Question

我努力从数组中获取9个随机值，我有这个PHP代码可以正常工作但返回所有值。我只需要用foreach选择9个随机的。

<?php

foreach($gallerystreamobjects as $smallgallery) {   
    $smallgalleryArray = $smallgallery->GalleryPictures;
}

$arr = explode(",", $smallgalleryArray);                

foreach($arr as $value) 
{
    ?>
    <a href="cms/uploads/<?php echo $value;?>" class="swipebox">
        <div class="gallery-item-small" >                           
            <div style="background-image:url('cms/uploads/<?php echo $value;?>')"></div>
        </div>
    </a>
    <?php   
}           
?>

Answer 1

函数array_rand()将解决您的问题：

$randomKeys = array_rand($arr, 9);
foreach($randomKeys AS $key){
    $value = $arr[$key];
    //do whatever you like
}

Answer 2

我设法使用一种快速简便的方法来做到这一点。不是它的正确方法，但是ja，所以我尝试了array_rand（）但是我一直在以最基本的方式获取错误，我发现它与实际上缺失的值有关。这是我目前的解决方案：

<?php

                    $smallgalleryArray = $gallerystreamobjects[0]->GalleryPictures;

                    $arr = explode(",", $smallgalleryArray);            

                    shuffle($arr);
                    $count=0;
                    foreach($arr as $value) {
                        $count++;
                        if($count<10){
                                ?>
                                <a href="cms/uploads/<?php echo $value;?>" class="swipebox">
                                    <div class="gallery-item-small" >                           
                                        <div style="background-image:url('cms/uploads/<?php echo $value;?>')"></div>
                                    </div>
                                </a>
                                <?php   
                            }
                        }           
                    ?>

PHP：从数组中获取9个随机值

2 个答案: