instanceof Expect Objects¶
PHP used to report a fatal error when provided with a value that is not an object. After PHP 7.3, it would return false in such case, and not break the execution.
PHP code¶
<?php
var_dump(null instanceof Countable);
function foo() : ?X { /**/ }
var_dump(foo() instanceof Countable); // possible error when foo() returns null
?>
Before¶
PHP Fatal error: instanceof expects an object instance, constant given
Fatal error: instanceof expects an object instance, constant given
After¶
bool(false)
PHP version change¶
This behavior changed in 7.3
