagesetthickness
            [311] => imagefilledarc
            [312] => imagefilledellipse
            [313] => imagealphablending
            [314] => imagesavealpha
            [315] => imagecolorallocatealpha
            [316] => imagecolorresolvealpha
            [317] => imagecolorclosestalpha
            [318] => imagecolorexactalpha
            [319] => imagecopyresampled
            [320] => imagerotate
            [321] => imageflip
            [322] => imageantialias
            [323] => imagecrop
            [324] => imagecropauto
            [325] => imagescale
            [326] => imageaffine
            [327] => imageaffinematrixconcat
            [328] => imageaffinematrixget
            [329] => imagesetinterpolation
            [330] => imagesettile
            [331] => imagesetbrush
            [332] => imagesetstyle
            [333] => imagecreatefrompng
            [334] => imagecreatefromgif
            [335] => imagecreatefromjpeg
            [336] => imagecreatefromwbmp
            [337] => imagecreatefromxbm
            [338] => imagecreatefromgd
            [339] => imagecreatefromgd2
            [340] => imagecreatefromgd2part
            [341] => imagepng
            [342] => imagegif
            [343] => imagejpeg
            [344] => imagewbmp
            [345] => imagegd
            [346] => imagegd2
            [347] => imagedestroy
            [348] => imagegammacorrect
            [349] => imagefill
            [350] => imagefilledpolygon
            [351] => imagefilledrectangle
            [352] => imagefilltoborder
            [353] => imagefontwidth
            [354] => imagefontheight
            [355] => imageinterlace
            [356] => imageline
            [357] => imageloadfont
            [358] => imagepolygon
            [359] => imagerectangle
            [360] => imagesetpixel
            [361] => imagestring
            [362] => imagestringup
            [363] => imagesx
            [364] => imagesy
            [365] => imagedashedline
            [366] => imagettfbbox
            [367] => imagettftext
            [368] => imageftbbox
            [369] => imagefttext
            [370] => imagetypes
            [371] => jpeg2wbmp
            [372] => png2wbmp
            [373] => image2wbmp
            [374] => imagelayereffect
            [375] => imagexbm
            [376] => imagecolormatch
            [377] => imagefilter
            [378] => imageconvolution
            [379] => hash
            [380] => hash_file
            [381] => hash_hmac
            [382] => hash_hmac_file
            [383] => hash_init
            [384] => hash_update
            [385] => hash_update_stream
            [386] => hash_update_file
            [387] => hash_final
            [388] => hash_copy
            [389] => hash_algos
            [390] => hash_pbkdf2
            [391] => hash_equals
            [392] => mhash_keygen_s2k
            [393] => mhash_get_block_size
            [394] => mhash_get_hash_name
            [395] => mhash_count
            [396] => mhash
            [397] => iconv
            [398] => iconv_get_encoding
            [399] => iconv_set_encoding
            [400] => iconv_strlen
            [401] => iconv_substr
            [402] => iconv_strpos
            [403] => iconv_strrpos
            [404] => iconv_mime_encode
            [405] => iconv_mime_decode
            [406] => iconv_mime_decode_headers
            [407] => json_encode
            [408] => json_decode
            [409] => json_last_error
            [410] => json_last_error_msg
            [411] => mb_convert_case
            [412] => mb_strtoupper
            [413] => mb_strtolower
            [414] => mb_language
            [415] => mb_internal_encoding
            [416] => mb_http_input
            [417] => mb_http_output
            [418] => mb_detect_order
            [419] => mb_substitute_character
            [420] => mb_parse_str
            [421] => mb_output_handler
            [422] => mb_preferred_mime_name
            [423] => mb_strlen
            [424] => mb_strpos
            [425] => mb_strrpos
            [426] => mb_stripos
            [427] => mb_strripos
            [428] => mb_strstr
            [429] => mb_strrchr
            [430] => mb_stristr
            [431] => mb_strrichr
            [432] => mb_substr_count
            [433] => mb_substr
            [434] => mb_strcut
            [435] => mb_strwidth
            [436] => mb_strimwidth
            [437] => mb_convert_encoding
            [438] => mb_detect_encoding
            [439] => mb_list_encodings
            [440] => mb_encoding_aliases
            [441] => mb_convert_kana
            [442] => mb_encode_mimeheader
            [443] => mb_decode_mimeheader
            [444] => mb_convert_variables
            [445] => mb_encode_numericentity
            [446] => mb_decode_numericentity
            [447] => mb_send_mail
            [448] => mb_get_info
            [449] => mb_check_encoding
