php 读取目录所有文件信息dir（）

<?phpset_time_limit(0);function tree($directory){$mydir=dir($directory);echo "<ul> ";while($file=$mydir->read()){if((is_dir("$directory/$file")) AND ($file!=".") AND ($file!="..")){        echo "<li><font color='#ff00cc'><b>$file</b></font></li> ";tree("$directory/$file");}else        {echo "<li>$file</li> ";        }}echo "</ul>";$mydir->close();}//start the programecho "<h2>目录为粉红色</h2>";tree(".");?>