PHP object property false evaluation with operator "=="

Asked Jan 18 '22 at 21:53

Active Jan 18 '22 at 21:53

Viewed 16 times

Can somebody explain this? (PHP Version 7.2.18)

$data = new stdClass(); 
$data->status = 0;
print($data->status == "foo"); //true
print($data->status === "foo"); //false

asked Jan 18 '22 at 21:53

David

1

The first one is converting `"foo"` to a number. This returns `0` because there are no digits, so it's equal to `$data->status`. – Barmar Jan 18 '22 at 21:56
1

This has nothing to do with object properties, it would be the same with `$data = 0` and `print($data == "foo")` – Barmar Jan 18 '22 at 21:56
https://www.php.net/manual/en/language.types.type-juggling.php – M. Eriksson Jan 18 '22 at 21:57
1

Note that this has changed in PHP 8, both will return `false` there. – rickdenhaan Jan 18 '22 at 22:00
1

See [Loose comparison table](https://www.php.net/manual/en/types.comparisons.php#types.comparisions-loose). – Ruslan Osmanov Jan 18 '22 at 22:01

0 Answers0