> * 輸出() `void echo ( string $arg1 [, string $... ] )` > * 打印() `bool print_r ( mixed $expression [, bool $return ] )` > * 設置常量() `bool define ( string $name , mixed $value [, bool $case_insensitive = false ] )` > * 移除變量() `void unset ( mixed $var [, mixed $... ] )` > * 引用(`文件路徑 string`) `include()` > * 引用一次(`文件路徑 string`) `include_once()` > * 播隨機數種子() `void srand ([ int $seed ] )` > * 取更好的隨機數() `int mt_rand ( int $min , int $max )` > * 播下更好隨機數種子() `void mt_srand ([ int $seed ] )` > * 結束() `void exit ([ string $status ] )` > * 調試() `void var_dump ( mixed $expression [, mixed $... ] )` > * 取隨機數() `int rand ( int $min , int $max )` > * 單向字符單列() `string crypt ( string $str [, string $salt ] )` > * 規范化路徑() `string realpath ( string $path )` > * sha散列值() `string sha1 ( string $str [, bool $raw_output = false ] )` > * 執行正則() `int preg_match ( string $pattern , string $subject [, array &$matches [, int $flags = 0 [, int $offset = 0 ]]] )` > * 執行全局正則() `int preg_match_all ( string $pattern , string $subject [, array &$matches [, int $flags = PREG_PATTERN_ORDER [, int $offset = 0 ]]] )` > * 執行正則替換() `mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )` > * 執行正則替換并回調() `mixed preg_replace_callback ( mixed $pattern , callable $callback , mixed $subject [, int $limit = -1 [, int &$count ]] )` > * 取時間戳() `time()` > * 取日期() `string date ( string $format [, int $timestamp ] )` > * 取當前路徑() `__FILE__` > * 取當前行號() `__LINE__` > * 取當前目錄() `__DIR__` > * 取當前方法名() `__FUNCTION__` > * 取當前類名() `__CLASS__`