PHP 按行讀取文件內容

public function read_txt()
{
    // 連接文件
    $contents = file_get_contents('E:/en.txt');
    // 獲取文件編碼方式
    $encoding = mb_detect_encoding($contents, array('GB2312', 'GBK', 'UTF-16', 'UCS-2', 'UTF-8', 'BIG5', 'ASCII'));
    // 修改編碼為utf-8 防止亂碼
    $contents = iconv($encoding, 'UTF-8', $contents);
    // 按行分割 返回數組
    $contents = explode("\n", $contents);
    // 去除前后空格
    foreach ($contents as &$info) $info = trim($info);
    // 打印查看結果
    var_dump($contents);
}