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<?php $struct = [ 'a1' => [ 'atr' => 'atr_a1' , 'form' => 'form_a1'], 'a1_2' => [ 'atr' => 'atr_a1' , 'form' => 'form_a1_2'], 'a1_3' => [ 'atr' => 'atr_a1_2', 'form' => 'form_a1'], 'b1' => [ 'atr' => 'atr_b1'], 'c1' => [ 'form' => 'form_c1'], 'c1' => [ 'atr' => null, 'form' => 'form_c1'], ]; var_dump(array_column(array_filter($struct, static function (array $s): bool { return $s['atr'] && $s['form']; }), 'atr', 'form'));
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "form" in /in/MAnK7 on line 14 array(2) { ["form_a1"]=> string(8) "atr_a1_2" ["form_a1_2"]=> string(6) "atr_a1" }

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