search
HomeBackend DevelopmentPHP ProblemHow to get all the contents of a directory in PHP

This article will introduce to you how to obtain all the contents in the directory in PHP. It has certain reference value. Friends in need can refer to it. I hope it will be helpful to everyone.

How to get all the contents of a directory in PHP

This time we will introduce a directory iterator in the SPL library. Its function is actually very simple. As you can see from the name, it is to get all the items in the specified directory. content. Previously, we had to traverse the directory to obtain the directory and all the files in the directory, which usually required recursive traversal. To be honest, it is quite troublesome to write this code by ourselves, so PHP has prepared this set of built-in APIs for us. When entering the specified directory Then, directly return the contents of all subdirectories and files in the directory. Of course, it is not a tree shape, and the order is not certain. If we want to organize it into a tree shape, we need to process it ourselves.

Without further ado, let’s look at the code directly:

$path = $argv[1];

// 获取目录下所有内容
$dirs = new RecursiveIteratorIterator(new RecursiveDirectoryIterator($path), RecursiveIteratorIterator::SELF_FIRST);

foreach($dirs as $k=>$d){
    echo 'key:'. $k, PHP_EOL;
    if($d->isDir()){
        echo $d->getPathname(), PHP_EOL;
    }else{
        echo $d->getFilename(), PHP_EOL;
    }
}

//执行 php PHP获取目录中的全部内容RecursiveDirectoryIterator.php ../

// key:../.
// ../.
// key:../..
// ../..
// key:../source
// ../source
// key:../source/.
// ../source/.
// key:../source/..
// ../source/..
// key:../source/PHP获取目录中的全部内容RecursiveDirectoryIterator.php
// PHP获取目录中的全部内容RecursiveDirectoryIterator.php
// key:../source/PHP大文件读取操作.php
// PHP大文件读取操作.php
// key:../PHP大文件读取操作.md
// PHP大文件读取操作.md
// key:../PHP获取目录中的全部内容RecursiveDirectoryIterator.md
// PHP获取目录中的全部内容RecursiveDirectoryIterator.md

It’s actually just one line of code, and then directly loops to output the iterator. From the results, we can see that first enter the source directory and then traverse the external file contents, and obtain all the contents in the directory in the order of directory and file name. Isn’t it much more convenient than writing the recursive function ourselves?

What if we want to get all the PHP files in the directory and calculate their total file size? Using this set of iterator operations can also be completed very simply. We only need to add a regular iterator to filter the previous iterator content:

// 获取所有php文件
$regIts = new RegexIterator($dirs, '/^.+\.php$/i');
$fileSize = 0;
foreach($regIts as $k=>$p){
    echo $p->getSize() . ' ' .  $k, PHP_EOL;
    $fileSize += $p->getSize();
}
echo 'Total ', $fileSize, PHP_EOL;

// 622 ../source/PHP获取目录中的全部内容RecursiveDirectoryIterator.php
// 869 ../source/PHP大文件读取操作.php
// Total 1491

It feels the same as ls -l, It can conveniently allow us to perform related operations under the directory. The use of this class is briefly introduced here. There are many capabilities in the SPL library that are worthy of our exploration. Learn slowly and practice slowly to continuously improve our ability for elegant programming.

Test code:

https://github.com/zhangyue0503/dev-blog/blob/master/php/202003/source/PHP%E8%8E%B7%E5%8F%96%E7%9B%AE%E5%BD%95%E4%B8%AD%E7%9A%84%E5%85%A8%E9%83%A8%E5%86%85%E5%AE%B9RecursiveDirectoryIterator.php

Recommended learning: php video tutorial

The above is the detailed content of How to get all the contents of a directory in PHP. For more information, please follow other related articles on the PHP Chinese website!

Statement
This article is reproduced at:segmentfault. If there is any infringement, please contact admin@php.cn delete
php怎么把负数转为正整数php怎么把负数转为正整数Apr 19, 2022 pm 08:59 PM

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

php怎么实现几秒后执行一个函数php怎么实现几秒后执行一个函数Apr 24, 2022 pm 01:12 PM

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php字符串有没有下标php字符串有没有下标Apr 24, 2022 am 11:49 AM

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

php怎么除以100保留两位小数php怎么除以100保留两位小数Apr 22, 2022 pm 06:23 PM

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

php怎么根据年月日判断是一年的第几天php怎么根据年月日判断是一年的第几天Apr 22, 2022 pm 05:02 PM

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php怎么读取字符串后几个字符php怎么读取字符串后几个字符Apr 22, 2022 pm 08:31 PM

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

php怎么替换nbsp空格符php怎么替换nbsp空格符Apr 24, 2022 pm 02:55 PM

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\&nbsp\;||\xc2\xa0)/","其他字符",$str)”语句。

php怎么查找字符串是第几位php怎么查找字符串是第几位Apr 22, 2022 pm 06:48 PM

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。

See all articles

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks agoBy尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

MantisBT

MantisBT

Mantis is an easy-to-deploy web-based defect tracking tool designed to aid in product defect tracking. It requires PHP, MySQL and a web server. Check out our demo and hosting services.

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

Safe Exam Browser

Safe Exam Browser

Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool