我有一个相册,数据库中有一个“照片”字段,该字段具有序列化数据并且是 base 64 编码的。相册最多可以同时上传21张照片(多张上传)。在编辑模式下尝试将新照片添加到相册时,我无法让新的 $_FILES 数组与数据库中的旧数组合并。我只想更新已更改的值。因此,假设我的相册中已经有 2 张图片,我想添加第三张图片而不会丢失其他 2 张图片。我知道我需要使用 unset() 删除空值,但我认为我没有正确执行。这是我的代码:
if (isset($_REQUEST['action']) && $_REQUEST['action'] == 'edit') {
//select photo album and get photos and descriptions to be merged with new.
$album_id = $_REQUEST['album_id'];
$old_photos = null;
$old_descriptions = null;
$getAlbumQ = mysql_query("select * from albums where id='$album_id'");
while ($old_album = mysql_fetch_array($getAlbumQ)) {
$old_photos = unserialize(base64_decode($old_album['photos']));
$old_descriptions = unserialize(base64_decode($old_album['descriptions']));
}
if (isset($_POST['album_name']) && isset($_POST['desc'])) {
$name = $_POST['album_name'];
$desc = $_POST['desc'];
$idesc = array();
$target_path = "../uploads/albums/";
foreach ($_FILES as $k => $v) {
//first upload photos
$path = $target_path . basename($v['name']);
if(move_uploaded_file($v['tmp_name'], $path)) {
$hasUpload = true;
}
}
for ($j = 1; $j < 21; $j++) {
$img_index = $j;
$img_desc = $_POST['desc_' . $img_index];
$asdf = $_FILES['image_' . $img_index]['name'];
array_push($idesc, $img_desc);
}
foreach( $_FILES['images']['name'] as $key => $value ) {
if( empty($value) ) {
unset( $_FILES['images']['name'][$key] );
}
}
for ($i = 1; $i < 21; $i++) {
if($_FILES['image_'.$i]['name']!= '')
{
$hasUpload = true;
$presults = array_merge($old_photos, $_FILES); //THE PROBLEM WITH MERGING ARRAYS OCCURS HERE
$dresults = array_merge($old_descriptions, $idesc);
$images = base64_encode(serialize($presults));
$descriptions = base64_encode(serialize($dresults));
$posted = date("Y-m-d H:i:s");
}
else {
$hasUpload = false;
$presults = $old_photos;
$dresults = $idesc;
$images = base64_encode(serialize($presults));
$descriptions = base64_encode(serialize($dresults));
$posted = date("Y-m-d H:i:s");
}
}
}
}