A complete collection of email address verification in php_PHP tutorial

There are various ways to write address verification in PHP. Let me summarize several commonly used email address verification examples. The simplest one is to directly use the regular expression preg_match("/^([a-z0-9\ +_\-]+)(\.[a-z0-9\+_\-]+)*@([a-z0-9\-]+\.)+[a-z]{2,6}$ /ix to verify

CodeIgniter framework email address verification

The code is as follows

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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;     }

/**
     * 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 email regular verification

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); }

The code is as follows	Copy code
/** * Determine whether the email format is correct * @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

代码如下

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/**  * 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 ) < 3 ) { 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 ); }

/**
 * 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 ) < 3 ) {
        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

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);

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); http://www.bkjia.com/PHPjc/631510.html

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http://www.bkjia.com/PHPjc/631510.htmlTechArticle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\+_\-]+)(...