php中email邮件地址验证大全集合_PHP教程-php教程-PHP中文網

php中email邮件地址验证大全集合_PHP教程

WBOY

發布： 2016-07-13 16:57:50

原創

1045 人瀏覽過

在php中地址验证写法各种各样的，下面我来总结几种常用的email地址验证实例，最简单的是直接使用正则表达式preg_match(\"/^([a-z0-9\\+_\\-]+)(\\.[a-z0-9\\+_\\-]+)*@([a-z0-9\\-]+\\.)+[a-z]{2,6}$/ix来验证了。

CodeIgniter框架邮件地址验证

代码如下	复制代码
/** * Valid Email * * @access public * @param string * @return bool / function valid_email($str) { return ( ! preg_match("/^([a-z0-9+_-]+)(.[a-z0-9+_-]+)@([a-z0-9-]+.)+[a-z]{2,6}$/ix", $str)) ? FALSE : TRUE; }

PHPCMS邮件正则验证

代码如下	复制代码
/** * 判断email格式是否正确 * @param $email */ function is_email($email) { return strlen($email) > 6 && preg_match("/^[w-.]+@[w-.]+(.w+)+$/", $email); }

WordPress邮件地址验证函数

代码如下

复制代码

/**
* Verifies that an email is valid.
*
* Does not grok i18n domains. Not RFC compliant.
*
* @since 0.71
*
* @param string $email Email address to verify.
* @param boolean $deprecated Deprecated.
* @return string|bool Either false or the valid email address.
*/
function is_email( $email, $deprecated = false ) {
    if ( ! empty( $deprecated ) )
        _deprecated_argument( __FUNCTION__, '3.0' );

    // Test for the minimum length the email can be
    if ( strlen( $email )         return apply_filters( 'is_email', false, $email, 'email_too_short' );
    }

    // Test for an @ character after the first position
    if ( strpos( $email, '@', 1 ) === false ) {
        return apply_filters( 'is_email', false, $email, 'email_no_at' );
    }

    // Split out the local and domain parts
    list( $local, $domain ) = explode( '@', $email, 2 );

    // LOCAL PART
    // Test for invalid characters
    if ( !preg_match( '/^[a-zA-Z0-9!#$%&'*+/=?^_`{|}~.-]+$/', $local ) ) {
        return apply_filters( 'is_email', false, $email, 'local_invalid_chars' );
    }

    // DOMAIN PART
    // Test for sequences of periods
    if ( preg_match( '/.{2,}/', $domain ) ) {
        return apply_filters( 'is_email', false, $email, 'domain_period_sequence' );
    }

    // Test for leading and trailing periods and whitespace
    if ( trim( $domain, " tnrx0B." ) !== $domain ) {
        return apply_filters( 'is_email', false, $email, 'domain_period_limits' );
    }

    // Split the domain into subs
    $subs = explode( '.', $domain );

    // Assume the domain will have at least two subs
    if ( 2 > count( $subs ) ) {
        return apply_filters( 'is_email', false, $email, 'domain_no_periods' );
    }

    // Loop through each sub
    foreach ( $subs as $sub ) {
        // Test for leading and trailing hyphens and whitespace
        if ( trim( $sub, " tnrx0B-" ) !== $sub ) {
            return apply_filters( 'is_email', false, $email, 'sub_hyphen_limits' );
        }

        // Test for invalid characters
        if ( !preg_match('/^[a-z0-9-]+$/i', $sub ) ) {
            return apply_filters( 'is_email', false, $email, 'sub_invalid_chars' );
        }
    }

    // Congratulations your email made it!
    return apply_filters( 'is_email', $email, $email, null );
}

例自己写的

代码如下	复制代码
$email = "tanklo_--vehy@yahoo.com.cn"; function check_email($email) { $pattern_test = "/([a-z0-9][-_.]?[a-z0-9]+)@([a-z0-9]*[-_]?[a-z0-9]+)+[.][a-z]{2,3}([.][a-z]{2})?/i"; return preg_match($pattern_test,$email); } echo check_email($email);