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<?php $x=array('a'=>1,'b'=>2); $y=array('c'=>3,'a'=>4); var_dump($x+$y); var_dump(array_merge($a,$b));
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { ["a"]=> int(1) ["b"]=> int(2) ["c"]=> int(3) } Warning: Undefined variable $a in /in/kdACp on line 6 Warning: Undefined variable $b in /in/kdACp on line 6 Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /in/kdACp:6 Stack trace: #0 /in/kdACp(6): array_merge(NULL, NULL) #1 {main} thrown in /in/kdACp on line 6
Process exited with code 255.

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