            [450] => mb_regex_encoding
            [451] => mb_regex_set_options
            [452] => mb_ereg
            [453] => mb_eregi
            [454] => mb_ereg_replace
            [455] => mb_eregi_replace
            [456] => mb_ereg_replace_callback
            [457] => mb_split
            [458] => mb_ereg_match
            [459] => mb_ereg_search
            [460] => mb_ereg_search_pos
            [461] => mb_ereg_search_regs
            [462] => mb_ereg_search_init
            [463] => mb_ereg_search_getregs
            [464] => mb_ereg_search_getpos
            [465] => mb_ereg_search_setpos
            [466] => mbregex_encoding
            [467] => mbereg
            [468] => mberegi
            [469] => mbereg_replace
            [470] => mberegi_replace
            [471] => mbsplit
            [472] => mbereg_match
            [473] => mbereg_search
            [474] => mbereg_search_pos
            [475] => mbereg_search_regs
            [476] => mbereg_search_init
            [477] => mbereg_search_getregs
            [478] => mbereg_search_getpos
            [479] => mbereg_search_setpos
            [480] => mcrypt_ecb
            [481] => mcrypt_cbc
            [482] => mcrypt_cfb
            [483] => mcrypt_ofb
            [484] => mcrypt_get_key_size
            [485] => mcrypt_get_block_size
            [486] => mcrypt_get_cipher_name
            [487] => mcrypt_create_iv
            [488] => mcrypt_list_algorithms
            [489] => mcrypt_list_modes
            [490] => mcrypt_get_iv_size
            [491] => mcrypt_encrypt
            [492] => mcrypt_decrypt
            [493] => mcrypt_module_open
            [494] => mcrypt_generic_init
            [495] => mcrypt_generic
            [496] => mdecrypt_generic
            [497] => mcrypt_generic_end
            [498] => mcrypt_generic_deinit
            [499] => mcrypt_enc_self_test
            [500] => mcrypt_enc_is_block_algorithm_mode
            [501] => mcrypt_enc_is_block_algorithm
            [502] => mcrypt_enc_is_block_mode
            [503] => mcrypt_enc_get_block_size
            [504] => mcrypt_enc_get_key_size
            [505] => mcrypt_enc_get_supported_key_sizes
            [506] => mcrypt_enc_get_iv_size
            [507] => mcrypt_enc_get_algorithms_name
            [508] => mcrypt_enc_get_modes_name
            [509] => mcrypt_module_self_test
            [510] => mcrypt_module_is_block_algorithm_mode
            [511] => mcrypt_module_is_block_algorithm
            [512] => mcrypt_module_is_block_mode
            [513] => mcrypt_module_get_algo_block_size
            [514] => mcrypt_module_get_algo_key_size
            [515] => mcrypt_module_get_supported_key_sizes
            [516] => mcrypt_module_close
            [517] => mysql_connect
            [518] => mysql_pconnect
            [519] => mysql_close
            [520] => mysql_select_db
            [521] => mysql_query
            [522] => mysql_unbuffered_query
            [523] => mysql_db_query
            [524] => mysql_list_dbs
            [525] => mysql_list_tables
            [526] => mysql_list_fields
            [527] => mysql_list_processes
            [528] => mysql_error
            [529] => mysql_errno
            [530] => mysql_affected_rows
            [531] => mysql_insert_id
            [532] => mysql_result
            [533] => mysql_num_rows
            [534] => mysql_num_fields
            [535] => mysql_fetch_row
            [536] => mysql_fetch_array
            [537] => mysql_fetch_assoc
            [538] => mysql_fetch_object
            [539] => mysql_data_seek
            [540] => mysql_fetch_lengths
            [541] => mysql_fetch_field
            [542] => mysql_field_seek
            [543] => mysql_free_result
            [544] => mysql_field_name
            [545] => mysql_field_table
            [546] => mysql_field_len
            [547] => mysql_field_type
            [548] => mysql_field_flags
            [549] => mysql_escape_string
            [550] => mysql_real_escape_string
            [551] => mysql_stat
            [552] => mysql_thread_id
            [553] => mysql_client_encoding
            [554] => mysql_ping
            [555] => mysql_get_client_info
            [556] => mysql_get_host_info
            [557] => mysql_get_proto_info
            [558] => mysql_get_server_info
            [559] => mysql_info
            [560] => mysql_set_charset
            [561] => mysql
            [562] => mysql_fieldname
            [563] => mysql_fieldtable
            [564] => mysql_fieldlen
            [565] => mysql_fieldtype
            [566] => mysql_fieldflags
            [567] => mysql_selectdb
            [568] => mysql_freeresult
            [569] => mysql_numfields
            [570] => mysql_numrows
            [571] => mysql_listdbs
            [572] => mysql_listtables
            [573] => mysql_listfields
            [574] => mysql_db_name
            [575] => mysql_dbname
            [576] => mysql_tablename
