我正在使用 PHP/MySQL 为相册上传多张图片。与图像相关的信息（文件名、扩展名、描述等）作为 base64 编码数据存储在数据库中。我还可以编辑专辑图片。我现在的问题是，我还想在插入和编辑模式下上传每个图像时为每个图像创建缩略图，并以与图像相同的方式存储缩略图的信息（base64 编码）。最好的方法是什么？谢谢 这是我的代码：
<?php
//Code for the editing albums in database
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']));
$old_timestamp=$old_album['timestamp'];
}
if (isset($_POST['album_name']) && isset($_POST['desc'])) {
$name = mysql_real_escape_string($_POST['album_name']);
$desc = mysql_real_escape_string($_POST['desc']);
$idesc = array();
$target_path = "/uploads/albums/";
foreach ($_FILES as $key => $value) {
foreach ($value as $k => $v) {
if ($k === 'name' && $v !== '') {
break;
} else {
unset($_FILES[$key]);
}
}
//first upload photos
$path = $target_path . basename($old_timestamp.$value['name']);
if(move_uploaded_file($value['tmp_name'], $path)) {
$hasUpload = true;
}
}
for ($j = 1; $j < 21; $j++) {
$img_index = $j;
$img_desc = $_POST['desc_' . $img_index];
array_push($idesc, $img_desc);
}
foreach ($_FILES as $key => $value) {
foreach ($value as $k => $v) {
if ($k=='name' && $v!='') {
break;
} else {
unset($_FILES[$key]);
}
}
}
function merge(&$a, &$b){
$keys = array_keys($a);
foreach($keys as $key){
if(isset($b[$key])){
if(is_array($a[$key]) and is_array($b[$key])){
merge($a[$key],$b[$key]);
}
else{
$a[$key] = $b[$key];
}
}
}
$keys = array_keys($b);
foreach($keys as $key){
if(!isset($a[$key])){
$a[$key] = $b[$key];
}
}
}
for ($i = 1; $i < 21; $i++) {
$file_index = $i;
$file_number = $_POST['image_' . $file_index];
if($_FILES['image_'.$i]['name']!= ''){
$hasUpload = true;
$presults = merge($old_photos, $_FILES);
$dresults = array_merge($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));
$posted = date("Y-m-d H:i:s");
}
}
}
if (mysql_query("update albums set description = '$desc', name = '$name', photos='$images', descriptions='$descriptions' where id='$album_id'")) {
$hasAlbums = true;
} else {
$hasErrors = true;
}
} else {
//Code for the inserting albums in database
if (isset($_POST['album_name'])) {
if (isset($_POST['album_name']) && isset($_POST['desc'])) {
$name = mysql_real_escape_string($_POST['album_name']);
$desc = mysql_real_escape_string($_POST['desc']);
$idesc = array();
$timestamp = time();
$target_path = "/uploads/albums/";
foreach ($_FILES as $k => $v) {
//first upload photos
$path = $target_path . basename($timestamp.$v['name']);
if(move_uploaded_file($v['tmp_name'], $path)) {
$img_index = explode('_', $k);
$img_index = $img_index[1];
$img_desc = $_POST['desc_' . $img_index];
array_push($idesc, $img_desc);
$file_name = $timestamp.$v['name'];
$hasUpload = true;
}
}
$images = base64_encode(serialize($_FILES));
$descriptions = base64_encode(serialize($idesc));
$posted = date("Y-m-d H:i:s");
$query = mysql_query("
INSERT INTO albums (description, posted, photos, name, descriptions, timestamp)
VALUES ('$desc', '$posted', '$images', '$name', '$descriptions', '$timestamp')
");
}
}
}
?>