php表单常用正则表达式，代码如下所示：

function is_email($str){ //检验email return preg_match("/^\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/", $str); } function is_url($str){ //检验网址 return preg_match("/^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"]) *$/", $str); } function is_qq($str){ //检验qq return preg_match("/^[1-9]\d{4,8}$/", $str); } function is_zip($str){ //检验邮编 return preg_match("/^[1-9]\d{5}$/", $str); } function is_idcard($str){ //检验身份证 return preg_match("/^\d{15}(\d{2}[A-Za-z0-9])?$/", $str); } function is_chinese($str){ 检验是否是中文 return ereg("^[".chr(0xa1)."-".chr(0xff)."]+$",$str); } function is_english($str){ //检验是否是英文 return preg_match("/^[A-Za-z]+$/", $str); } function is_mobile($str){ //检验是否是手机 return preg_match("/^((\(\d{3}\))|(\d{3}\-))?13\d{9}$/", $str); } function is_phone($str){ //建云那是否是电话 return preg_match("/^((\(\d{3}\))|(\d{3}\-))?(\(0\d{2,3}\)|0\d{2,3}-)?[1-9]\d{6,7}$/", $str); } function is_safe($str){ return (preg_match("/^(([A-Z]*|[a-z]*|\d*|[-_\~!@#\$%\^&\*\.\(\)\[\]\{\}<>\?\\\/\'\"]*)|. {0,5})$|\s/", $str) != 0); } }

PS：下面再给大家分享一段代码

<?php/*** @description: 正则表达式匹配*/class Regex {/*** @手机号*/public static function Phone($subject) {$pattern='/^(0|86|17951)?(13[0-9]|15[012356789]|1[78][0-9]|14[57])[0-9]{8}$/';return Regex::PublicMethod($pattern, $subject);}/*** @数字*/public static function Number($subject) {$pattern='/^[0-9]+$/';return Regex::PublicMethod($pattern, $subject);}/*** @年份 格式：yyyy*/public static function Year($subject) {$pattern='/^(\d{4})$/';return Regex::PublicMethod($pattern, $subject);}/*** @月份 格式:mm*/public static function Month($subject) {$pattern='/^0?([1-9])$|^(1[0-2])$/';return Regex::PublicMethod($pattern, $subject);}/*** @日期 格式：yyyy-mm-dd*/public static function Day($subject) {$pattern='/^(\d{4})-(0?\d{1}|1[0-2])-(0?\d{1}|[12]\d{1}|3[01])$/';return Regex::PublicMethod($pattern, $subject);}/*** @日期时间 格式：yyyy-mm-dd hh:ii:ss*/public static function DateTime($subject) {$pattern='/^(\d{4})-(0?\d{1}|1[0-2])-(0?\d{1}|[12]\d{1}|3[01])\s(0\d{1}|1\d{1}|2[0-3]):[0-5]\d{1}:([0-5]\d{1})$/';return Regex::PublicMethod($pattern, $subject);}/*** @邮箱*/public static function Email($subject) {$pattern='/\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*/';return Regex::PublicMethod($pattern, $subject);}/*** @邮编*/public static function Postcode($subject) {$pattern='/[1-9]\d{5}(?!\d)/';return Regex::PublicMethod($pattern, $subject);}/*** @有效图片地址*/public static function Photo($subject) {$pattern='/\b(([\w-]+:\/\/?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|\/)))/';return Regex::PublicMethod($pattern, $subject);}/*** @URL地址*/public static function UrlAddress($subject) {$pattern='/\b(([\w-]+:\/\/?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|\/)))/';return Regex::PublicMethod($pattern, $subject);}/*** @有效HTTP地址*/public static function EffectiveHttp($subject) {$pattern='/\b(([\w-]+:\/\/?|www[.])[^\s()<>]+(?:\([\w\d]+\)|([^[:punct:]\s]|\/)))/';return Regex::PublicMethod($pattern, $subject);}/*** @身份证*/public static function Identity($subject) {$pattern='/(^\d{15}$)|(^\d{17}([0-9]|X)$)/';return Regex::PublicMethod($pattern, $subject);}/*** @IPv4*/public static function Ipv4($subject) {$pattern='/^(((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))\.){3}((\d{1,2})|(1\d{2})|(2[0-4]\d)|(25[0-5]))$/';return Regex::PublicMethod($pattern, $subject);}/*** @IPv6*/public static function Ipv6($subject) {$pattern='/^([\da-fA-F]{1,4}:){7}[\da-fA-F]{1,4}$/';return Regex::PublicMethod($pattern, $subject);}/*** @匹配正则公共方法*/public static function PublicMethod($pattern, $subject){if(preg_match($pattern, $subject)){return true;}return false;}}

好了，内容就这么多少，希望对大家有所帮助！