Loading... In this tutorial you will learn how to process directories or folders using PHP. ## Working with Directories in PHP In the previous chapter you’ve learned how to work with files in PHP. Similarly, PHP also allows you to work with directories on the file system, for example, you can open a directory and read its contents, create or delete a directory, list all files in the directory, and so on. ## Creating a New Directory You can create a new and empty directory by calling the PHP mkdir() function with the path and name of the directory to be created, as shown in the example below: ```php <?php // The directory path $dir = "testdir"; // Check the existence of directory if(!file_exists($dir)){ // Attempt to create directory if(mkdir($dir)){ echo "Directory created successfully."; } else{ echo "ERROR: Directory could not be created."; } } else{ echo "ERROR: Directory already exists."; } ?> ``` To make the mkdir() function work, the parent directories in the directory path parameter has to exist already, for example, if you specify the directory path as testdir/subdir than the testdir has to exist otherwise PHP will generate an error. ## Copying Files from One Location to Another You can copy a file from one location to another by calling PHP copy() function with the file’s source and destination paths as arguments. If the destination file already exists it’ll be overwritten. Here’s an example which creates a copy of “example.txt” file inside backup folder. ```php <?php // Source file path $file = "example.txt"; // Destination file path $newfile = "backup/example.txt"; // Check the existence of file if(file_exists($file)){ // Attempt to copy file if(copy($file, $newfile)){ echo "File copied successfully."; } else{ echo "ERROR: File could not be copied."; } } else{ echo "ERROR: File does not exist."; } ?> ``` > Tip：To make this example work, the target directory which is backup and the source file i.e. “example.txt” has to exist already; otherwise PHP will generate an error. ## Listing All Files in a Directory You can use the PHP scandir() function to list files and directories inside the specified path. Now we’re going to create a custom function that will recursively list all files in a directory using PHP. This script will be helpful if you’re working with deeply nested directory structure. ```php <?php // Define a function to output files in a directory function outputFiles($path){ // Check directory exists or not if(file_exists($path) && is_dir($path)){ // Scan the files in this directory $result = scandir($path); // Filter out the current (.) and parent (..) directories $files = array_diff($result, array('.', '..')); if(count($files) > 0){ // Loop through retuned array foreach($files as $file){ if(is_file("$path/$file")){ // Display filename echo $file . "<br>"; } else if(is_dir("$path/$file")){ // Recursively call the function if directories found outputFiles("$path/$file"); } } } else{ echo "ERROR: No files found in the directory."; } } else { echo "ERROR: The directory does not exist."; } } // Call the function outputFiles("mydir"); ?> ``` ## Listing All Files of a Certain Type While working on directory and file structure, sometimes you might need to find out certain types of files within the directory, for example, listing only .text or .png files, etc. You can do this easily with the PHP glob() function, which matches files based on the pattern. The PHP code in the following example will search the documents directory and list all the files with .text extension. It will not search the subdirectories. ```php <?php /* Search the directory and loop through returned array containing the matched files */ foreach(glob("documents/*.txt") as $file){ echo basename($file) . " (size: " . filesize($file) . " bytes)" . "<br>"; } ?> ``` The glob() function can also be used to find all the files within a directory or its subdirectories. The function defined in the following example will recursively list all files within a directory, just like we’ve done in previous example with the scandir() function. ```php <?php // Define a function to output files in a directory function outputFiles($path){ // Check directory exists or not if(file_exists($path) && is_dir($path)){ // Search the files in this directory $files = glob($path ."/*"); if(count($files) > 0){ // Loop through retuned array foreach($files as $file){ if(is_file("$file")){ // Display only filename echo basename($file) . "<br>"; } else if(is_dir("$file")){ // Recursively call the function if directories found outputFiles("$file"); } } } else{ echo "ERROR: No such file found in the directory."; } } else { echo "ERROR: The directory does not exist."; } } // Call the function outputFiles("mydir"); ?> ``` Last modification：September 11, 2024 © Allow specification reprint Like 如果觉得我的文章对你有用，请随意赞赏