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<?php $a = array(1=>1, 3=>3, 5=>5, 7=>7); $a = new ArrayObject($a); foreach ($a as $k => $v) { var_dump("$k => $v"); if ($k == 3) { $a['a'] = "?"; } } ?>
Output for git.master, git.master_jit, rfc.property-hooks
string(6) "1 => 1" string(6) "3 => 3" string(6) "5 => 5" string(6) "7 => 7" string(6) "a => ?"

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