Display an array
<?php function array_display($array, $pre=FALSE) { $tag = $pre ? 'pre' : 'p'; printf("<%s>%s</%s>\n", $tag, var_export($array, TRUE), $tag); } function change(&$element, $key, $mark) { $element = "$mark$key$mark, the $element"; } $dogs = array('A' => 'AA', 'Bud' => 'BB'); array_display($dogs, TRUE); array_walk($dogs, 'change', '*'); array_display($dogs, TRUE); ?>