Created
January 27, 2013 11:51
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Check email - from stackover
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function check_email_address($email) { | |
// First, we check that there's one @ symbol, and that the lengths are right | |
if (!preg_match("/^[^@]{1,64}@[^@]{1,255}$/", $email)) { | |
// Email invalid because wrong number of characters in one section, or wrong number of @ symbols. | |
return false; | |
} | |
// Split it into sections to make life easier | |
$email_array = explode("@", $email); | |
$local_array = explode(".", $email_array[0]); | |
for ($i = 0; $i < sizeof($local_array); $i++) { | |
if (!preg_match("/^(([A-Za-z0-9!#$%&'*+\/=?^_`{|}~-][A-Za-z0-9!#$%&'*+\/=?^_`{|}~\.-]{0,63})|(\"[^(\\|\")]{0,62}\"))$/", $local_array[$i])) { | |
return false; | |
} | |
} | |
if (!preg_match("/^\[?[0-9\.]+\]?$/", $email_array[1])) { // Check if domain is IP. If not, it should be valid domain name | |
$domain_array = explode(".", $email_array[1]); | |
if (sizeof($domain_array) < 2) { | |
return false; // Not enough parts to domain | |
} | |
for ($i = 0; $i < sizeof($domain_array); $i++) { | |
if (!preg_match("/^(([A-Za-z0-9][A-Za-z0-9-]{0,61}[A-Za-z0-9])|([A-Za-z0-9]+))$/", $domain_array[$i])) { | |
return false; | |
} | |
} | |
} | |
return true; | |
} |
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