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Home Backend Development PHP Tutorial php 目录迭代器 RecursiveDirectoryIterator 如何提高效率

php 目录迭代器 RecursiveDirectoryIterator 如何提高效率

Jun 23, 2016 pm 01:55 PM
php improve efficiency Table of contents

迭代器方式
echo '程序开始时间:'.time().'
';
$path = 'd:/www';
getRevDir($path);
echo '程序结束时间:'.time().'
';
exit;
echo '

';  <br> //获取当前路径下所有的目录和文件名  <br> //这种用法主要是用在获取远程服务器目录的B/S程序中  <br> var_dump(array_keys(iterator_to_array(new RecursiveDirectoryIterator($path))));  <br> exit;  <br>  <br> //迭代获取当前路径下所有的目录和文件  <br> function getRevDir($path, $level = 0){  <br> $dirIterator = new RecursiveDirectoryIterator($path);  <br> $strSplitBar = '';  <br> for($i=0;$i if($i == $level-1){  <br> $strSplitBar .= '|__';  <br> }else{  <br> $strSplitBar .= '  ';  <br> }  <br> }  <br> foreach ($dirIterator as $key => $fileInfo){  <br> if($dirIterator->hasChildren()){  <br> $dirName = substr($key,strrpos($key, DIRECTORY_SEPARATOR)+1);  <br> echo $strSplitBar.$dirName.'<br>';  <br> getRevDir($key, $level+1);  <br> }else{  <br> echo $strSplitBar.basename($key).'<br>';  <br> }  <br> }  <br> }  <br> 执行结果  <br> 程序开始时间:1402624676  <br> 程序结束时间:1402624682  <br>  <br> opendir 方式  <br> <?php <br /> echo '程序开始时间:'.time().'<br>';  <br> $path = 'd:/www';  <br> getRevDir($path);  <br> echo '程序结束时间:'.time().'<br>';  <br> exit;  <br> echo '<pre class="brush:php;toolbar:false">';  <br> //获取当前路径下所有的目录和文件名  <br> //这种用法主要是用在获取远程服务器目录的B/S程序中  <br> var_dump(array_keys(iterator_to_array(new RecursiveDirectoryIterator($path))));  <br> exit;  <br>  <br> //迭代获取当前路径下所有的目录和文件  <br> function getRevDir($path, $level = 0){  <br> $dirIterator = new RecursiveDirectoryIterator($path);  <br> $strSplitBar = '';  <br> for($i=0;$i if($i == $level-1){  <br> $strSplitBar .= '|__';  <br> }else{  <br> $strSplitBar .= '  ';  <br> }  <br> }  <br> foreach ($dirIterator as $key => $fileInfo){  <br> if($dirIterator->hasChildren()){  <br> $dirName = substr($key,strrpos($key, DIRECTORY_SEPARATOR)+1);  <br> echo $strSplitBar.$dirName.'<br>';  <br> getRevDir($key, $level+1);  <br> }else{  <br> echo $strSplitBar.basename($key).'<br>';  <br> }  <br> }  <br> }  <br>  <br> 执行结果  <br> 程序开始时间:1402624679  <br> 程序结束时间:1402624682  <br> 时间相差好大.  <p>  </p>  <br> <h2 id="回复讨论-解决方案">回复讨论(解决方案)</h2> <p class="sougouAnswer">  遍历整个网站目录才 3 秒钟,够快的了 </p> <p class="sougouAnswer">  遍历的效率也就这样了吧。  <br> 要不用Linux命令获取目录树再处理看看。 </p>
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