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<?php $a = array(array("a"=>"aaaa")); var_dump($a["a"]); foreach ($a as &$row) { test($row["a"]); } function test($a) { echo $a; }
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined array key "a" in /in/cYfMR on line 3 NULL aaaa

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