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run code in 300+ PHP versions simultaneously
<?php $a1 = array('foo' => 'foo', 'bar' => 'bar'); $a2 = array('zuu' => 'zuu', 'bar' => 'bar2'); var_dump($a1+$a2, array_merge($a1,$a2), array_merge($a1+$a2));

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53.01 ms | 402 KiB | 5 Q