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run code in 300+ PHP versions simultaneously
<?php $new_array=array(); $arr1=array("1","5","4"); $new_array=array_merge($new_array,$arr1); $arr2=array("2","6","3"); $new_array=array_merge($new_array,$arr2); echo "<pre>";print_r($new_array);exit;

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32.21 ms | 402 KiB | 5 Q