Usage of use clause in PHP anonymous function

This article mainly introduces the usage of the use clause in PHP anonymous functions. Interested friends can refer to it. I hope it will be helpful to everyone.

The sample code is as follows:

function test()
{
  $param2 = 'every';
  // 返回一个匿名函数
  return function ($param1) use ($param2) {
    // use子句 让匿名函数使用其作用域的变量
    $param2 .= 'one';
    print $param1 . ' ' . $param2;
  };
}
$anonymous_func = test();
$anonymous_func('hello');

Output result: hello world

$param1 and $param2 are closure variables

function test()
{
  $param2 = 'everyone';
  $func = function ($param1) use ($param2) {
    // use子句 让匿名函数使用其父作用域的变量
    print $param1 . ' ' . $param2;
  };
  $param2 = 'everybody';
  return $func;
}
$anonymous_func = test();
$anonymous_func('hello');

Output result：hello everyone

function test()
{
  $param2 = 'everyone';
  $func = function ($param1) use (&$param2) {
    // use子句 让匿名函数使用其父作用域的变量
    print $param1 . ' ' . $param2;
  };
  $param2 = 'everybody';
  return $func;
}
$anonymous_func = test();
$anonymous_func('hello');

Output result：hello everybody

There is an additional quote in

$param2

Summary: The above is the entire content of this article, I hope it will be helpful to everyone's study.

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