Question

我想再次使用所有$gamename个变量：

foreach($gamelist as $e){
            $chunks = explode('/',$e->nodeValue);
            $gamename = substr($chunks[2],0,-5);
            echo $gamename;
            echo "<br/>";
        }
 getObjects($fullPath,$folder,$gamename)

正如我所看到的，$gamename在foreach循环之外是未定义的。

Answer 1

out循环$gamename具有最后一次迭代的值，

或undefined如果循环永不运行（$gamelist为空）

Answer 2

根据您的编辑，您需要以下内容：

$gamenames = array();

foreach($gamelist as $e){
            $chunks = explode('/',$e->nodeValue);
            $gamename = substr($chunks[2],0,-5);
            echo $gamename;
            $gamenames[] = $gamename;
            echo "<br/>";
        }

// $gamenames is an array containing all game names
getObjects($fullPath,$folder,$gamenames[0])    // for the first game name

Answer 3

for循环具有局部作用域，这意味着在循环执行之外声明它们内部的变量不存在，如果你想重用你应该在循环之外创建它们的$ gamename变量，请参考@jeroen的帖子示例

循环外的变量

3 个答案: