What potential issues should be considered when renaming multiple files using PHP?

One potential issue to consider when renaming multiple files using PHP is handling file name collisions. If multiple files are being renamed to the same name, it could result in overwriting existing files or causing errors. To solve this issue, you can check if the new file name already exists and append a unique identifier to avoid collisions. 

$files = ['file1.txt', 'file2.txt', 'file3.txt'];
$directory = 'path/to/directory/';

foreach($files as $file){
    $newFileName = 'new_name.txt';
    
    if(file_exists($directory . $newFileName)){
        $newFileName = uniqid() . '_new_name.txt';
    }
    
    rename($directory . $file, $directory . $newFileName);
}

Keywords

file renaming PHP file system error handling loop

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