search
HomeBackend DevelopmentPHP TutorialPHP学习笔记之php文件操作_php实例

一、fstat函数:显示文件的所有信息

$file_path = "test.php";
if($fp=fopen($file_path,"a+")){
  $file_info=fstat($fp);
  echo "<pre class="brush:php;toolbar:false">";
  print_r($file_info);
  echo "
"; echo "文件大小为".$file_info['size']; echo "文件上次访问时间".date("Y-m-d H:i:s",$file_info['mtime']); } fclose($fp); //一定要关闭

  二、文件读取:

//第一种:
$con = fread($fp,filesize($file_path));
$con = str_replace("\r\n","<br>",$con);
echo "文件内容是".$con;
//第二种:将文件一下全部读取
$con = file_get_contents($file_path);
$con = str_replace("\r\n","<br>",$con);
echo "文件内容是".$con;
//第三种:一段一段读取
$buffer = 1024; 
//为了下载的安全,最好使用文件字节读取计数器
$file_count = 0;
//feof用于判断文件是否读取到文档尾
while(!feof($fp) && ($file_size-$file_count>0)){
$file_data = fread($fp,$buffer);
//统计读了多少个字节
$file_count+$buffer;
echo $file_data;  
} 

  三、写入文件:

 //1、传统方法写入文件
  $file_path = "test.txt";
  if(file_exists($file_path)){
    $fp = fopen($file_path,"a+");
    //打开方式:a+是追加内容。w+是覆盖原来的。
    $con = "Hello!\r\n";
    fwrite($fp,$con);
    echo "添加成功!";
  }else{
    echo "文件不存在";
  }
  fclose($fp);
  //2、第二种方法写入文件
  $file_path= "test.txt";
  $con = "北京你好!\r\n";
  file_put_contents($file_path,$con,FILE_APPEND);
  echo "成功"; 

  四、文件操作的应用:

//可以操作ini文件。将服务器的配置写在ini文件中,再对其进行操作。
  dbc.ini
  host=192.168.0.1
  admin=admin
  password=123456  
demo.php
  <&#63;php
    $con = parse_ini_file("dbc.ini");
    print_r($con);  
    &#63;> 
//将ini文件中的数据以数组形式读出,可以对其进行操作。 

  五、拷贝文件:

if(!copy("E:\\test.txt","D:\\1.txt")){
  echo "fail";
}else{
  echo "success";
} 

  六、创建文件

  创建文件夹:

//$path = "E:\\happy"; //文件夹路径
$path = "E:\\happy\aaa\bbb"; //多级文件夹
if(!is_dir($path)){
  if(mkdir($path,0777,true)){
    echo "success";
  }else{
    echo "fail";
  }
}else{
  echo "文件夹已存在";
} 

  创建文件:

$file_path = "E:\\happy.txt";
$fp = fopen($file_path,"w+");
fwrite($fp,"hello");
fclose($fp); 

  七、删除文件:

  删除文件夹:

$path = "E:\\happy\aaa\bbb"; //多级文件夹
if(rmdir($path)){
  echo "success";
}
//rmdir只能删除空文件夹,文件夹下有文件或目录均不能删除。 

    删除文件:

$file_path = "E:\\happy.txt";
if(is_file($file_path)){
  if(unlink($file_path)){
    echo "success";
  }else{
    echo "fail";
  }
}else{
  echo "文件不存在";
}

以上所述是小编给大家介绍的php文件操作的相关知识,希望对大家有所帮助。

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
PHP Performance Tuning for High Traffic WebsitesPHP Performance Tuning for High Traffic WebsitesMay 14, 2025 am 12:13 AM

ThesecrettokeepingaPHP-poweredwebsiterunningsmoothlyunderheavyloadinvolvesseveralkeystrategies:1)ImplementopcodecachingwithOPcachetoreducescriptexecutiontime,2)UsedatabasequerycachingwithRedistolessendatabaseload,3)LeverageCDNslikeCloudflareforservin

Dependency Injection in PHP: Code Examples for BeginnersDependency Injection in PHP: Code Examples for BeginnersMay 14, 2025 am 12:08 AM

You should care about DependencyInjection(DI) because it makes your code clearer and easier to maintain. 1) DI makes it more modular by decoupling classes, 2) improves the convenience of testing and code flexibility, 3) Use DI containers to manage complex dependencies, but pay attention to performance impact and circular dependencies, 4) The best practice is to rely on abstract interfaces to achieve loose coupling.

PHP Performance: is it possible to optimize the application?PHP Performance: is it possible to optimize the application?May 14, 2025 am 12:04 AM

Yes,optimizingaPHPapplicationispossibleandessential.1)ImplementcachingusingAPCutoreducedatabaseload.2)Optimizedatabaseswithindexing,efficientqueries,andconnectionpooling.3)Enhancecodewithbuilt-infunctions,avoidingglobalvariables,andusingopcodecaching

PHP Performance Optimization: The Ultimate GuidePHP Performance Optimization: The Ultimate GuideMay 14, 2025 am 12:02 AM

ThekeystrategiestosignificantlyboostPHPapplicationperformanceare:1)UseopcodecachinglikeOPcachetoreduceexecutiontime,2)Optimizedatabaseinteractionswithpreparedstatementsandproperindexing,3)ConfigurewebserverslikeNginxwithPHP-FPMforbetterperformance,4)

PHP Dependency Injection Container: A Quick StartPHP Dependency Injection Container: A Quick StartMay 13, 2025 am 12:11 AM

APHPDependencyInjectionContainerisatoolthatmanagesclassdependencies,enhancingcodemodularity,testability,andmaintainability.Itactsasacentralhubforcreatingandinjectingdependencies,thusreducingtightcouplingandeasingunittesting.

Dependency Injection vs. Service Locator in PHPDependency Injection vs. Service Locator in PHPMay 13, 2025 am 12:10 AM

Select DependencyInjection (DI) for large applications, ServiceLocator is suitable for small projects or prototypes. 1) DI improves the testability and modularity of the code through constructor injection. 2) ServiceLocator obtains services through center registration, which is convenient but may lead to an increase in code coupling.

PHP performance optimization strategies.PHP performance optimization strategies.May 13, 2025 am 12:06 AM

PHPapplicationscanbeoptimizedforspeedandefficiencyby:1)enablingopcacheinphp.ini,2)usingpreparedstatementswithPDOfordatabasequeries,3)replacingloopswitharray_filterandarray_mapfordataprocessing,4)configuringNginxasareverseproxy,5)implementingcachingwi

PHP Email Validation: Ensuring Emails Are Sent CorrectlyPHP Email Validation: Ensuring Emails Are Sent CorrectlyMay 13, 2025 am 12:06 AM

PHPemailvalidationinvolvesthreesteps:1)Formatvalidationusingregularexpressionstochecktheemailformat;2)DNSvalidationtoensurethedomainhasavalidMXrecord;3)SMTPvalidation,themostthoroughmethod,whichchecksifthemailboxexistsbyconnectingtotheSMTPserver.Impl

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

Video Face Swap

Video Face Swap

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

Hot Article

Hot Tools

PhpStorm Mac version

PhpStorm Mac version

The latest (2018.2.1) professional PHP integrated development tool

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

ZendStudio 13.5.1 Mac

ZendStudio 13.5.1 Mac

Powerful PHP integrated development environment

VSCode Windows 64-bit Download

VSCode Windows 64-bit Download

A free and powerful IDE editor launched by Microsoft

WebStorm Mac version

WebStorm Mac version

Useful JavaScript development tools