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<?php $foo = [ 244 => ['test'], 254 => null ]; $bar = array_filter($foo, 'is_null'); $baz = array_diff($foo, $bar); var_dump($baz);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Array to string conversion in /in/ALrqR on line 9 array(1) { [244]=> array(1) { [0]=> string(4) "test" } }

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