3v4l.org

run code in 300+ PHP versions simultaneously
<?php $a = [ "0" => "Integer index", "03" => "Integer index with leading 0", "2b" => "waifu", "02 " => "trash waifu", " 1" => "I'm running out of ideas", "5.5" => "Float", ]; $str = "Hello"; var_dump($a); var_dump($str["003"]); var_dump($str["3"]);
Output for 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 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
array(6) { [0]=> string(13) "Integer index" ["03"]=> string(28) "Integer index with leading 0" ["2b"]=> string(5) "waifu" ["02 "]=> string(11) "trash waifu" [" 1"]=> string(24) "I'm running out of ideas" ["5.5"]=> string(5) "Float" } string(1) "l" string(1) "l"
preferences:
105.49 ms | 1545 KiB | 4 Q