PHP regular expression verification email_PHP tutorial-PHP Tutorial-php.cn

PHP regular expression verification email_PHP tutorial

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Release： 2016-07-13 16:56:45

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Email verification codes are mostly unable to verify one-letter domain names or one-letter usernames, such as: i@fufuok.com or fufu@9.cn. The solution is as follows:

1. Do not judge the total length. You can add the length judgment yourself;

2, supports domain name suffixes such as .net.cn and .com.cn;

3. The email name part starts with a letter or number, and can have "-" and "_" symbols in the middle;

4. The domain name part starts with a letter or number, and there can be "-" and "_" symbols in the middle;

PHP email verification regular expression

Example

The code is as follows

代码如下	复制代码
preg_match("/^[0-9a-zA-Z]+@(([0-9a-zA-Z]+)[.])+[a-z]{2,4}$/i",$email );

Copy code

代码如下

复制代码

/**
* 自己修整的一个邮箱正则表达式
* 琼台博客
*/
echo '';
function c_email($email){
    $reg='/^([a-zA-Z0-9]{1,20})(([_-.])?([a-zA-Z0-9]{1,20}))*@([a-zA-Z0-9]{1,20})(([-_])?([a-zA-Z0-9]{1,20}))*(.[a-z]{2,4}){1,2}$/';
    if(preg_match($reg,$email))
        return true;
    return false;
}
$email = 'mail@lizhong.me';
$check_result = c_email($email);
if($check_result){
    echo '邮箱格式正确';
}else{
    echo '邮箱格式错误';
}

preg_match("/^[0-9a-zA-Z]+@(([0-9a-zA-Z]+)[.])+[a-z]{2,4}$/i", $email );

代码如下

复制代码

class Reg
{
public $mail;
function __construct()
{
$this->mail = $_POST["mail"];
    }
    function RegMail()
    {
        if(preg_match("/^[0-9a-zA-Z]+(?:[_-][a-z0-9-]+)*@[a-zA-Z0-9]+(?:[-.][a-zA-Z0-9]+)*.[a-zA-Z]+$/i", $this->mail))
        {
            echo "";
        }
        else
        {
            echo "";
        }
    }
}
$r = new Reg();
$r->RegMail();
$strings = "abc@163.com";
if(preg_match("/^[0-9a-zA-Z]+(?:[_-][a-z0-9-]+)*@[a-zA-Z0-9]+(?:[-.][a-zA-Z0-9]+)*.[a-zA-Z]+$/i",$strings))
{
    echo"验证成功！是邮箱地址。";
}
else
{
    echo"不是邮箱地址！";
}
?>

The code is as follows

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/** * An email regular expression modified by myself * Qiongtai Blog */ echo ''; function c_email($email){ $reg='/^([a-zA-Z0-9]{1,20})(([_-.])?([a-zA-Z0-9]{1,20}))*@ ([a-zA-Z0-9]{1,20})(([-_])?([a-zA-Z0-9]{1,20}))*(.[a-z]{2, 4}){1,2}$/'; If(preg_match($reg,$email)) return true; Return false; } $email = 'mail@lizhong.me'; $check_result = c_email($email); if($check_result){ echo 'The email format is correct'; }else{ echo 'Email format error'; } Email verification class

The code is as follows

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class Reg<🎜> {<🎜> Public $mail;<🎜> Function __construct()<🎜> {<🎜> $this->mail = $_POST["mail"]; } Function RegMail() { if(preg_match("/^[0-9a-zA-Z]+(?:[_-][a-z0-9-]+)*@[a-zA-Z0-9]+(?:[ -.][a-zA-Z0-9]+)*.[a-zA-Z]+$/i", $this->mail)) { echo ""; } else { echo ""; } } } $r = new Reg(); $r->RegMail(); $strings = "abc@163.com"; if(preg_match("/^[0-9a-zA-Z]+(?:[_-][a-z0-9-]+)*@[a-zA-Z0-9]+(?:[ -.][a-zA-Z0-9]+)*.[a-zA-Z]+$/i",$strings)) { echo "Verification successful! It's the email address."; } else { Echo "Not an email address!"; } ?>