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<?php // Everything you enter here will be executed by our servers. Try it! $array = array(1, 2, 3, '{1}', '{2}', '{3}', '[1]', '[2]', '[3]'); $filtered_array = array_filter( $array, function( $el) { return preg_match( '/^\[\d+\]$/', $el); }); foreach( $filtered_array as $number) echo $number . "\n";
Output for git.master, git.master_jit, rfc.property-hooks
[1] [2] [3]

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