Use PHP to batch rename files in a folder, starting from number 1 while keeping the file extensions unchanged.

function:

function renameFiles($dir) {
  // 获取目录下所有文件
  $files = glob($dir . '/*');

  if (empty($files)) {
    return;
  }

  $i = 1;
  foreach ($files as $file) {
    // 获取文件的扩展名
    $ext = pathinfo($file, PATHINFO_EXTENSION);

    // 新文件名
    $newName = $dir . '/' . $i . '.' . $ext;

    // 重命名文件
    if (file_exists($newName)) {
      continue; // 如果新文件名已存在，则跳过
    }
    rename($file, $newName);

    $i++;
  }
}

This function accepts a single parameter. $dirThe directory path containing the files to be batch-renamed. The function first uses glob() The function retrieves the file paths of all files within a specified directory. Then, the function uses a loop to iterate through all files and generates a new file name for each file. The format of the new file name is: $i.jpg,among $i An increasing numerical sequence number. If the new file name already exists, the file will be skipped, and the renaming operation will not be performed.

You can call this function using the following methods:

$dir = '/path/to/files';
renameFiles($dir);

among,/path/to/files This specifies the directory path for batch renaming of files. After calling this function, it will rename all files within that directory, assigning new filenames starting from 1 and incrementing sequentially.