PHP常用技术文之文件操作和目录操作总结_PHP
一、基本文件的操作
文件的基本操作有:文件判断、目录判断、文件大小、读写性判断、存在性判断及文件时间等
<?php header("content-type","text/html;charset=utf-8"); /* *声明一个函数,传入文件名获取文件属性 *@param string $fileName 文件名称 */ function getFilePro($fileName) { if(!file_exists($fileName)) { echo '文件不存在<br/>'; return; } /*是否是普通文件*/ if(is_file($fileName)) { echo $fileName.'是一个文件<br/>'; } /*是否是目录*/ if(is_dir($fileName)) { echo $fileName.'是一个目录'; } /*输出文件的型态*/ echo '文件型态是:'.getFileType($fileName).'<br/>'; /*文件大小,转换单位*/ echo '文件大小是:'.getFileSize(filesize($fileName)).'<br/>'; /*文件是否可读*/ if(is_readable($fileName)) { echo '文件可读<br/>'; } /*文件是否可写*/ if(is_writable($fileName)) { echo '文件可写<br/>'; } /*文件是否可执行*/ if(is_executable($fileName)) { echo '文件可执行<br/>'; } echo '文件创立时间:'.date('Y年m月j日',filectime($fileName)).'<br/>'; echo '文件最后修改时间:'.date('Y年m月j日',filemtime($fileName)).'<br/>'; echo '文件最后打开时间:'.date('Y年m月j日',fileatime($fileName)).'<br/>'; } /* *声明一个函数,返回文件类型 *@param string $fileName 文件名称 */ function getFileType($fileName) { $type = ''; switch(filetype($fileName)) { case 'file':$type .= '普通文件';break; case 'dir':$type .= '目录文件';break; case 'block':$type .= '块设备文件';break; case 'char':$type .= '字符设备文件';break; case 'filo':$type .= '管道文件';break; case 'link':$type .= '符号链接';break; case 'unknown':$type .= '未知文件';break; default: } return $type; } /* *声明一个函数,返回文件大小 *@param int $bytes 文件字节数 */ function getFileSize($bytes) { if($bytes >= pow(2,40)) { $return = round($bytes / pow(1024,4),2); $suffix = 'TB'; } else if($bytes >= pow(2,30)) { $return = round($bytes / pow(1024,3),2); $suffix = 'GB'; } else if($bytes >= pow(2,20)) { $return = round($bytes / pow(1024,2),2); $suffix = 'MB'; } else if($bytes >= pow(2,10)) { $return = round($bytes / pow(1024,1),2); $suffix = 'KB'; } else { $return = $bytes; $suffix = 'B'; } return $return." ".$suffix; } /*调用函数,传入test目录下的test.txt文件*/ getFilePro('./test/div.html'); ?>
结果:
二、目录的操作
目录的操作有:遍历目录、删除、复制、大小统计等
1、遍历目录
/* *遍历目录 *@param string $dirName 目录名 */ function findDir($dirName) { $num = 0; /*统计子文件个数*/ $dir_handle = opendir($dirName); /*打开目录*/ /*输出目录文件*/ echo '<table border="0" align="center" width="600" cellspacing="0" cellpadding="0">'; echo '<caption><h2 id="目录-dirName-下的文件">目录'.$dirName.'下的文件</h2></caption>'; echo '<tr align="left" bgcolor="#cccccc"'; echo '<th>文件名</th><th>文件大小</th><th>文件类型</th><th>修改时间</th></tr>'; while($file = readdir($dir_handle)) { $dirFile = $dirName.'/'.$file; $bgcolor = $num++%2==0?'#ffffff':'#cccccc'; echo '<tr bgcolor='.$bgcolor.'>'; echo '<td>'.$file.'</td>'; echo '<td>'.filesize($dirFile).'</td>'; echo '<td>'.filetype($dirFile).'</td>'; echo '<td>'.date('Y/n/t',filemtime($dirFile)).'</td>'; echo '</tr>'; } echo "</table>"; closedir($dir_handle); /*关闭目录*/ echo "在<b>".$dirName."</b>目录下共有<b>".$num.'</b>个子文件'; } /*传递当前目录下的test目录*/ findDir('./test');
结果
2、统计目录大小
/* *统计目录大小 *@param string $dirName 目录名 *@return double */ function dirSize($dirName) { $dir_size = 0; if($dir_handle = @opendir($dirName)) { while ($fileName = readdir($dir_handle)) { /*排除两个特殊目录*/ if($fileName != '.' && $fileName != '..') { $subFile = $dirName.'/'.$fileName; if(is_file($subFile)) { $dir_size += filesize($subFile); } if(is_dir($subFile)) { $dir_size += dirSize($subFile); } } } closedir($dir_handle); return $dir_size; } } /*传递当前目录下的test目录*/ $dir_size = dirSize('./test'); echo './test目录文件大小是:'.round($dir_size / pow(1024,1),2).'KB';
结果:
3、删除目录
/* *删除目录 *@param string $dirName 目录名 */ function delDir($dirName) { /*php中的mkdir函数就可以创建目录*/ if(file_exists($dirName)) { if($dir_handle = @opendir($dirName)) { while ($fileName = readdir($dir_handle)) { /*排除两个特殊目录*/ if($fileName != '.' && $fileName != '..') { $subFile = $dirName.'/'.$fileName; if(is_file($subFile)) { unlink($subFile); } if(is_dir($subFile)) { delDir($subFile); } } } closedir($dir_handle); rmdir($dirName); return $dirName.'目录已经删除'; } } } /*传递test目录的副本test1*/ echo delDir('./test1');
删除成功的提示信息
4、复制目录
/* *复制目录 *@param string $dirSrc 原目录名 *@param string $dirTo 目标目录名 */ function copyDir($dirSrc,$dirTo) { if(is_file($dirTo)) { echo '目标目录不能创建';/*目标不是一个*/ return; } if(!file_exists($dirTo)) { /*目录不存在则创建*/ mkdir($dirTo); } if($dir_handle = @opendir($dirSrc)) { while ($fileName = readdir($dir_handle)) { /*排除两个特殊目录*/ if($fileName != '.' && $fileName != '..') { $subSrcFile = $dirSrc.'/'.$fileName; $subToFile = $dirTo.'/'.$fileName; if(is_file($subSrcFile)) { copy($subSrcFile,$subToFile); } if(is_dir($subSrcFile)) { copyDir($subSrcFile,$subToFile); } } } closedir($dir_handle); return $dirSrc.'目录已经复制到'.$dirTo.'目录'; } } echo copyDir('./test','../testcopy');

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

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

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

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

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

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

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,

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

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

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 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.
