<?php
    /**
     * 把命名空间比喻成文件目录
    */
    namespace kuangweijian;

    $varA=1;

    function funcA(){
        echo "hello world".PHP_EOL;
    }

    class ClassA
    {
        public $varA;
        public function funcA(){
            echo "hello".PHP_EOL;
        }
    }
    
    $obj=new ClassA;
    $obj->funcA();
?>