Я упаковал часть своего кода в функцию.Но когда я пытаюсь запустить функцию, появляется ошибка:
Неустранимая ошибка: вызов неопределенной функции qualityCheck ()
Вот мой код:
//include our db file to make a connection to the mysql db
require_once 'db.php';
//our form is providing us with the value of the input field called username through the GET method
//we store it in the variable $regname
$regname = htmlspecialchars($_GET['username']);
$regmail = htmlspecialchars($_GET['email']);
if (strlen($regname)<5) {
echo "Username must be at least 5 characters";
} else {
qualityCheck($regname);
function qualityCheck($qcName) {
//rules for username
$pattern = "^[a-z0-9_-]{5,20}$";
//first we check that the username fits the rules
if (preg_match($pattern, $qcName)) {
//if quality check is pass, wemake a mysql db query and select all rows from table users with the same username as the one
//that is intended to be used by the registree if the mysql query returns a value then it means
//that the username exists already and so we must echo an error message back to the form
$result = mysqli_query($dblink, "SELECT * FROM users WHERE `username` = '$regname'")
or die(mysqli_error($dblink));
if ((mysqli_affected_rows($dblink)) > 0 ) {
echo "Username taken already";
} else {
echo "Username available";
}
} else {
//if username fails the quality check
echo "Username must consist of A-Z and 0-9";
}
}
}