PHP Regular Method to Verify Email_PHP Tutorial

Method of PHP regular verification of Email

This article describes the method of PHP regular verification of Email. Share it with everyone for your reference. The details are as follows:

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function 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 > 64) { // 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 two consecutive dots $isValid = false; } else if (!preg_match('/^[A-Za-z0-9\-\.] $/', $domain)) { // character not valid in domain part $isValid = false; } else if (preg_match('/\.\./', $domain)) { // domain part has two consecutive dots $isValid = false; } else if(!preg_match('/^(\.|[A-Za-z0-9!#%&`_=\/$'* ?^{}|~.-]) $/', str_replace("\","",$local))) { // character not valid in local part unless // local part 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; } ?>

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<🎜>function 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 > 64) { // 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 two consecutive dots $isValid = false; } else if (!preg_match('/^[A-Za-z0-9\-\.] $/', $domain)) { // character not valid in domain part $isValid = false; } else if (preg_match('/\.\./', $domain)) { // domain part has two consecutive dots $isValid = false; } else if(!preg_match('/^(\\.|[A-Za-z0-9!#%&`_=\/$'* ?^{}|~.-]) $/' , str_replace("\\","",$local))) { // character not valid in local part unless // local part 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; } ?>

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http://www.bkjia.com/PHPjc/1017144.htmlwww.bkjia.comtruehttp: //www.bkjia.com/PHPjc/1017144.htmlTechArticleMethod of PHP Regular Verification Email This article describes the method of PHP Regular Verification Email. Share it with everyone for your reference. The details are as follows: ? 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 1...