3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a1=array("a"=>"purple","b"=>"green","c"=>"blue","d"=>"yellow"); $a2=array("a"=>"purple","b"=>"orange"); array_splice($a1,0,1,$a2); print_r($a1);
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 - 7.1.20, 7.2.0 - 7.2.33, 7.3.12 - 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
Array ( [0] => purple [1] => orange [b] => green [c] => blue [d] => yellow )
preferences:
233.45 ms | 405 KiB | 314 Q