How can individual or all files in a folder be renamed using PHP?

To rename individual or all files in a folder using PHP, you can use the `rename()` function in a loop to iterate through each file and rename it accordingly. You can provide the old file name and the new file name as arguments to the `rename()` function. 

<?php
$folder = 'path/to/folder/';

if ($handle = opendir($folder)) {
    while (false !== ($file = readdir($handle))) {
        if ($file != "." && $file != "..") {
            $old_name = $folder . $file;
            $new_name = $folder . 'new_' . $file;
            rename($old_name, $new_name);
        }
    }
    closedir($handle);
}
?>

Keywords

PHP file handling folder rename loop

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