php中email邮件地址验证大全集合

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
$email = "[e-mail]"; function check_email($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);