php常用函数

常用函数

预定义的超全局数组变量

$_SRVER $_ENV $_GET $_POST $_REQUEST $_FILES $_COOKIE $_SESSION $GLOBALS 数组相关处理函数

array_values() array_keys() in_array() array_search() array_key_exits() isset()

array_flip() array_reverse()

var_dump() foeach(){} list() each() current() key() next() prev() end() reset()

count()

array_count_values() array_unique()

array_fiter() array_walk()

error_reporting() array_map()

sort()

rsort usort() asort() asrort() uasort() ksort() krsort() uksort() natsort()

natcassesort() array_multisort()

array_slice() array_aplice() array_combine() array_merge() array_intersect() array_diff() array_push() array_pop() array_rand() shuffle() array_sum() range()

字符串常用函数

echo() print() die() printf() sprintf()

ltrim() rtrim() trim() str_pad() strtoupper() strtower() ucfirst() ucwords() n12br()

htmlentities() htmlspecialchars() stripslashes()

strip_tags() number_format() strrev() md5()

strnatcmp() strcmp() strcasecmp()

strstr() strpos() strrpos() substr()

str_replace() explode() implode() 正则

preg_match() preg_match_all() preg_replace() preg_split() preg_grep()

preg_replace_callback() 文件处理

is_file() is_dir() is_link() file_exists() filesize() is_readable() is_writable() is_executable() filectime() filemtime() fileatime() stat()

clearstatcache()

basename() dirname() pathinfo()

opendir()

readdir() closedir() rewinddir() glob() exec() system()

mkdir() rmdir() unlink() copy()

fopen() fclose() fwrite()

file_put_contents() fputs()

fread()

file_get_contents() fgets() fgetc() file() readfile() ftell() unlink() ftruncate() rename()

file_uploads menory_limit

upload_max_filesize post_max_size upload_tmp_dir

$_FILES[][‘neme’] $_FILES[][‘size’] $_FILES[][‘tmp_name’] $_FILES[][‘error’] $_FILES[][‘type’]

is_uploaded_file() move_uploaded_file()

header(‘content-type:image/gif’)

header(‘content-disposition:attachment;filename=”test.gif”’) header(‘content-length:’.filesize(1024)) readfile($s)

mysql数据库 COUNT() SUM() AVG() MAX() MIN()

mysql_fetch_row() mysql_fetch_assoc() mysql_fetch_array() mysql_fetch_object() mysql_free_result() mysql_num_fields() mysql_fecth_field()