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<?php $array = [ ['foo' => 'a', 'bar' => 1], ['foo' => 'b', 'bar' => 2], ]; foreach ($array as $x => ['new' => &$x]); var_export($array);
Output for git.master, git.master_jit, rfc.property-hooks
array ( 0 => array ( 'foo' => 'a', 'bar' => 1, 'new' => 0, ), 1 => array ( 'foo' => 'b', 'bar' => 2, 'new' => 1, ), )

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