php 正则验证输入方法集合,带有防注入性质

<?php
/*过滤验证方法集合*/
/* 转义可能引起sql注入的特殊字符.
$string 需要转移的字符串;
$forece 是否强制转换
#string 转后的字符串.
*/
$magic_quotes_gpc = get_magic_quotes_gpc();
function tdsql($string, $force = 0) {
if(!$GLOBALS['magic_quotes_gpc'] || $force) {
if(is_array($string)) {
foreach($string as $key => $val) {
$string[$key] = tdsql($val, $force); 
}
} else {
$string = addslashes($string);
}
}
return $string;
}

/*验证是否email
string 需要验证的字符串
# boolen 符合email格式返回true,不符合返回false
*/
function  is_email($string){if (preg_match("/^[\\w-]+(\\.[\\w-]+)*@[\\w-]+(\\.[\\w-]+)+$/",$string)) { return true;} else{return false;}}
/*验证是否url
string 需要验证的字符串是否url
# 是返回true
*/
function is_url($string){if(preg_match("/^[\\w-]+://(\\w+(-\\w+)*)(\\.(\\w+(-\\w+)*))*(\\?\\S*)?$/",$string)){return true;}else{return false;}}

function is_num($str){return is_numeric($str);}
function is_chinese($string){if(preg_match("/[^\\x00-\\xff]/",$string)){return true;}else{return false;}}
function is_qq($string){if(preg_match('/^(\\d{5,10})$/',$string)){return true;}else{return false;};}
/*安全字符串,就是只含有英文数字和_*/
function is_safe_str($string){if(preg_match("/^\\w+$/",$string)){return true;}else{return false;}}
/*用户名串只有中英文和数字 6到21字节*/
function is_username($string){if(preg_match("/^[\\x{4e00}-\\x{9fa5}a-zA-Z0-9]{6,21}$/u",$string)){return true;}else{return false;}}
/*密码字符串可以含有部分特殊字符的的 4-18位*/
function is_passwd($string){if(preg_match("/^[\\@A-Za-z0-9\\!\\#\\$\\%\\^\\&\\*\\.\\~]{6,22}$/",$string)){return true;}else{return false;}}
/*中国身份证*/
function is_shenfenzheng($string){if(preg_match("/^(\\d{18}|\\d{15}|\\d{17}x)$/",$string)){return true;}else{return false;}}
/*手机号码 11位简单判断*/
function is_phone($string){if(preg_match("/^\\d{11}$/",$string)){return true;}else{return false;}}
/*移动手机号码*/
function is_phone_yd($string){if(preg_match("/^[134-139,147,150-152,157-159,181-183,187-188]\\d{9}$/",$string)){return true;}else{return false;}}
/*联通手机号码*/
function is_phone_lt($string){if(preg_match("/^[130-132,155,156,185,186]\\d{9}$/",$string)){return true;}else{return false;}}
/*电信手机号码*/
function is_phone_dx($string){if(preg_match("/^[133,153,180,189]\\d{9}$/",$string)){return true;}else{return false;}}
/*固定电话*/
function is_telphone($string){if(preg_match("/^(\\(\\d{3,4}\\)|\\d{3,4}-|\\s)?\\d{8}$/",$string)){return true;}else{return false;}}
/*验证URL 是否来自本站*/
if(isset($_GET['url'])){if(!is_myurl($_GET['url'])){$_GET['url']="http://".$_SERVER['HTTP_HOST']."/";}}
function is_myurl($string){$arr_url = parse_url($string);if($arr_url['host'] == $_SERVER['HTTP_HOST']){return true;}else{return false;}}
/*用户名可以含有中文*/
function is_username_cn($string){if(preg_match("/^(?!_|\\s\\')[A-Za-z0-9_\\x80-\\xff\\s\\']{6,27}$/",$string)){return true;}else{return false;};}

?>
//该片段来自于http://outofmemory.cn