Something wrong with ZIP

I don't know why it not work?

PHP:

        $zipPath = $this->getDataFolder($this->getServer()->getDataPath() . "worlds/map.zip");
            $zip = new \ZipArchive;
            $result = $zip->open($zipPath);
        $zip->extractTo($this->getServer()->getDataPath() . "worlds/");
            $zip->close();


This is the error I got:
[WARNING] RuntimeException: "ZipArchive::extractTo(): Invalid or uninitialized Zip object" (E_WARNING) in "/exampleplugin/src/Main" at line 57

Try $zip = new ZipArchive();

Now it have another error :
[CRITICAL] ClassNotFoundException: "Class exampleplugin\ZipArchive not found" (EXCEPTION) in "/src/spl/BaseClassLoader" at line 144

PHP:

$zip = new \ZipArchive();


If you want use classes already added in php library use \ before class name

That's the same. Nothing changed.

Maybe because the ZIP file doesn't exist or is corrupted?
Try doing

PHP:

var_dump(is_file($this->getServer()->getDataPath() . "worlds/map.zip"));

Not the same. In one case it was missing parenthesis. In other missing back slash.

Punctuation is important in computer languages.

I meant new \ZipArchive and new \ZipArchive() are the same in PHP.

[WARNING] RuntimeException: "ZipArchive:Open(): Empty string as source" (E_WARNING) in "/exampleplugin/src/Main" at line 56
this is the error I got after I try this

PHP:

        $zipPath=var_dump(is_file($this->getServer()->getDataPath() . "worlds/map.zip"));
        $zip = new \ZipArchive;
            $result = $zip->open($zipPath);
        $zip->extractTo($this->getServer()->getDataPath() . "worlds/");
            $zip->close();


Same Error
[WARNING] RuntimeException: "ZipArchive::extractTo(): Invalid or uninitialized Zip object" (E_WARNING) in "/exampleplugin/src/Main" at line 57

Why did you use var_dump()? var_dump() returns void. I told you to use var_dump(is_file()) to check whether the file exists, not to use it as $zipPath!

Example please

Sorry, used to Java .

=_=