来自foreach的php随机顺序

Question

我有一些foreach，这可以很好地工作

foreach ($umm as $data) {
        echo '<img src="'.$data->picture.'" />';
        echo  $data->id;
}

现在我想洗牌 foreach。我试过:

foreach (shuffle($umm) as $data) {
        echo '<img src="'.$data->picture.'" />';
        echo  $data->id;
}

和

foreach ($umm as $data) {
        $rand_pic[] = $data->picture;
        $rand_id[] = $data->id;
}
$ran = shuffle($rand_id);
foreach($ran as $new){
    echo '<img src="'.$new->picture.'" width="100" />';
    echo $new->id;
}

所有这些都导致了 Warning: Invalid argument supplied for foreach() in second foreach。如何从 foreach 中随机排序？

Answer 1

看看the documentation for shuffle() .它采用对数组的引用 并将其洗牌到位。所以你需要在数组上使用它，然后迭代:

shuffle($umm);

foreach ($umm as $data) {
        echo '<img src="'.$data->picture.'" />';
        echo  $data->id;
}