How can I check if my object has returned false or not? I have the following class:
class Test {
public function __construct($number) {
if($number != '1') {
return FALSE;
}
}
}
I've tried:
$x = new Test('1');
$x = new Test('2');
But when I var_dump($x), I get the same results. I want to do a:
if(! $x = new Test('1')) {
header("location: xxx...");
}
You cannot return anything from a constructor. If you want the construction of an object to fail, you'll have to throw an Exception.
As deceze said, constructors cannot return a value. You could create a factory method that returns false, like:
class Test
{
public function __construct($number) {
...
}
public function factory($number) {
return ($number != '1') ? false : new self($number);
}
}
$x = Test::factory('1');
if (!$x) {
header('Location: ...');
}
But I would use exceptions instead
class Test
{
public function __construct($number) {
if ($number != '1') {
throw new IllegalArgumentException('Number must be "1"');
}
...
}
}
try {
$x = new Test('1');
} catch (Exception $e) {
header('Location: ...');
}
catch any and all exceptions simply because they may be thrown. Exceptions are, as the name says, exceptional circumstances which should never happen. If they do happen, it's because there's an error in your application, which is why you're declaring an exceptional situation. Don't use exceptions for normal "may or may not happen" circumstances, most exceptions should specifically not be caught, especially in a trivial case like this.