Home Backend Development PHP Tutorial Detailed explanation of code implementation of how PHP creates, deletes, and copies files

Detailed explanation of code implementation of how PHP creates, deletes, and copies files

Jul 17, 2017 pm 01:47 PM
php create delete

学习了PHP的文件编程,其中PHP自身提供了复制文件的函数(copy)。先介绍一下使用PHP创建/删除文件夹、文件等知识。

1.创建文件夹

<?php 
 //使用 file_exists("d:/mydir") 或 is_dir("d:/mydir")判断该文件夹是否存在 
 if(!file_exists("d:/mydir")) { 
  if(mkdir("d:/mydir")) { 
   echo "创建文件夹成功"; 
  }else{ 
   echo "创建文件夹失败"; 
  } 
 } else { 
  echo "该文件夹已存在"; 
 } 
?>
Copy after login

2.创建多级目录(上面所说的,只能创建一级目录)

<?php 
 //使用 file_exists("d:/mydir") 或 is_dir("d:/mydir")判断该文件夹是否存在 
 $path="d:/mydir/p/h/p/test"; 
 if(!file_exists($path)) { 
  if(mkdir($path,0777,true)) { 
   echo "创建文件夹成功"; 
  }else{ 
   echo "创建文件夹失败"; 
  } 
 } else { 
  echo "该文件夹已存在"; 
 } 
?>
Copy after login

3.删除文件夹

<?php 
 //如果文件夹下有文件,或者目录,均不能删除成功 
 if(rmdir("d:/mydir/p/h/p/test")) { 
  echo "删除文件夹成功"; 
 } else { 
  echo "删除文件夹成功"; 
 } 
?>
Copy after login

4.文件的创建

<?php 
 //在d:/mydir目录下,创建一个文件并写入hello 
 $file_path="d:/mydir2/test.txt"; 
 $fp=fopen($file_path,"w+"); 
  
 fwrite($fp,"hello,world"); 
 fclose($fp); 
 echo "文件写入成功"; 
?>
Copy after login

5.删除文件

<?php 
 $file_path="d:/mydir2/test.txt"; 
 if(is_file($file_path)) { 
  if(unlink($file_path)) { 
   echo "删除成功"; 
  } else { 
   echo "删除失败"; 
  } 
 } else { 
  echo "文件不存在"; 
 } 
?>
Copy after login

复制文件的函数:

<?php 
 //PHP自身提供的copy文件函数:应用拷贝图片 
 //copy("来源","地点") 
 //$file_path=iconv("utf-8","gb2312","含中文路径"); 
 //将utf-8编码转为gb2312码 
 /*if(!copy("C:\\bh.PNG","D:\\bh2.png")) { 
  echo &#39;error&#39;; 
 } else { 
  echo &#39;ok&#39;; 
 }*/ 
 
 
 //自制拷贝文件的函数 
 function myCopyFunc($res, $des) { 
  if(file_exists($res)) { 
   $r_fp=fopen($res,"r"); 
    
   //定位 
   $pos=strripos($des,"\\"); 
   $dir=substr($des,0,$pos); 
   if(!file_exists($dir)) { 
    //可创建多级目录 
    mkdir($dir,0777,true); 
    echo "创建目录成功<br/>"; 
   } 
 
   $d_fp=fopen($des,"w+"); 
   //$fres=fread($r_fp,filesize($res)); 
 
   //边读边写 
   $buffer=1024; 
   $fres=""; 
   while(!feof($r_fp)) { 
    $fres=fread($r_fp,$buffer); 
    fwrite($d_fp,$fres); 
   } 
 
   fclose($r_fp); 
   fclose($d_fp); 
 
   echo "复制成功"; 
  } else { 
   echo "源文件不存在"; 
  } 
 } 
 
 myCopyFunc("C:\\bh.PNG","D:\\PHPTest\\test\bh2.PNG"); 
 //myCopyFunc("C:\\bh.PNG","D:\\bh.PNG"); 
?>
Copy after login

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