- Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 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 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
- string(1) "a"
- Output for 5.5.0 - 5.5.36, 5.6.0 - 5.6.28
- NULL
<?php
$var = [
'a' => 'a',
'b' => 'b',
];
foreach ($var as $value) {
}
var_dump(key($var));