为什么函数使用use会报错？

Question

phpstorm报错：

代码：

$container = [];
function app($class_name) use ($container)
{
    return $container -> get($class_name);
}

报错：

Parse error: syntax error, unexpected 'use' (T_USE), expecting '{' in C:\Users\shellus\www\php-redis-note\public\index.php on line 16

Answer 1

知道了，要这样才行：

$container = [];
function app($class_name)
{
    global $container;
    return $container -> get($class_name);
}

use关键词只有闭包才能用 :)

Answer 2

$container = [];
$app = function($class_name) use ($container)
{
    return $container -> get($class_name);
}
echo $app();

Answer 3

use得这样用：

$container = [];
$app = function($class_name) use ($container)
{
    return $container -> get($class_name);
};

只能用在闭包

Answer 4

建议看看这个帖子：
http://www.cnblogs.com/melonb...

Answer 5

匿名函数关键字