Question

我尝试做的是获取$streamitem_imageuploaded值，以便将其传递到$json数组中。这与嵌套循环有什么关系吗？当我当前发回我的json数据时，我得到的是未定义的变量$streamitem_imageuploaded，代码如下。

if($checkphoto_id['photo_id']==0){
    $sqlhhh = "SELECT * FROM userphotos WHERE photo_name='".$checkphoto_id['photo_title']."' AND photo_ownerid='".$checkphoto_id['streamitem_creator']."' AND photo_datetime='".$checkphoto_id['streamitem_timestamp']."' ORDER BY photo_id ASC";
    $resulthhh = mysqli_query ($mysqli,$sqlhhh)or die(mysqli_error($mysqli)); 
    $photo_num=mysqli_num_rows($resulthhh);
    $images = array();
    while ($rowhhh = mysqli_fetch_assoc($resulthhh)) {
        $imageArray = array(
                            'data' => $rowhhh['photo_imagedata'],
                            'photo_streamitem_id' => $rowhhh['photo_streamitem_id'],
                            'id' => $rowhhh['photo_id']
                            );
        $images[] = $imageArray;
    }
    foreach ($images as  $image) {
        if($photo_num==1){
            $streamitem_imageuploaded='<a href="photo.php?pid='.$image['id'].'&streamitem_id='.$image['photo_streamitem_id'].'"><img class="stream_images" style="width:200px;height:200px;object-fit:cover;margin:2px;padding:2px;" src="data:image/jpeg;base64,'. base64_encode($image['data']) .'" /></a>';
        }else{
            $streamitem_imageuploaded[]='<a href="photo.php?pid='.$image['id'].'&streamitem_id='.$image['photo_streamitem_id'].'"><img class="stream_images" style="width:100px;height:100px;object-fit:cover;margin:2px;padding:2px;" src="data:image/jpeg;base64,'. base64_encode($image['data']) .'" /></a>';
        }
    }
}

将输出的值存储在我的$ json数组

中

$json = array(
    'posts' => array(),
    'count' => $rowcount,
    'commentlinktoggle' => $sendcommentlinktoggle,
    'streamitem_formholder' => $streamitem_formholder,
    'stopcommentsbutton' => $stopcommentsbutton,
    'streamitem_uploadimage_count' => $streamitem_uploadimage_count,
    'streamitem_imageuploaded' => $streamitem_imageuploaded,
);

更新

编辑已更改且仍获得相同的结果

if($photo_num==0){
    $streamitem_imageuploaded='';
}
if($photo_num==1){
    $streamitem_imageuploaded='<a href="photo.php?pid='.$image['id'].'&streamitem_id='.$image['photo_streamitem_id'].'"><img class="stream_images" style="width:200px;height:200px;object-fit:cover;margin:2px;padding:2px;" src="data:image/jpeg;base64,'. base64_encode($image['data']) .'" /></a>';
}
if($photo_num>1){
    $streamitem_imageuploaded[]='<a href="photo.php?pid='.$image['id'].'&streamitem_id='.$image['photo_streamitem_id'].'"><img class="stream_images" style="width:100px;height:100px;object-fit:cover;margin:2px;padding:2px;" src="data:image/jpeg;base64,'. base64_encode($image['data']) .'" /></a>';
}

此代码在标准的php页面中工作没有问题。只是在尝试从数组内部调用变量时。

Answer 1

这应该有效。添加了一些静态值来模拟事物。这样可以正常运行，而不会为$ streamitem_imageuploaded var生成未定义的内容。所以问题必须出在你的mysql代码或其他条件中。

$rowhhh =1;
$photo_num = 1;
$images = array();
  if ($rowhhh == 1) {
    $imageArray = array(
                        'data' => $rowhhh['photo_imagedata'],
                        'photo_streamitem_id' => $rowhhh['photo_streamitem_id'],
                        'id' => $rowhhh['photo_id']
                        );
    $images[] = $imageArray;
}
foreach ($images as  $image) {
    if($photo_num==1){
        $streamitem_imageuploaded='<a href="photo.php?pid='.$image['id'].'&streamitem_id='.$image['photo_streamitem_id'].'"><img class="stream_images" style="width:200px;height:200px;object-fit:cover;margin:2px;padding:2px;" src="data:image/jpeg;base64,'. base64_encode($image['data']) .'" /></a>';
    }else{
        $streamitem_imageuploaded[]='<a href="photo.php?pid='.$image['id'].'&streamitem_id='.$image['photo_streamitem_id'].'"><img class="stream_images" style="width:100px;height:100px;object-fit:cover;margin:2px;padding:2px;" src="data:image/jpeg;base64,'. base64_encode($image['data']) .'" /></a>';
    }
}
$json = array(
'posts' => array(),
'count' => $rowcount,
'commentlinktoggle' => $sendcommentlinktoggle,
'streamitem_formholder' => $streamitem_formholder,
'stopcommentsbutton' => $stopcommentsbutton,
'streamitem_uploadimage_count' => $streamitem_uploadimage_count,
'streamitem_imageuploaded' => $streamitem_imageuploaded,
);
print_r($json);

Answer 2

我需要做的就是在foreach循环外添加一个数组，然后在我的$ json数组中调用它

    $streamitem_imageuploaded = array();

我在研究我的答案时使用了这个。 Return all values stored in var outside foreach loop

从foreach循环内部调用变量以放入数组内部

2 个答案: