学步园

    $arr = array('食品','水果','玩具','饮料','电器');
   
    while(list($key,$value) = each($arr)){
        if ($value == '水果'){
            $value = "$value:OK";
        }
        echo "[$key]$value<br />";
    }
   
    foreach($arr as $key => $value){
        echo "[$key]$value<br />";
    }