3v4l.org

run code in 300+ PHP versions simultaneously
<?php $x = array( "one" => 1, 2 => 1, "three" => 1, "four" => 1, 5 => 1 ); foreach($x as $key => $y){ $x[$key]=$y+1; } var_dump($x);

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72.68 ms | 402 KiB | 5 Q