php遍历目录与文件夹的多种方法
介绍几个php遍历目录的方法，可以遍历目录及目录中的文件，供大家参考
遍历目录或遍历目录下指定类型的文件，这是每一个童鞋在写程序的时候难免会用到的。PHP本身也提供了很多灰常有用的函数，正确地使用它们，不会有错滴。
下面就我个人学习过程中的一些总结，希望对想学PHP的童鞋有所帮助。
本函数可以列出指定目录下所有的文件（包括子目录下的）
代码如下:
function getfiles($path){
foreach(scandir($path) as $afile)
{
if($afile=='.'||$afile=='..') continue;
if(is_dir($path.'/'.$afile))
{
getfiles($path.'/'.$afile);
} else {
echo $path.'/'.$afile.'<br />';
}
}
} //简单的demo,列出当前目录下所有的文件
getfiles(__DIR__);scandir() 是返回指定目录下所有的文件和目录组成的数组，在PHP中，还提供了一个灰常强大的函数glob()，glob()有2个参数，至于第2个参数是可选的，稍后再讲。 直接来看，用glob()怎么遍历目录的。
可以看出，glob()返回的内容中已经过滤掉了'.'和'..'，其中*表示遍历目录下所有文件。相应的，如果改为*.txt，则会遍历目录下所的txt文件。是不是很方便呢？它的方便之处可不止这一点，据元芳说，这里面还藏着一个天大的秘密，是什么呢？以后再说，有兴趣的话，可以给我留言交流。
代码如下:
function getfiles($path){
foreach(glob($path) as $afile){
if(is_dir($afile))
{ getfiles($afile.'/*'); } else { echo $afile.'<br />'; }
}
} //简单的demo,列出当前目录下所有的文件
getfiles(__DIR__);0既然说用 *.txt，就会遍历目录下所的txt文件，那如果我想让它同时遍历某几种格式的文件呢？怎么办？肯定有童鞋想到用数组了，然后很快的写出来替换进去{*.txt,*.jpg,*.zip,...}，当然也很快地发现，程序返回false，什么都得不到。不要失望，这涉及到了刚才所说的第2个可选参数，这个参数是用来改变glob的行为的，具体都有些什么，可以查阅PHP手册，这里不多讲，只说一个GLOB_BRACE，这是用来扩充 {a,b,c，...} 来匹配 'a'，'b' 或 'c'，...的。用法如下：foreach(glob($path.'/{*.txt,*.jpg,*.zip,...}', GLOB_BRACE) as $fileName){...}
至于完整的遍历目录下所有的指定文件类型函数，我们可以看下面实例
遍历文件夹及子文件夹所有文件
代码如下:
<html>
<body>
<?php
function traverse($path = '.') {
$current_dir = opendir($path); //opendir()返回一个目录句柄,失败返回false
while(($file = readdir($current_dir)) !== false) { //readdir()返回打开目录句柄中的一个条目
$sub_dir = $path . DIRECTORY_SEPARATOR . $file; //构建子目录路径
if($file == '.' || $file == '..') {
continue;
} else if(is_dir($sub_dir)) { //如果是目录,进行递归
echo 'Directory ' . $file . ':<br>';
traverse($sub_dir);
} else { //如果是文件,直接输出
echo 'File in Directory ' . $path . ': ' . $file . '<br>';
}
}
}
traverse('xxtt');
?>
</body>
</html>
一些常用的实例
代码如下:
<?php
$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:<br>";
while (false !== ($file = readdir($handle)))
{
if ($file != "." && $file != "..") {
echo $file; //输出文件名
}
}
closedir($handle);
?>
用了这段代码遍历所有文件，帮我把所有文件名存为一个数组。
代码如下:
<?php
$s=explode("/n",trim(`dir/b e://video`));
print_r($s);
?>
<?php
$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:<br>";
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);
?>
<?php
$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:<br>";
//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("<pre class="brush:php;toolbar:false">");
print_r($array_file);
print_r("");
?>
Hot AI Tools
Undresser.AI Undress
AI-powered app for creating realistic nude photos
AI Clothes Remover
Online AI tool for removing clothes from photos.
Undress AI Tool
Undress images for free
Clothoff.io
AI clothes remover
AI Hentai Generator
Generate AI Hentai for free.
Hot Article
Hot Tools
Notepad++7.3.1
Easy-to-use and free code editor
SublimeText3 Chinese version
Chinese version, very easy to use
Zend Studio 13.0.1
Powerful PHP integrated development environment
Dreamweaver CS6
Visual web development tools
SublimeText3 Mac version
God-level code editing software (SublimeText3)
Hot Topics
1386
52
PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian
Dec 24, 2024 pm 04:42 PM
PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati
How To Set Up Visual Studio Code (VS Code) for PHP Development
Dec 20, 2024 am 11:31 AM
Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c
7 PHP Functions I Regret I Didn't Know Before
Nov 13, 2024 am 09:42 AM
If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op
How do you parse and process HTML/XML in PHP?
Feb 07, 2025 am 11:57 AM
This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an
Explain JSON Web Tokens (JWT) and their use case in PHP APIs.
Apr 05, 2025 am 12:04 AM
JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,
PHP Program to Count Vowels in a String
Feb 07, 2025 pm 12:12 PM
A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total
Explain late static binding in PHP (static::).
Apr 03, 2025 am 12:04 AM
Static binding (static::) implements late static binding (LSB) in PHP, allowing calling classes to be referenced in static contexts rather than defining classes. 1) The parsing process is performed at runtime, 2) Look up the call class in the inheritance relationship, 3) It may bring performance overhead.
What are PHP magic methods (__construct, __destruct, __call, __get, __set, etc.) and provide use cases?
Apr 03, 2025 am 12:03 AM
What are the magic methods of PHP? PHP's magic methods include: 1.\_\_construct, used to initialize objects; 2.\_\_destruct, used to clean up resources; 3.\_\_call, handle non-existent method calls; 4.\_\_get, implement dynamic attribute access; 5.\_\_set, implement dynamic attribute settings. These methods are automatically called in certain situations, improving code flexibility and efficiency.
