Several ways to traverse directories and folders in PHP

Home

Backend Development

PHP Tutorial

Several ways to traverse directories and folders in PHP_PHP Tutorial

WBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWBOYWB

Jul 13, 2016 am 10:48 AM

phpunderandintroduceseveralseveral kindsCanclassmatefoldermethodofTable of contentsTraverse

The editor below will introduce to you some methods of traversing directories. Here you can traverse directories, directories and other files in them. If you are interested in this, feel free to enter for reference.

Traverse directories or traverse files of specified types in directories. This is something that every kid will inevitably use when writing programs. PHP itself also provides many very useful functions. If you use them correctly, you will not go wrong.
Below are some summaries of my personal learning process. I hope it will be helpful to children who want to learn PHP.

//This function can list all files in the specified directory (including subdirectories)

The code is as follows

Copy code

代码如下

复制代码

function getfiles($path){
foreach(scandir($path) as $afile)
{

if($afile=='.'||$afile=='..') continue;
if(is_dir($path.'/'.$afile))
{
getfiles($path.'/'.$afile);
} else {
echo $path.'/'.$afile.'
';
}
}
} //简单的demo,列出当前目录下所有的文件

getfiles(__DIR__);

function getfiles($path){

foreach(scandir($path) as $afile)

{

if($afile=='.'||$afile=='..') continue;

if(is_dir($path.'/'.$afile))

代码如下	复制代码
function getfiles($path){ foreach(glob($path) as $afile){ if(is_dir($afile)) { getfiles($afile.'/*'); } else { echo $afile.' '; } } } //简单的demo,列出当前目录下所有的文件 getfiles(__DIR__);0

{ getfiles($path.'/'.$afile); } else { echo $path.'/'.$afile.'
'; } } } //Simple demo, list all files in the current directory getfiles(__DIR__);

scandir() returns an array of all files and directories in the specified directory. In PHP, it also provides a very powerful function glob(). glob() has 2 parameters. As for the second parameter is optional, more on that later. Let’s look directly at how to traverse directories using glob(). // //It can be seen that '.' and '..' have been filtered out from the content returned by glob(), where * means traversing all files in the directory. Correspondingly, if it is changed to *.txt, all txt files in the directory will be traversed. Isn’t it very convenient? Its convenience is not limited to this. According to Yuan Fang, there is also a huge secret hidden in it. What is it? We will talk about it later. If you are interested, you can leave me a message to communicate.

The code is as follows	Copy code
function getfiles($path){ foreach(glob($path) as $afile){ if(is_dir($afile)) { getfiles($afile.'/*'); } else { echo $afile.' '; } } } //Simple demo, list all files in the current directory getfiles(__DIR__);0

Since using *.txt will traverse all txt files in the directory, what if I want it to traverse files in certain formats at the same time? what to do? Some kid must have thought of using an array, and then quickly wrote it out and replaced it with {*.txt,*.jpg,*.zip,...}. Of course, they also quickly discovered that the program returned false and got nothing. . Don't be disappointed, this involves the second optional parameter just mentioned. This parameter is used to change the behavior of glob. For details, you can check the PHP manual. I won't go into too much here. I will just talk about GLOB_BRACE. This is Used to expand {a,b,c,...} to match 'a', 'b' or 'c',.... The usage is as follows: foreach(glob($path.'/{*.txt,*.jpg,*.zip,...}', GLOB_BRACE) as $fileName){...}

As for the complete function of traversing all specified file types in a directory, we can see the following example

Traverse all files in folders and subfolders

The code is as follows

Copy code

代码如下

复制代码

代码如下	复制代码
$dir="E:/video"; //这里输入其它路径 //PHP遍历文件夹下所有文件 $handle=opendir($dir."."); echo "文件: "; while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { echo $file; //输出文件名 } } closedir($handle); ?>

Some commonly used examples

The code is as follows	Copy code
$dir="E:/video"; //Enter other paths here //PHP traverses all files in the folder $handle=opendir($dir."."); echo "File: "; while (false !== ($file = readdir($handle))) { if ($file != "." && $file != "..") { echo $file; //Output file name } } closedir($handle); ?>

I used this code to traverse all files and save all file names as an array for me.

The code is as follows

代码如下

复制代码

$s=explode("/n",trim(`dir/b e://video`));
print_r($s);
?>

$dir="E:/video"; //这里输入其它路径
//PHP遍历文件夹下所有文件
$handle=opendir($dir.".");
echo "文件:
";
while (false !== ($file = readdir($handle)))
{
if ($file != "." && $file != "..") {
$file=$file.','; //输出文件名
$file=explode(',',$file);
}
}
print_r($file);//输出的就是数组了
closedir($handle);
?>

$dir="."; //这里输入其它路径
//PHP遍历文件夹下所有文件
$handle=opendir($dir.".");
echo "文件:
";
//定义用于存储文件名的数组
$array_file = array();
while (false !== ($file = readdir($handle)))
{
if ($file != "." && $file != "..") {
$array_file[] = $file; //输出文件名
}
}
closedir($handle);

print_r("

");<br>
print_r($array_file);<br>
print_r("

");
?>

Copy code

$s=explode("/n",trim(`dir/b e://video`));
print_r($s);
?>

$dir="E:/video"; //Enter other paths here
//PHP traverses all files in the folder
$handle=opendir($dir.".");
echo "File:
";
while (false !== ($file = readdir($handle)))
{
if ($file != "." && $file != "..") {
$file=$file.','; //Output file name
$file=explode(',',$file);
}
}
print_r($file);//The output is an array
closedir($handle);
?>

http://www.bkjia.com/PHPjc/632763.html

www.bkjia.com

truehttp: //www.bkjia.com/PHPjc/632763.htmlTechArticleThe following editor will introduce to you several methods of traversing directories. Here you can traverse directories and directories and other The document is available for reference if you are interested. Traverse directories...

Statement

The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn