PHP的-比这更快,更有效的代码？ (抓取9个唯一的随机行)

注意：我是PHP初学者,因此下面的代码可能很糟糕.

你好我目前正在使用此代码选择9个唯一的随机行,并且工作正常.

$quCountRows = $database->query("SELECT * FROM approved")->rowCount();
$arrRandomPictures = array();
while (count($arrRandomPictures) < 9) {
    $randNumber = mt_rand(1, $quCountRows);
    if (!in_array($randNumber, $arrRandomPictures)) {
        $arrRandomPictures[] = $randNumber;
    }
}
$quRandomPicture1 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[0]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture2 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[1]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture3 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[2]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture4 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[3]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture5 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[4]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture6 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[5]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture7 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[6]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture8 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[7]."'")->fetch(PDO::FETCH_ASSOC);
$quRandomPicture9 = $database->query("SELECT picName,picType FROM approved WHERE id='".$arrRandomPictures[8]."'")->fetch(PDO::FETCH_ASSOC);

尽管它可能有效,但我敢肯定,用更少的查询就能获得相同的结果.希望这会导致页面加载更快.

有什么建议么？

这是更好的代码.多亏了琥珀！

$quCountRows = $database->query("SELECT * FROM approved")->rowCount();
$arrRandomPictures = array();
while (count($arrRandomPictures) < 9) {
    $randNumber = mt_rand(1, $quCountRows);
    if (!in_array($randNumber, $arrRandomPictures)) {
        $arrRandomPictures[] = $randNumber;
    }
}
$quRandomPicture = $database->query("SELECT picName,picType FROM approved WHERE id IN (".implode(', ', $arrRandomPictures).")")->fetchAll(PDO::FETCH_ASSOC);

解决方法:

使用in代替==并传递ID列表.这样,您可以从一个查询而不是9中获取所有结果.