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run code in 300+ PHP versions simultaneously
<?php $a = array("a", "b", "c", "0", "1", 2, 3, array(1, 2, 3), (object)array("a"=>1, "b"=>2, "c"=>3)); $b = array_filter($a, 'is_string'); var_dump($a); var_dump($b);

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