            [577] => mysql_table_name
            [578] => mysqli_affected_rows
            [579] => mysqli_autocommit
            [580] => mysqli_begin_transaction
            [581] => mysqli_change_user
            [582] => mysqli_character_set_name
            [583] => mysqli_close
            [584] => mysqli_commit
            [585] => mysqli_connect
            [586] => mysqli_connect_errno
            [587] => mysqli_connect_error
            [588] => mysqli_data_seek
            [589] => mysqli_dump_debug_info
            [590] => mysqli_debug
            [591] => mysqli_errno
            [592] => mysqli_error
            [593] => mysqli_error_list
            [594] => mysqli_stmt_execute
            [595] => mysqli_execute
            [596] => mysqli_fetch_field
            [597] => mysqli_fetch_fields
            [598] => mysqli_fetch_field_direct
            [599] => mysqli_fetch_lengths
            [600] => mysqli_fetch_array
            [601] => mysqli_fetch_assoc
            [602] => mysqli_fetch_object
            [603] => mysqli_fetch_row
            [604] => mysqli_field_count
            [605] => mysqli_field_seek
            [606] => mysqli_field_tell
            [607] => mysqli_free_result
            [608] => mysqli_get_charset
            [609] => mysqli_get_client_info
            [610] => mysqli_get_client_version
            [611] => mysqli_get_links_stats
            [612] => mysqli_get_host_info
            [613] => mysqli_get_proto_info
            [614] => mysqli_get_server_info
            [615] => mysqli_get_server_version
            [616] => mysqli_get_warnings
            [617] => mysqli_init
            [618] => mysqli_info
            [619] => mysqli_insert_id
            [620] => mysqli_kill
            [621] => mysqli_more_results
            [622] => mysqli_multi_query
            [623] => mysqli_next_result
            [624] => mysqli_num_fields
            [625] => mysqli_num_rows
            [626] => mysqli_options
            [627] => mysqli_ping
            [628] => mysqli_prepare
            [629] => mysqli_report
            [630] => mysqli_query
            [631] => mysqli_real_connect
            [632] => mysqli_real_escape_string
            [633] => mysqli_real_query
            [634] => mysqli_release_savepoint
            [635] => mysqli_rollback
            [636] => mysqli_savepoint
            [637] => mysqli_select_db
            [638] => mysqli_set_charset
            [639] => mysqli_stmt_affected_rows
            [640] => mysqli_stmt_attr_get
            [641] => mysqli_stmt_attr_set
            [642] => mysqli_stmt_bind_param
            [643] => mysqli_stmt_bind_result
            [644] => mysqli_stmt_close
            [645] => mysqli_stmt_data_seek
            [646] => mysqli_stmt_errno
            [647] => mysqli_stmt_error
            [648] => mysqli_stmt_error_list
            [649] => mysqli_stmt_fetch
            [650] => mysqli_stmt_field_count
            [651] => mysqli_stmt_free_result
            [652] => mysqli_stmt_get_warnings
            [653] => mysqli_stmt_init
            [654] => mysqli_stmt_insert_id
            [655] => mysqli_stmt_num_rows
            [656] => mysqli_stmt_param_count
            [657] => mysqli_stmt_prepare
            [658] => mysqli_stmt_reset
            [659] => mysqli_stmt_result_metadata
            [660] => mysqli_stmt_send_long_data
            [661] => mysqli_stmt_store_result
            [662] => mysqli_stmt_sqlstate
            [663] => mysqli_sqlstate
            [664] => mysqli_ssl_set
            [665] => mysqli_stat
            [666] => mysqli_store_result
            [667] => mysqli_thread_id
            [668] => mysqli_thread_safe
            [669] => mysqli_use_result
            [670] => mysqli_warning_count
            [671] => mysqli_refresh
            [672] => mysqli_escape_string
            [673] => mysqli_set_opt
            [674] => spl_classes
            [675] => spl_autoload
            [676] => spl_autoload_extensions
            [677] => spl_autoload_register
            [678] => spl_autoload_unregister
            [679] => spl_autoload_functions
            [680] => spl_autoload_call
            [681] => class_parents
            [682] => class_implements
            [683] => class_uses
            [684] => spl_object_hash
            [685] => iterator_to_array
            [686] => iterator_count
            [687] => iterator_apply
            [688] => pdo_drivers
            [689] => posix_kill
            [690] => posix_getpid
            [691] => posix_getppid
            [692] => posix_getuid
            [693] => posix_setuid
            [694] => posix_geteuid
            [695] => posix_seteuid
            [696] => posix_getgid
            [697] => posix_setgid
            [698] => posix_getegid
            [699] => posix_setegid
            [700] => posix_getgroups
            [701] => posix_getlogin
            [702] => posix_getpgrp
            [703] => posix_setsid
