3v4l.org

run code in 500+ PHP versions simultaneously
<?php $rows = [ [ 'x' => 1 ] ]; foreach ( (array) $rows as &$row ) { $row['y'] = 2; } echo json_encode( $rows ) . PHP_EOL;
Output for 8.2.31 - 8.2.32, 8.3.0 - 8.3.32, 8.4.1 - 8.4.23, 8.5.0 - 8.5.8
[{"x":1}]
preferences:
41.11 ms | 762 KiB | 4 Q