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<?php function array_key_match($target, $match) { $targetKeys = array_keys($target); $diff = array_diff($target, $match); return ($diff == array_diff($diff, $match)); } function test($target, $match, $expect) { return preg_replace('/\n/', '', sprintf( "Target %s, Match %s: %s\n", print_r($target, true), print_r($match, true), (array_key_match($target, $match) == $expect) ? 'true' : 'false' )); } print test([1, 2, 3, 4, 5], [2, 3], true); print test(['a', 'b', 'c'], ['c', 'b'], true); print test([1, 2, 3, 4, 5], [4, 5, 6], false);
Output for git.master, git.master_jit, rfc.property-hooks
Target Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5), Match Array( [0] => 2 [1] => 3): trueTarget Array( [0] => a [1] => b [2] => c), Match Array( [0] => c [1] => b): trueTarget Array( [0] => 1 [1] => 2 [2] => 3 [3] => 4 [4] => 5), Match Array( [0] => 4 [1] => 5 [2] => 6): false

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