优雅的PHP变量

Question

赋予for循环的空$ movies数组将产生警告。检查null可以避免这种情况。并不是说我认为这是丑陋或混乱的代码，我只想知道是否有更优雅的方法来处理这些实例。

function get_db_movies($db_handle) {
    $query = "SELECT title FROM movies";
    $result = $db_handle->query($query);
    $movies = null;
    while($row = mysql_fetch_array($result)){
        $movie = new Movie($row['title'], $db_handle);
        $movies[] = $movie;
    }
    return $movies;
}

$movies = get_db_movies($db_handle);

foreach($movies as $movie) {
    $imdbCrawl = new imdbCrawler($movie);
    if($imdbCrawl->verifyMatch() && $imdbCrawl->isMovieFound()) {
        $imdbCrawl->getRating();
        $imdbCrawl->getPlot();
        $movie->syncDatabase();
    } else {
        echo "Movie crawl failed: " . $movie->getTitle();
    }
}

Answer 1

将$ movies初始化为空数组而不是null：

$movies = array();

Answer 2

您可以在使用前初始化数组以避免警告：

$movies = array();