我有一些 foreach,这可以很好地工作
I have some foreach, this could work well
foreach ($umm as $data) {
echo '<img src="'.$data->picture.'" />';
echo $data->id;
}
现在我想洗牌 foreach.我试过了:
Now I want shuffle the foreach. I tried:
foreach (shuffle($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 $new->id;
}
所有这些都导致了 Warning: Invalid argument provided for foreach()
在第二个 foreach
中.如何从 foreach 中随机排序?
All these caused Warning: Invalid argument supplied for foreach()
in second foreach
. How to random order from a foreach?
查看 shuffle()
.它接受一个对数组的 reference 并将其改组到位.所以需要在数组上使用,然后迭代:
Take a look at the documentation for shuffle()
. It takes a reference to an array and shuffles it in place. So you need to use it on the array, then iterate:
shuffle($umm);
foreach ($umm as $data) {
echo '<img src="'.$data->picture.'" />';
echo $data->id;
}
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