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run code in 300+ PHP versions simultaneously
<?php $_POST['site'] = [1, 2, 3, '4foo', '5bar']; $sites = array_map(function ($val) { return filter_var($val, FILTER_SANITIZE_NUMBER_INT); }, $_POST['site']); print_r($sites);
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5 )

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