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<?php $test = array( 'abc' => 123, 'def' => 456, 'test' => array( 123 => 'hip', 'hop' => array( 'tip' => 'top', 'top' => null ) ) ); $ref = &$test; foreach ($test as $old => &$arr) { if (is_array($arr)) { unset($test[$old]); foreach ($arr as $new => $v) { $test[$old.$new] = $v; } } } var_dump($test);
Output for git.master, git.master_jit, rfc.property-hooks
array(5) { ["abc"]=> int(123) ["def"]=> int(456) ["test123"]=> string(3) "hip" ["testhoptip"]=> string(3) "top" ["testhoptop"]=> &NULL }

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