PHP directory operations

//basename()
Return the file name part of the path
$path="D:/lamp/apache2/htdocs/file.php";
echo basename($path). "";
//Display the file name with the file extension
echo basename($path,'php')."";
//Display the file name without the file extension
//dirname()
Remove the file name and return the directory name
echo dirname($path)."";
//Return the directory name
//pathinfo()
Return an array of path attributes
 print_r(pathinfo($path))."";
//opendir()
Open the specified directory
//readdir()
Read the specified directory
//closedir()
Close the specified directory
//rewinddir()
Rewind the directory handle
/*
*The following code is used to count the files in a directory
*/
$num=0;
//It is used to count the total number of subdirectories and files
 $dirname="pm3";
//Define a directory, that is, the directory that needs to be traversed
$dir_handle=opendir($dirname);
//Open the directory
//Output the traversed content and file names in table format
echo "";echo "";echo "";echo "> ;";while($file=readdir($ dir_handle)){//Loop through the contents of the directory until the end$dirFile=$dirname."/".$file;//Link the directory name and file name so that it can be used in the following filetype if($num++%2==0){//Realize interlaced colors through singular and plural numbers$bgcolor="#ffffff";}else{$bgcolor="#cccccc";}echo "< ;tr bgcolor='".$bgcolor."'>";echo "";//Output file nameecho "";//Output file sizeecho "";//Output file type echo "";//Output the modification time of the fileecho "";}echo "Directory".$dirname. "Content under
File nameFile size
File type
Modification time













".$file."

" .filesize($dirFile)."

".filetype($dirFile)."

".filemtime($dirFile)."




> ;";
closedir($dir_handle);
echo "There are ".$num." files in the directory ".$dirname."";
//disk_free_space ()
disk_total_space() Count disk size
/*
*Customize a recursive function to count the size of incoming directory files
*/
function dirSize($directory){
$dir_size=0;
//Define an integer Variable, used to accumulate the size of each file to calculate the size of the directory
if($dir_handle=opendir($directory)){
//Open the directory
while($fileName=readdir($dir_handle)){
// Loop through the files in the directory
if($fileName!="." && $fileName!=".."){
//Be sure to exclude two special directories
$subFile=$directory."/" .$fileName;
//Connect the file name and directory name
if(is_dir($subFile)){
//Determine whether the sub-file is a directory
$dir_size+=dirSize($subFile);
//If it is a directory, continue Loop downward
}
if(is_file($subFile)){
//Determine whether it is a normal file
$dir_size+=filesize($subFile);
//Get the size of the file and add it to the previous file size
}
}
}
}
closedir($dir_handle);
//The handle of the closed directory
return $dir_size;
}
$dir_size=dirSize("pm3");
echo "The size of directory pm3 is:".round ($dir_size/pow(1024,2),2)."MB";
//The size of the output directory
/*
*Customize a recursive function to delete the directory
*/
//unlink()
Unlink()
 Delete the files in
function delDir($directory){
if(file_exists($directory)){
//Determine whether the directory exists
if($dir_handle=opendir($directory)){
//Open the directory
while ($fileName=readdir($dir_handle)){
//Loop to read files in the directory
if($fileName!="." && $fileName!=".."){
//Be sure to exclude two Special file, otherwise you will regret it
$subFile=$directory."/".$fileName;
//Connect the file name and directory name
if(is_dir($subFile)){
//If it is a directory, continue The execution itself
delDir($subFile);
}
if(is_file($subFile)){
//If it is an ordinary file, delete it directly
unlink($subFile);
}
}
}
closedir($dir_handle) ;
//Close the handle
rmdir($directory);
//The directory you run here is already an empty directory, delete it directly
}
}🎜}
//delDir("pm4");
/*
*Customize a recursive function to copy or move a directory
*/
//copy()
Copy an ordinary file
//mkdir()
Create a directory
function copyDir($directory,$dirTo){
//Two parameters, one is the source directory and the other is the target directory
if(is_file($dirTo)){
//Judge if the target is an ordinary file, then directly Exit method
echo "The target is not a directory and the copy cannot be completed";
return;
}
if(!file_exists($dirTo)){
//Judge if the directory does not exist, then create the directory
mkdir($dirTo) ;
}
if($dir_handle=opendir($directory)){
while($fileName=readdir($dir_handle)){
if($fileName!="." && $fileName!=".."){
$subFile=$directory."/".$fileName;
$subToFile=$dirTo."/".$fileName;
if(is_dir($subFile)){
copyDir($subFile,$subToFile);
}
if(is_file($subFile)){
copy($subFile,$subToFile);
}
}
}
closedir($dir_handle);
}
}
copyDir("pm3","pm4");
 ?>

PHP