错误404 php但文件在public_html文件夹中[关闭]

I upload my simple website using 000webhost free service. I've checked and linked index.php to every page in my website.

<ul>
    <li class="selected">
        <a href="public_html/index.php">home</a>
    </li>
    <li>
        <a href="public_html/about.php">about</a>
    </li>
    <li>
        <a href="public_html/gallery.php">gallery</a>
    </li>
    <li>
        <a href="public_html/history.php">history</a>
    </li>
    <li>
        <a href="public_html/contact.php">contact</a>
    </li>
</ul>    

but when I access it in my website, it shows error 404.

thanks before.

Don't reference public_html in your links; that's designed for the back end.

For instance, this:

        <li class="selected">
            <a href="public_html/index.php">home</a>
        </li>

Should just be

        <li class="selected">
            <a href="index.php">home</a>
        </li>

Your main page should be stored as index.html (or index.php) in your public_html directory.