3v4l.org

run code in 300+ PHP versions simultaneously
<?php $arr = array( 'I_Am_The_Key' => 201983029183902138, 'I_Am_The_Key' => 'what does the fox say', 'Another_Key' => 834095893405809348 ); //var_dump($arr); foreach($arr as $k => $v){ echo '$k => ' . '$v' . "\r\n"; }
Output for 4.3.0 - 4.3.11, 4.4.0 - 4.4.9, 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 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 - 7.1.25, 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 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
$k => $v $k => $v
preferences:
246.62 ms | 406 KiB | 329 Q