3v4l.org

run code in 300+ PHP versions simultaneously
<?php $values = array( 'foo' => 10, 'bar' => 20, 'baz' => 30 ); $newarray = array(); foreach($values as $k => $v) { $newarray[$k] = $v; if($k == 'bar') $newarray['qux'] = 21; } echo implode(' ', $newarray);
Output for 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.26, 8.0.0 - 8.0.13, 8.1rc1 - rc3
10 20 21 30

preferences:
47.98 ms | 461 KiB | 5 Q