PHP closure definition and usage simple example php tips

This article mainly introduces the definition and use of PHP closures. It analyzes the simple definition, usage and related precautions of PHP closures in the form of simple examples. Friends in need can refer to the examples in this article

Describes the definition and use of PHP closures. Share it with everyone for your reference, the details are as follows:

      


      
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$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
      


      

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