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<?php $a1 = array('asdf'=>1,'asdfasdf'=>2,'wer'=>3,'123'=>4); $a1 += array(5=>5,6=>6,7=>7); var_dump($a1);
Output for git.master, git.master_jit, rfc.property-hooks
array(7) { ["asdf"]=> int(1) ["asdfasdf"]=> int(2) ["wer"]=> int(3) [123]=> int(4) [5]=> int(5) [6]=> int(6) [7]=> int(7) }

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