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回复讨论(解决方案)

目录遍历优化

Jun 20, 2016 pm 12:44 PM

我写了一段代码,实现了遍历目录以及该目录下的所有文件,功能是实现了,但是总觉得代码有优化的余地,希望各位大神帮忙瞧瞧。 //指定页面编码方式
header('Content-type:text/html;charset=utf-8');

$dir='f:/dir';

//方法调用
search_all_dir($dir);

//遍历目录的方法
function search_all_dir($dir)
{
if(is_dir($dir))
{
$handle=opendir($dir);

$piarr=array('.','..');

while($file=readdir($handle))
{
if(in_array($file,$piarr)==FALSE)
{
if(is_dir($dir.'/'.$file))
{
echo '目录名称:  '.$file.'
';
$files=search_all_file($dir.'/'.$file);
if(isset($files[0]))
{
echo '该目录下的所有文件:'.'
';
foreach($files as $filel)
{
echo ' '.$filel;
}

}
search_all_dir($dir.'/'.$file);
}
}

}
}
else
{
echo $dir.'不是合法目录或不是目录,强制退出';
}

}

//遍历特定目录下的所有文件
function search_all_file($dir)
{
$files=array();
if(is_dir($dir))
{
$handle=opendir($dir);

$piarr=array('.','..');

while($file=readdir($handle))
{
if(in_array($file,$piarr)==FALSE)
{
if(is_dir($dir.'/'.$file)==FALSE)
{
 $files[]=' '.$file.'
';

}
}

}
}

return $files;

}


回复讨论(解决方案)

使用目录函数写,也就是这样了
用目录迭代器简单点

  $ite = new RecursiveDirectoryIterator($dir);  $nbfiles=0;  foreach (new RecursiveIteratorIterator($ite) as $filename=>$cur) {    if(is_dir($filename)) continue;    echo $filename . '<br>';  }
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不过目录迭代器是按文件的创建时间遍历的,有时结果比较怪异

我一般使用 glob 函数遍历
$r = glob('images/*');for($i=0; $i<count($r); $i++) {  if(is_dir($r[$i])) $r = array_merge($r, glob($r[$i] . '/*'));}print_r($r);
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glob 的结果是按文件名排序的,你可以控制他不排序

glob 另一个用法可以轻松的找到指定的文件
$p = '*/';$f = 'ide_tmp.php';$r = array();for($i=0; $i<3; $i++) {  $t = glob($p.$f);  if($t) $r = array_merge($r, $t);  $p .= '*/';}print_r($r);
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这样就可以找到3层目录已内的全部 ide_tmp.php 文件

谢谢你的耐心回答,多谢 了,我的目的在于如何优化改进我的代码,函数不改变的情况下。谢谢

<?php	//指定页面编码方式	header('Content-type:text/html;charset=utf-8');	$dir='f:/dir';	//方法调用	search_all_dir($dir);	//遍历目录的方法	function search_all_dir($dir)	{		if(is_dir($dir))		{			$handle=opendir($dir);						$piarr=array('.','..');			while($file=readdir($handle))			{					if(in_array($file,$piarr)==FALSE)					{						if(is_dir($dir.'/'.$file))						{							echo '目录名称:  '.$file.'<br>';							$files=search_all_file($dir.'/'.$file);							if(isset($files[0]))							{								echo '该目录下的所有文件:'.'<br>';								foreach($files as $filel)								{									echo ' '.$filel;								}							}							search_all_dir($dir.'/'.$file);						}					}						}		}		else		{			echo $dir.'不是合法目录或不是目录,强制退出';		}	}		//遍历特定目录下的所有文件	function search_all_file($dir)	{		$files=array();		if(is_dir($dir))		{			$handle=opendir($dir);						$piarr=array('.','..');			while($file=readdir($handle))			{					if(in_array($file,$piarr)==FALSE)					{						if(is_dir($dir.'/'.$file)==FALSE)						{							 $files[]=' '.$file.'<br>';													}					}						}		}				return $files;	}
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