<?php function test(Closure $call) { $a = 63; $b = 22; echo "hello"; echo $call($a,$b); } $func = function($a,$b){ return $a + $b; }; test($func); //调用顺序 先调用test ，输出hello 然后$call是个闭包，执行这个函数，传递两个值过去，想加后返回
[root@localhost swoole]# php time.php
hello85[root@localhost swoole]#
原文：https://www.cnblogs.com/brady-wang/p/13352957.html