PHP Create/delete/copy folders, file _php tips

Learn PHP's file programming, in which PHP itself provides a copy of the copied file function (copy). I also wrote a function similar to the copy of the picture function, as a record here.
Before you say this function, introduce the knowledge of creating/deleting folders, files, and so on using PHP.
1. Create a folder

<?php 
 //Use File_exists ("D:/mydir") or Is_dir ("D:/mydir") to determine if the folder exists 
 if (!file_exists ("D:/mydir")) { 
  if (MkDir ("D:/mydir")) { 
   echo "Create folder succeeded"; 
  } else{ 
   echo "Create folder Failed"; 
  } 
 } else { 
  echo "This folder already exists"; 
 } 

2. Create a multilevel directory (above, you can only create a level of directory)

<?php 
 //Use File_exists ("D:/mydir") or Is_dir ("D:/mydir") to determine whether the folder exists 
 $path = "D:/mydir/p/h/p/test"; 
 if (!file_exists ($path)) { 
  if (mkdir ($path, 0777,true)) { 
   echo "Create folder succeeded"; 
  } else{ 
   echo "Create folder Failed"; 
  } 
 } else { 
  echo "This folder already exists"; 
 } 
? > 

3. Delete Folder

<?php 
 //If there are files or directories under the folder, you cannot delete the success 
 if (RmDir ("D:/mydir/p/h/p/test")) { 
  echo Delete folder succeeded; 
 } else { 
  echo "Delete folder succeeded"; 
 } 

4. Creation of documents

<?php 
 //In D:/mydir directory, create a file and write Hello 
 $file _path= "D:/mydir2/test.txt"; 
 $FP =fopen ($file _path, "w+"); 
  
 Fwrite ($fp, "Hello,world"); 
 Fclose ($FP); 
 echo "File write succeeded"; 
? >

5. Delete Files

<?php 
 $file _path= "D:/mydir2/test.txt"; 
 if (Is_file ($file _path)) { 
  if (unlink ($file _path)) { 
   echo "delete succeeded"; 
  } else { 
   echo "delete failed"; 
  } 
 } else { 
  echo "file does not exist"; 
 } 

Functions for copying files:

 <?php//php itself provides copy file functions: Apply Copy Picture//copy ("source", "place")//$file _path=iconv ("Utf-8", "GB 
 2312 "," including Chinese path "); Converts the UTF-8 encoding into gb2312 code/*if (!copy ("C:\\bh"). 
 PNG "," D:\\bh2.png ")) {echo ' error '; 
 else {echo ' OK '; 
    
   }*///self-made Copy file functions function Mycopyfunc ($res, $des) {if (file_exists ($res)) {$r _fp=fopen ($res, "R"); 
   Positioning $pos =strripos ($des, "\ \"); 
   $dir =substr ($des, 0, $pos); 
    if (!file_exists ($dir)) {//can create multilevel directory mkdir ($dir, 0777,true); 
   echo "Create directory success <br/>"; 
   $d _fp=fopen ($des, "w+"); 
 
   $fres =fread ($r _fp,filesize ($res)); 
   Side-read side write $buffer = 1024; 
   $fres = ""; 
    while (!feof ($r _fp)) {$fres =fread ($r _fp, $buffer); 
   Fwrite ($d _fp, $fres); 
   } fclose ($r _fp); 
 
   Fclose ($d _fp); 
  echo "Copy succeeded"; 
  else {echo ' source file does not exist '; } mycopyfunc ("C:\\bh. PNG "," D:\\PHPTEST\\TEST\BH2. 
 PNG "); Mycopyfunc ("C:\\BH.") PNG "," D:\\BH. 
PNG "); ?> 

The above code contains the file reading and writing functions in PHP file programming, and I hope you can learn PHP program design to help.