PHP常用正则验证

手机号，身份证，ip验证

//正则验证手机号 正确返回 truefunction preg_mobile($mobile) { ???if(preg_match("/^1[34578]\d{9}$/", $mobile)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证电话号码function preg_tel($tel) { ???if(preg_match("/^(\(\d{3,4}\)|\d{3,4}-)?\d{7,8}$/", $tel)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证身份证号（15位或18位数字）function preg_idcard($idcard) { ???if(preg_match("/^\d{15}|\d{18}$/", $idcard)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证是否是数字(这里小数点会认为是字符)function preg_digit($digit) { ???if(preg_match("/^\d*$/", $digit)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证是否是数字(可带小数点的数字)function preg_num($num) { ???if(is_numeric($num)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证由数字、26个英文字母或者下划线组成的字符串function preg_str($str) { ???if(preg_match("/^\w+$/", $str)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证用户密码(以字母开头，长度在6-18之间，只能包含字符、数字和下划线)function preg_password($str) { ???if(preg_match("/^[a-zA-Z]\w{5,17}$/", $str)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证汉字function preg_chinese($str) { ???if(preg_match("/^[\u4e00-\u9fa5],{0,}$/", $str)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证Email地址function preg_email($email) { ???if(preg_match("/^\w+[-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*$/", $email)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证网址URLfunction preg_link($url) { ???if(preg_match("/http:\/\/[\w.]+[\w\/]*[\w.]*\??[\w=&\+\%]*/is", $url)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//腾讯QQ号function preg_qq($qq) { ???if(preg_match("/^[1-9][0-9]{4,}$/", $qq)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证中国邮政编码 6位数字function preg_post($post) { ???if(preg_match("/^[1-9]\d{5}(?!\d)$/", $post)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}//验证IP地址function preg_ip($ip) { ???if(preg_match("/^[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}$/", $ip)) { ???????return TRUE; ???} else { ???????return FALSE; ???}}

PHP常用正则验证

原文地址：https://www.cnblogs.com/qixidi/p/10199693.html