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<?php $array = ["post: 746", "post: 2", "post: 84"]; var_export(array_map(function($v){return filter_var($v, FILTER_SANITIZE_NUMBER_INT);}, $array)); // remove all non-integer characters var_export(preg_replace('~^post: ~', '', $array, 1)); // only necessary if you have non-"post: " substrings var_export(array_map(function($v){return trim($v, ': opst');}, $array)); // I shuffled the character mask to prove order doesn't matter
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => '746', 1 => '2', 2 => '84', )array ( 0 => '746', 1 => '2', 2 => '84', )array ( 0 => '746', 1 => '2', 2 => '84', )

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