<?php $arrarr = array( array('a' => 0), array('a' => 1, 'b' => 2), array('a' => 2, 'b' => 3, 'c' => 4), array('a' => 3, 'b' => 4, 'c' => 5, 'd' => 6) ); foreach ($arrarr as $row) { foreach ($row as $key => &$value) { if ($key === 'b' || $key === 'd') { $value = 'foo'; } } print(implode(",", $row)); } var_dump($arrarr);
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