<?php
class MyClass {
function doSomething() { echo "HELLO WORLD\n"; }
}
$myInstance = null;
$broken = function() use ($myInstance) {
if(!empty($myInstance)) $myInstance->doSomething();
else echo "\$myInstance is empty.\n";
var_dump($myInstance); // NULL
};
$working = function() use (&$myInstance) {
if(!empty($myInstance)) $myInstance->doSomething();
else print "\$myInstance is empty.\n";
};
$myInstance = new MyClass();
$myInstance->doSomething(); // Outputs HELLO WORLD.
$broken(); // Outputs $myInstance is empty. NULL
$working(); // Outputs HELLO WORLD.
- Output for 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
- HELLO WORLD
$myInstance is empty.
NULL
HELLO WORLD
- Output for 4.4.2 - 4.4.9, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17
- Parse error: syntax error, unexpected T_FUNCTION in /in/OYrM9 on line 11
Process exited with code 255. - Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1, 5.0.0 - 5.0.5
- Parse error: parse error, unexpected T_FUNCTION in /in/OYrM9 on line 11
Process exited with code 255. - Output for 4.3.2 - 4.3.4
- Parse error: parse error in /in/OYrM9 on line 11
Process exited with code 255.
preferences:
225.28 ms | 401 KiB | 355 Q