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

$param2

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