function test_alter(&$item1, $key, $prefix)
{
$item1 = “$prefix: $item1”;
}

function test_print($item2, $key)
{
echo “$key. $item2
\n”;
}

echo “Before …:\n”;
array_walk($fruits, ‘test_print’);

array_walk($fruits, ‘test_alter’, ‘fruit’);
echo “… and after:\n”;

array_walk($fruits, ‘test_print’);
?>

才翻出array_walk

数组不全，帮你补上了，不知道对不对。

效果
Before …:
d. lemon
a. orange
b. banana
c. apple
… and after:
d. fruit: lemon
a. fruit: orange
b. fruit: banana
c. fruit: apple

array_walk ($clothes,’display’) ;
function display($value, $key){
if(is_array($value)){
array_walk($value,’display’);
}else{
echo $value.”;
}
}
?>
拙见！