3v4l.org

run code in 300+ PHP versions simultaneously
<?php $oldArray = range('a','e'); $newArray = array(); $len = count($oldArray); for($i = 0; $i < count($oldArray); $i+=2){ $key = $oldArray[$i]; $val = $i+1 < $len ? $oldArray[$i+1] : ''; $newArray[$key] = $val; }
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, 5.6.8 - 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
preferences:
255.36 ms | 406 KiB | 355 Q