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check for E-Mail
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<?php | |
/** | |
* checkEmail | |
* | |
* @param String $email | |
* @param Boolean $mxCheck (do not use, if you don't need it) | |
* | |
* @return Boolean | |
*/ | |
function checkEmail($email, $mxCheck = false) | |
{ | |
if (!is_string($email) || strlen($email) >= 320) { | |
$valid = false; | |
} elseif (!preg_match('/^(.*<?)(.*)@(.*)(>?)$/', $email, $matches)) { | |
$valid = false; | |
} else { | |
$domain = $matches[3]; | |
if (function_exists('idn_to_ascii')) { | |
$email = $matches[1] . $matches[2] . '@' . idn_to_ascii($domain) . $matches[4]; | |
} else { | |
$email = $matches[1] . $matches[2] . '@' . $domain . $matches[4]; | |
} | |
if (!$domain || !$email) { | |
$valid = false; | |
} else { | |
if (function_exists('filter_var') && function_exists('idn_to_ascii')) { | |
if (!filter_var($email, FILTER_VALIDATE_EMAIL)) { | |
$valid = false; | |
} else { | |
$valid = true; | |
} | |
} else { | |
if (function_exists('idn_to_ascii')) { | |
$regEx = "/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([a-z0-9]{1}[a-z0-9\-]{0,62}[a-z0-9]{1})|[a-z])\.)+[a-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i"; | |
} else { | |
$regEx = "/^([\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+\.)*[\w\!\#$\%\&\'\*\+\-\/\=\?\^\`{\|\}\~]+@((((([öäüa-z0-9]{1}[öäüa-z0-9\-]{0,62}[öäüa-z0-9]{1})|[öäüa-z])\.)+[öäüa-z]{2,6})|(\d{1,3}\.){3}\d{1,3}(\:\d{1,5})?)$/i"; | |
} | |
if (!preg_match($regEx, $email)) { | |
$valid = false; | |
} else { | |
$valid = true; | |
} | |
} | |
if ($valid && $mxCheck && function_exists('checkdnsrr')) { | |
$valid = checkdnsrr($domain . '.', 'MX') || checkdnsrr($domain, 'A'); | |
} | |
} | |
} | |
return $valid; | |
} |
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