任務(wù)：

創(chuàng)建file1.php, file2.php, file3.php 分別定義不同的命名空間 分別定義?法：foo()，定義類(lèi)Demo，定義常量NUMBER 創(chuàng)建main.php，并在其中引?file123，并分別調(diào)?其中的?法，創(chuàng)建類(lèi)并輸出常量。

file1.php

 <?php
namespace task1\File1;
function foo()
{
    echo "file1.php\n";
}
?>

file2.php

<?php
namespace task1\File2;
class Demo{
    private $name;
    public function __construct(){
        $this->name = "class defined in task1\\file2\\Demo";
    }
    public function speak(string $na){
        echo $na. " is an object from ".$this->name . "\n";
    }
}
?>

file3.php

<?php
namespace task1\File3;
const NUMBER = 266;
?>

main.php

<?php
require("./file1.php");
require("./file2.php");
require("./file3.php");
use function task1\File1\foo as foo1;
foo1();
echo "</br>\n";
$demo1=new task1\File2\Demo();
$demo1->speak("demo1");
echo "</br>\n";
use const task1\File3\NUMBER as number1;
echo number1."\n";
echo "</br>\n";
?>

運(yùn)行結(jié)果

task1運(yùn)行結(jié)果.jpg