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run code in 300+ PHP versions simultaneously
<?php $a = array( 'a'=>1, 'b'=>2, 'c'=>3 ); $b = array( 'b'=>3, 'c'=>4, 'd'=>5 ); echo $a + $b; foreach(array_keys($a + $b) as $key){ echo $key; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Array to string conversion in /in/Y0oTe on line 12 Arrayabcd

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