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run code in 300+ PHP versions simultaneously
<?php $a = array ( 0 => 'book1.pdf', 1 => 'book11.pdf', 2 => 'book12.pdf', 3 => 'book2.pdf' ) ; sort($a); print_r($a);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => book1.pdf [1] => book11.pdf [2] => book12.pdf [3] => book2.pdf )

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