PHP custom method to traverse all files in a directory_PHP tutorial

<span>header('content-type:text/html;charset=utf-8');<br />/**<br /> *   方法一：使用readir()遍历目录<br /> */<br />function listDir($dir)<br />{<br />    if(is_dir($dir))<br />    {<br />        if($handle = opendir($dir))<br />        {<br />            while($file = readdir($handle))<br />            {<br />                if($file != '.' && $file != '..')<br />                {<br />                    if(is_dir($dir.DIRECTORY_SEPARATOR.$file))<br />                    {<br />                        echo '目录名：'.$dir.DIRECTORY_SEPARATOR.'<font color="red">'.$file.'</font><br />';<br />                        listDir($dir.DIRECTORY_SEPARATOR.$file);<br />                    }else{<br />                        echo '文件名：'.$dir.DIRECTORY_SEPARATOR.$file.'<br />';<br />                    }<br />                }<br />            }<br />        }<br />        closedir($handle);<br />    }else{<br />        echo '非有效目录!';<br />    }<br />}<br />listDir('./phpmyadmin');</span> 

<span>/**<br /> *　方法二：使用dir()遍历目录<br /> *　dir()函数，成功时返回Directory类实例<br /> */<br />function</span> tree(<span>$dir</span><span>)
{
    </span><span>$mydir</span> = <span>dir</span>(<span>$dir</span><span>);
    </span><span>while</span>(<span>$file</span> = <span>$mydir</span>-><span>read())
    {
        </span><span>if</span>(<span>$file</span> != '.' && <span>$file</span> != '..'<span>)
        {
            </span><span>if</span>(<span>is_dir</span>("<span>$dir</span>/<span>$file</span>"<span>))
            {
                </span><span>echo</span> '目录名：'.<span>$dir</span>.DIRECTORY_SEPARATOR.'<font color="red">'.<span>$file</span>.'</font><br />'<span>;
                tree(</span>"<span>$dir</span>/<span>$file</span>"<span>);
            }</span><span>else</span><span>{
                </span><span>echo</span> '文件名：'.<span>$dir</span>.DIRECTORY_SEPARATOR.<span>$file</span>.'<br />'<span>;
            }
        }
    }
    </span><span>$mydir</span>-><span>close();
}
tree(</span>'./phpmyadmin');