php正则实现表单验证

<?php/* ???preg_grep函数只会去做匹配的操作，不做替换 ???preg_match() 函数用于进行正则表达式匹配，成功返回 1 ，否则返回 0 。 ???preg_match_all() 函数用于进行正则表达式全局匹配，成功返回整个模式匹配的次数（可能为零），如果出错返回 FALSE 。*/$username = $_POST[‘username‘];$pwd = $_POST[‘pwd‘];$pwd_r = $_POST[‘pwd_r‘];$sex = $_POST[‘sex‘];$email = $_POST[‘email‘];$city = $_POST[‘city‘];$phone = $_POST[‘phone‘];$tel = $_POST[‘tel‘];$card = $_POST[‘card‘];$qq = $_POST[‘qq‘];$desc = $_POST[‘desc‘];if(preg_match(‘/^[a-zA-Z]\w{4,9}$/‘,$username) == 0){ ???die(‘用户名不合法‘);}if(preg_match(‘/^\w{6,}$/‘, $pwd) == 0){ ???die(‘密码不合法‘);}if($pwd_r !== $pwd){ ???die(‘密码不一致‘);}if($sex==null){ ???die(‘必选一项性别‘);}if(preg_match(‘/^\w+@+\w{2,4}(\.)(?:com|cn|net)$/‘, $email) == 0){ ???die(‘邮箱不合法‘);}if($city == null){ ???die(‘城市不合法‘);}if(preg_match(‘/^1(?:5|3|8)\d{9}$/‘, $phone) == 0){ ???die(‘手机号不合法‘);}if(preg_match(‘/^\d{3}(\-)\d{8}$/‘, $tel) == 0){ ???die(‘座机号不合法‘);}if(preg_match(‘/(^\d{15}$)|(^\d{18}$)|(^\d{17}(\d|X|x)$)/‘,$card) == 0){ ???die(‘身份证号码不合法‘);}if(preg_match(‘/^\d{8,11}$/‘, $qq) == 0){ ???die(‘qq不合法‘);}
//中文if(preg_match(‘/^[\x{4e00}-\x{9fa5}]{1,20}+$/u‘, $desc) == 0){ ???die(‘自我介绍不合法‘);}//继续我们的操作