Rename songs

php-rename-songs.php

<?php

/*
* I have many .mp3 files with naming rule is: <song's name> - <singer's name> [MP3 320kbps].mp3. Ex: Dao Nguyen - NSUT Thuy Huong [MP3 320kbps].mp3
* I want to rename them using new naming rule is: <song's name>.mp3. Ex: Dao_Nguyen.mp3
*/

date_default_timezone_set('Asia/Ho_Chi_Minh');

$dir = "directory";
if (!is_dir($dir))
    exit($dir . "is not a directory" . PHP_EOL);

$files = scandir($dir);
foreach ($files as $file) {
    $file_path = $dir . $file;
    if (is_file($file_path)) {
        $pieces = explode("-", $file);
        $new_name = str_replace(" ", "_", trim($pieces[0]));
        rename($file_path, $dir . $new_name . ".mp3");
    }
}