How to use PHP for file and folder operations

How to use PHP to implement file and folder operations

PHP is a popular server-side scripting language. Its powerful file and folder operation functions make it an ideal choice for development The first choice of readers. This article will introduce in detail how to use PHP to implement common operations on files and folders, including creating, reading, writing, copying, deleting, and renaming.

1. Create Folder

In PHP, you can use the mkdir() function to create a new folder. This function accepts two parameters, the first parameter is the path to the folder to be created, and the second parameter is an optional parameter for setting permissions.

$folderPath = 'path/to/folder'; // 文件夹路径
$permissions = 0777; // 权限设置

if (!file_exists($folderPath)) {
    mkdir($folderPath, $permissions);
    echo '文件夹创建成功！';
} else {
    echo '文件夹已存在！';
}

2. Create File

Use PHP’s fopen() function to create a new file. This function accepts two parameters, the first parameter is the path of the file to be created, and the second parameter is the mode for opening the file.

$filePath = 'path/to/file.txt'; // 文件路径
$mode = 'w'; // 模式，w 表示写入

$file = fopen($filePath, $mode);

if ($file) {
    echo '文件创建成功！';
    fclose($file);
} else {
    echo '文件创建失败！';
}

3. Writing to a file

To write content to a file, you can use PHP's fwrite() function. This function accepts three parameters, the first parameter is the file pointer, the second parameter is the content to be written, and the third parameter is an optional parameter used to set the number of bytes written.

$filePath = 'path/to/file.txt'; // 文件路径

$file = fopen($filePath, 'w');

if ($file) {
    $content = "这是要写入的内容";
    fwrite($file, $content);
    echo '文件写入成功！';
    fclose($file);
} else {
    echo '文件写入失败！';
}

4. Reading files

To read the contents of a file, you can use PHP's file_get_contents() function. This function accepts one parameter, which is the path of the file to be read.

$filePath = 'path/to/file.txt'; // 文件路径

$content = file_get_contents($filePath);

if ($content !== false) {
    echo '文件内容：' . $content;
} else {
    echo '文件读取失败！';
}

5. Copy files

Use PHP’s copy() function to copy files. This function accepts two parameters, the source file to be copied and the target file path.

$sourceFile = 'path/to/source.txt'; // 源文件路径
$destinationFile = 'path/to/destination.txt'; // 目标文件路径

if (copy($sourceFile, $destinationFile)) {
    echo '文件复制成功！';
} else {
    echo '文件复制失败！';
}

6. Delete a folder

If you need to delete a folder and all files and subfolders in it, you can use PHP's rmdir() function. This function accepts one parameter, which is the path of the folder to be deleted.

$folderPath = 'path/to/folder'; // 文件夹路径

if (rmdir($folderPath)) {
    echo '文件夹删除成功！';
} else {
    echo '文件夹删除失败！';
}

7. Delete files

To delete files, you can use PHP’s unlink() function. This function accepts one parameter, which is the path of the file to be deleted.

$filePath = 'path/to/file.txt'; // 文件路径

if (unlink($filePath)) {
    echo '文件删除成功！';
} else {
    echo '文件删除失败！';
}

8. Renaming files

To rename a file, you can use PHP's rename() function. This function accepts two parameters, the first parameter is the path of the file to be renamed, and the second parameter is the new file name.

$oldName = 'path/to/file.txt'; // 旧文件名
$newName = 'path/to/newname.txt'; // 新文件名

if (rename($oldName, $newName)) {
    echo '文件重命名成功！';
} else {
    echo '文件重命名失败！';
}

Through the above sample code, we can see how to use PHP to implement common operations on files and folders. In actual applications, it can be modified and expanded according to specific needs to achieve more complex file and folder operation functions.

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