/** * Check email address validity * @param strEmailAddress Email address to be checked * @return True if email is valid, false if not */ public static function check_email_address($strEmailAddress) { // If magic quotes is "on", email addresses with quote marks will // fail validation because of added escape characters. Uncommenting // the next three lines will allow for this issue. //if (get_magic_quotes_gpc()) { // $strEmailAddress = stripslashes($strEmailAddress); //} // Control characters are not allowed if (preg_match('/[\\x00-\\x1F\\x7F-\\xFF]/', $strEmailAddress)) { return false; } // Split it into sections using last instance of "@" $intAtSymbol = strrpos($strEmailAddress, '@'); if ($intAtSymbol === false) { // No "@" symbol in email. return false; } $arrEmailAddress[0] = substr($strEmailAddress, 0, $intAtSymbol); $arrEmailAddress[1] = substr($strEmailAddress, $intAtSymbol + 1); // Count the "@" symbols. Only one is allowed, except where // contained in quote marks in the local part. Quickest way to // check this is to remove anything in quotes. $arrTempAddress[0] = preg_replace('/"[^"]+"/', '', $arrEmailAddress[0]); $arrTempAddress[1] = $arrEmailAddress[1]; $strTempAddress = $arrTempAddress[0] . $arrTempAddress[1]; // Then check - should be no "@" symbols. if (strrpos($strTempAddress, '@') !== false) { // "@" symbol found return false; } // Check local portion if (!EmailAddressValidatorUtil::check_local_portion($arrEmailAddress[0])) { return false; } // Check domain portion if (!EmailAddressValidatorUtil::check_domain_portion($arrEmailAddress[1])) { return false; } // If we're still here, all checks above passed. Email is valid. return true; }