            [704] => posix_setpgid
            [705] => posix_getpgid
            [706] => posix_getsid
            [707] => posix_uname
            [708] => posix_times
            [709] => posix_ctermid
            [710] => posix_ttyname
            [711] => posix_isatty
            [712] => posix_getcwd
            [713] => posix_mkfifo
            [714] => posix_mknod
            [715] => posix_access
            [716] => posix_getgrnam
            [717] => posix_getgrgid
            [718] => posix_getpwnam
            [719] => posix_getpwuid
            [720] => posix_getrlimit
            [721] => posix_get_last_error
            [722] => posix_errno
            [723] => posix_strerror
            [724] => posix_initgroups
            [725] => session_name
            [726] => session_module_name
            [727] => session_save_path
            [728] => session_id
            [729] => session_regenerate_id
            [730] => session_decode
            [731] => session_encode
            [732] => session_start
            [733] => session_destroy
            [734] => session_unset
            [735] => session_set_save_handler
            [736] => session_cache_limiter
            [737] => session_cache_expire
            [738] => session_set_cookie_params
            [739] => session_get_cookie_params
            [740] => session_write_close
            [741] => session_abort
            [742] => session_reset
            [743] => session_status
            [744] => session_register_shutdown
            [745] => session_commit
            [746] => simplexml_load_file
            [747] => simplexml_load_string
            [748] => simplexml_import_dom
            [749] => socket_select
            [750] => socket_create
            [751] => socket_create_listen
            [752] => socket_create_pair
            [753] => socket_accept
            [754] => socket_set_nonblock
            [755] => socket_set_block
            [756] => socket_listen
            [757] => socket_close
            [758] => socket_write
            [759] => socket_read
            [760] => socket_getsockname
            [761] => socket_getpeername
            [762] => socket_connect
            [763] => socket_strerror
            [764] => socket_bind
            [765] => socket_recv
            [766] => socket_send
            [767] => socket_recvfrom
            [768] => socket_sendto
            [769] => socket_get_option
            [770] => socket_set_option
            [771] => socket_shutdown
            [772] => socket_last_error
            [773] => socket_clear_error
            [774] => socket_import_stream
            [775] => socket_sendmsg
            [776] => socket_recvmsg
            [777] => socket_cmsg_space
            [778] => socket_getopt
            [779] => socket_setopt
            [780] => constant
            [781] => bin2hex
            [782] => hex2bin
            [783] => sleep
            [784] => usleep
            [785] => time_nanosleep
            [786] => time_sleep_until
            [787] => strptime
            [788] => flush
            [789] => wordwrap
            [790] => htmlspecialchars
            [791] => htmlentities
            [792] => html_entity_decode
            [793] => htmlspecialchars_decode
            [794] => get_html_translation_table
            [795] => sha1
            [796] => sha1_file
            [797] => md5
            [798] => md5_file
            [799] => crc32
            [800] => iptcparse
            [801] => iptcembed
            [802] => getimagesize
            [803] => getimagesizefromstring
            [804] => image_type_to_mime_type
            [805] => image_type_to_extension
            [806] => phpinfo
            [807] => phpversion
            [808] => phpcredits
            [809] => php_sapi_name
            [810] => php_uname
            [811] => php_ini_scanned_files
            [812] => php_ini_loaded_file
            [813] => strnatcmp
            [814] => strnatcasecmp
            [815] => substr_count
            [816] => strspn
            [817] => strcspn
            [818] => strtok
            [819] => strtoupper
            [820] => strtolower
            [821] => strpos
            [822] => stripos
            [823] => strrpos
            [824] => strripos
            [825] => strrev
            [826] => hebrev
            [827] => hebrevc
            [828] => nl2br
            [829] => basename
            [830] => dirname
            [831] => pathinfo
            [832] => stripslashes
            [833] => stripcslashes
            [834] => strstr
            [835] => stristr
            [836] => strrchr
            [837] => str_shuffle
            [838] => str_word_count
            [839] => str_split
            [840] => strpbrk
            [841] => substr_compare
            [842] => strcoll
            [843] => money_format
            [844] => substr
            [845] => substr_replace
            [846] => quotemeta
