PHP Regular Verification Email method, PHP verification Email Method _php Tutorial

PHP validation Email method, PHP authentication Email method

This article describes the PHP regular verification email method. Share to everyone for your reference. Specific as follows:

<?phpfunction Validateemail ($email) {$isValid = true;  $atIndex = Strrpos ($email, "@");  if (Is_bool ($atIndex) &&! $atIndex) {$isValid = false;   } else {$domain = substr ($email, $atIndex + 1);   $local = substr ($email, 0, $atIndex);   $localLen = strlen ($local);   $domainLen = strlen ($domain);   if ($localLen < 1 | | $localLen >) {//Local part length exceeded $isValid = false;   } else if ($domainLen < 1 | | $domainLen > 255) {//Domain part length exceeded $isValid = false;   } else if ($local [0] = = '. ' | | $local [$localLen-1] = = '. ')     {//Local part starts or ends with '. '   $isValid = false;   } else if (Preg_match ('/\\.\\./', $local)) {//Local part has both consecutive dots $isValid = false; } else if (!preg_match ('/^[a-za-z0-9\\-\\.   +$/', $domain)) {//character not valid on domain part $isValid = false; } else if (Preg_match ('/\\.\\./', $domain)) {//Domain part had both consecUtive dots $isValid = false; } else if (!preg_match ('/^ (\\\\.| [a-za-z0-9!#%& ' _=\\/$\ ' *+?^{}|~.-])     +$/', Str_replace ("\\\\", "", $local))) {//character not valid on local part unless//local-is quoted if (!preg_match ('/^ "(\\\\" |[     ^ "]) +" $/", Str_replace (" \\\\ "," ", $local))) {$isValid = false; }} if ($isValid &&! ( CHECKDNSRR ($domain, "MX") | |   CHECKDNSRR ($domain, "A"))) {//Domain not found in DNS $isValid = false; }} return $isValid;}? >

I hope this article is helpful to everyone's PHP programming.

http://www.bkjia.com/PHPjc/1017293.html www.bkjia.com true http://www.bkjia.com/PHPjc/1017293.html techarticle PHP Validation Email method, PHP Authentication Email Method This article describes the PHP regular verification email method. Share to everyone for your reference. Specific as follows: Phpfunction validateemail ...

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