> * 输出() `void echo ( string $arg1 [, string $... ] )` > * 打印() `bool print_r ( mixed $expression [, bool $return ] )` > * 设置常量() `bool define ( string $name , mixed $value [, bool $case_insensitive = false ] )` > * 移除变量() `void unset ( mixed $var [, mixed $... ] )` > * 引用(`文件路径 string`) `include()` > * 引用一次(`文件路径 string`) `include_once()` > * 播随机数种子() `void srand ([ int $seed ] )` > * 取更好的随机数() `int mt_rand ( int $min , int $max )` > * 播下更好随机数种子() `void mt_srand ([ int $seed ] )` > * 结束() `void exit ([ string $status ] )` > * 调试() `void var_dump ( mixed $expression [, mixed $... ] )` > * 取随机数() `int rand ( int $min , int $max )` > * 单向字符单列() `string crypt ( string $str [, string $salt ] )` > * 规范化路径() `string realpath ( string $path )` > * sha散列值() `string sha1 ( string $str [, bool $raw_output = false ] )` > * 执行正则() `int preg_match ( string $pattern , string $subject [, array &$matches [, int $flags = 0 [, int $offset = 0 ]]] )` > * 执行全局正则() `int preg_match_all ( string $pattern , string $subject [, array &$matches [, int $flags = PREG_PATTERN_ORDER [, int $offset = 0 ]]] )` > * 执行正则替换() `mixed preg_replace ( mixed $pattern , mixed $replacement , mixed $subject [, int $limit = -1 [, int &$count ]] )` > * 执行正则替换并回调() `mixed preg_replace_callback ( mixed $pattern , callable $callback , mixed $subject [, int $limit = -1 [, int &$count ]] )` > * 取时间戳() `time()` > * 取日期() `string date ( string $format [, int $timestamp ] )` > * 取当前路径() `__FILE__` > * 取当前行号() `__LINE__` > * 取当前目录() `__DIR__` > * 取当前方法名() `__FUNCTION__` > * 取当前类名() `__CLASS__`