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run code in 300+ PHP versions simultaneously
<?php $a = array( "one" => 1, "two" => 2, "three" => 3, "seventeen" => 17 ); foreach ($a as $k) { echo "\$a[$k] .\n"; }
Output for git.master, git.master_jit, rfc.property-hooks
$a[1] . $a[2] . $a[3] . $a[17] .

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