This time I will bring you an analysis of the actual use of PHP closures. What are theprecautions for the actual use of PHP closures?. The following is a practical case, let's take a look.
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One more example
$message = 'hello'; $example = function() use ($message){ var_dump($message); }; echo $example(); //输出hello $message = 'world'; //输出hello 因为继承变量的值的时候是函数定义的时候而不是 函数被调用的时候 echo $example(); //重置为hello $message = 'hello'; //此处传引用 $example = function() use(&$message){ var_dump($message); }; echo $example(); //输出hello $message = 'world'; echo $example(); //此处输出world //闭包函数也用于正常的传值 $message = 'hello'; $example = function ($data) use ($message){ return "{$data},{$message}"; }; echo $example('world'); //此处输出world,hello
I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website!
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