一些使用频率比较高的PHP函数
在php开发中,我们经常会遇到一些函数,下面是整理好的,可以直接使用,方便开发效率,不过建议大家一定要先看懂,然后在这个基础上增加功能就提高了自身能力了
1.产生随机字符串函数
function random($length) {$hash = @#@#;$chars = @#abcdefghijklmnopqrstuvwxyz0123456789abcdefghijklmnopqrstuvwxyz@#;$max = strlen($chars) - 1;mt_srand((double)microtime() * 1000000);for($i = 0; $i < $length; $i++) {$hash .= $chars[mt_rand(0, $max)];}return $hash;} |
2.截取一定长度的字符串
注:该函数对gb2312使用有效
function wordscut($string, $length ,$sss=0) {if(strlen($string) > $length) {if($sss){$length=$length - 3;$addstr=@# ...@#;}for($i = 0; $i < $length; $i++) {if(ord($string[$i]) > 127) {$wordscut .= $string[$i].$string[$i + 1];$i++;} else {$wordscut .= $string[$i];}}return $wordscut.$addstr;}return $string;} |
3.取得客户端ip地址
function getip(){if (getenv(http_client_ip) && strcasecmp(getenv(http_client_ip), unknown))$ip = getenv(http_client_ip);else if (getenv(http_x_forwarded_for) && strcasecmp(getenv(http_x_forwarded_for), unknown))$ip = getenv(http_x_forwarded_for);else if (getenv(remote_addr) && strcasecmp(getenv(remote_addr), unknown))$ip = getenv(remote_addr);else if (isset($_server[@#remote_addr@#]) && $_server[@#remote_addr@#] && strcasecmp($_server[@#remote_addr@#], unknown))$ip = $_server[@#remote_addr@#];else$ip = unknown;return($ip);} |
4.创建相应的文件夹
function createdir($dir=@#@#){if (!is_dir($dir)){$temp = explode(@#/@#,$dir);$cur_dir = @#@#;for($i=0;$i |
5.判断邮箱地址
function checkemail($inaddress){return (ereg(^([a-za-z0-9_-])+@([a-za-z0-9_-])+(.[a-za-z0-9_-])+,$inaddress));} |
6.跳转
function gotourl(
|