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<?php $foo = 'foo'; $bar = new stdClass; $bar->$foo = array(); var_dump($bar); $bar->$foo[0] = 42; var_dump($bar);
Output for git.master, git.master_jit, rfc.property-hooks
object(stdClass)#1 (1) { ["foo"]=> array(0) { } } object(stdClass)#1 (1) { ["foo"]=> array(1) { [0]=> int(42) } }

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