            [847] => ucfirst
            [848] => lcfirst
            [849] => ucwords
            [850] => strtr
            [851] => addslashes
            [852] => addcslashes
            [853] => rtrim
            [854] => str_replace
            [855] => str_ireplace
            [856] => str_repeat
            [857] => count_chars
            [858] => chunk_split
            [859] => trim
            [860] => ltrim
            [861] => strip_tags
            [862] => similar_text
            [863] => explode
            [864] => implode
            [865] => join
            [866] => setlocale
            [867] => localeconv
            [868] => nl_langinfo
            [869] => soundex
            [870] => levenshtein
            [871] => chr
            [872] => ord
            [873] => parse_str
            [874] => str_getcsv
            [875] => str_pad
            [876] => chop
            [877] => strchr
            [878] => sprintf
            [879] => printf
            [880] => vprintf
            [881] => vsprintf
            [882] => fprintf
            [883] => vfprintf
            [884] => sscanf
            [885] => fscanf
            [886] => parse_url
            [887] => urlencode
            [888] => urldecode
            [889] => rawurlencode
            [890] => rawurldecode
            [891] => http_build_query
            [892] => readlink
            [893] => linkinfo
            [894] => symlink
            [895] => link
            [896] => unlink
            [897] => exec
            [898] => system
            [899] => escapeshellcmd
            [900] => escapeshellarg
            [901] => passthru
            [902] => shell_exec
            [903] => proc_open
            [904] => proc_close
            [905] => proc_terminate
            [906] => proc_get_status
            [907] => proc_nice
            [908] => rand
            [909] => srand
            [910] => getrandmax
            [911] => mt_rand
            [912] => mt_srand
            [913] => mt_getrandmax
            [914] => getservbyname
            [915] => getservbyport
            [916] => getprotobyname
            [917] => getprotobynumber
            [918] => getmyuid
            [919] => getmygid
            [920] => getmypid
            [921] => getmyinode
            [922] => getlastmod
            [923] => base64_decode
            [924] => base64_encode
            [925] => password_hash
            [926] => password_get_info
            [927] => password_needs_rehash
            [928] => password_verify
            [929] => convert_uuencode
            [930] => convert_uudecode
            [931] => abs
            [932] => ceil
            [933] => floor
            [934] => round
            [935] => sin
            [936] => cos
            [937] => tan
            [938] => asin
            [939] => acos
            [940] => atan
            [941] => atanh
            [942] => atan2
            [943] => sinh
            [944] => cosh
            [945] => tanh
            [946] => asinh
            [947] => acosh
            [948] => expm1
            [949] => log1p
            [950] => pi
            [951] => is_finite
            [952] => is_nan
            [953] => is_infinite
            [954] => pow
            [955] => exp
            [956] => log
            [957] => log10
            [958] => sqrt
            [959] => hypot
            [960] => deg2rad
            [961] => rad2deg
            [962] => bindec
            [963] => hexdec
            [964] => octdec
            [965] => decbin
            [966] => decoct
            [967] => dechex
            [968] => base_convert
            [969] => number_format
            [970] => fmod
            [971] => inet_ntop
            [972] => inet_pton
            [973] => ip2long
            [974] => long2ip
            [975] => getenv
            [976] => putenv
            [977] => getopt
            [978] => sys_getloadavg
            [979] => microtime
            [980] => gettimeofday
            [981] => getrusage
            [982] => uniqid
            [983] => quoted_printable_decode
            [984] => quoted_printable_encode
            [985] => convert_cyr_string
            [986] => get_current_user
            [987] => set_time_limit
            [988] => header_register_callback
            [989] => get_cfg_var
            [990] => magic_quotes_runtime
            [991] => set_magic_quotes_runtime
            [992] => get_magic_quotes_gpc
            [993] => get_magic_quotes_runtime
            [994] => error_log
            [995] => error_get_last
            [996] => call_user_func
            [997] => call_user_func_array
            [998] => call_user_method
            [999] => call_user_method_array
            [1000] => forward_static_call
            [1001] => forward_static_call_array
            [1002] => serialize
            [1003] =&该学习哪些PHP函数? PHP常用函数?

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