PHP 表单验证 - 电子邮件验证

Posted 2021-05-14

// Use this
$email_is_valid = valid_email($email, $db);

// Function
function valid_email ($email, $db) {
	
	$r_email = $db->prepare('SELECT COUNT(id) FROM inscriptions WHERE email = ?');
	$r_email->execute(array($email));
	$r_email_count = $r_email->fetchAll();
	
	if ($r_email_count[0][0] == 0):
		
		if (!filter_var($email, FILTER_VALIDATE_EMAIL)):
			return true;
		else:
			return false;
		endif;		
		
	else:
		return true;
	endif;
}