<?php $x1 = $x2 = $e = array(); $x3 = $x4 = $y = array('foo' => 'bar'); $x1 += $y; $x3 += $e; $x2 = array_merge($x2, $y); $x4 = array_merge($x4, $e); var_dump($x1); var_dump($x2); var_dump($x3); var_dump($x4);
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