在我的php文件中使用文件上传控件。取消链接以前的文件并使用新文件更新后，它不会使用新的图像文件进行更新。当我刷新它显示新图像时，它显示了列表中的上一个图像。在单个php文件中使用列表和更新屏幕。我用文件缓存清除了。即使它不起作用。
<?php
require_once("../config/config.php");
header("Cache-Control: no-cache, must-revalidate");
header("Expires: Mon, 26 Jul 1997 05:00:00 GMT");
<?php
require_once("../images.inc.php");
if(Tools::isLoggedIn('admin') == false)
{
Tools::redirectTo($link->rewrite_link(array("template"=>ADMIN_URI."index")));
}
$id_product = (Tools::getVar("id_product")) ? Tools::getVar("id_rpoduct") : 0;
$page = intval(Tools::getVar("page"));
$product = new Product($id_product);
if(Tools::isSubmit("OnSave"))
{
$id_product = Tools::getVar("id_product");
$product = new Product($id_product);
$product->name = Tools::getVar("name");
$product->id_category = Tools::getVar("id_category");
$product->short_description = Tools::getVar("short_description");
$product->code = Tools::getVar("code");
$product->weight = Tools::getVar("weight");
$product->price = Tools::getVar("price");
$product->size = Tools::getVar("size");
$product->meta_title = Tools::getVar("meta_title");
$product->meta_description = Tools::getVar("meta_description");
$product->meta_keyword = Tools::getVar("meta_keyword");
$product->status = Tools::getVar("status");
if(($product->name)=="")
{
$errors['err_name'] = "Name is required";
}
if(($product->short_description)=="")
{
$errors['err_short_description'] = "Description is required";
}//edit on
if($product->id_category <= 0)
{
$errors['err_id_category'] ="Parent Category is required";
}
if($product->code == '')
{
$errors['err_code'] ="Product Code is required";
}
if(sizeof($errors) == 0)
{
if($id_product) {
$product->date_upd = date('Y-m-d H:i:s');
if(isset($_FILES) AND sizeof($_FILES) AND $_FILES['image']['name'] != NULL && $id_product) {
$postimage = $product->postImage($id_product);
}
if($product->update())
{
$redirect = array("template"=>ADMIN_URI."product");
$session->set("success","Product Updated Successfully");
Tools::redirectTo($link->rewrite_link($redirect));
}
else {
$errors['fail'] ="Please Try again Later";
}
}
else {
$product->date_add = date('Y-m-d H:i:s');
$product->date_upd = date('Y-m-d H:i:s');
$id_product = $product->add(DB::RETURN_INSERT_ID);
if(isset($_FILES) AND sizeof($_FILES) AND $_FILES['image']['name'] != NULL && $id_product) {
$product->postImage($id_product);
}
if($id_product){
$redirect = array("template"=>ADMIN_URI."product");
$session->set("success","Product Added Successfully");
Tools::redirectTo($link->rewrite_link($redirect));
}
else {
$errors['fail'] ="Please Try again Later";
}
}
}
}
if(Tools::getVar('action') == 'delete' && Tools::getVar('id_product') )
{
$id_product = Tools::getVar('id_product');
$product = new Product($id_product);
if($product->delete()) {
$session->set("success","Product Deleted successfully");
Tools::redirectTo($link->rewrite_link(array("template"=>ADMIN_URI."product")));
}
else {
$errors['fail'] ="Please Try again Later";
}
}
if(Tools::getVar('action') == "status_change" && Tools::getVar('id_product'))
{
$id_product = Tools::getVar('id_product');
$product = new Product($id_product);
$product->status =Tools::getVar("status");
$product->update();
$session->set("success","Status updated successfully");
Tools::redirectTo($link->rewrite_link(array("template"=>ADMIN_URI."product")));
}
require_once("header.php");
?>
我的图片上传课程，
<?php
class Product extends ObjectModel
{
protected function uploadImage($id, $name, $dir, $ext = false)
{
if (isset($_FILES[$name]['tmp_name']) AND !empty($_FILES[$name]['tmp_name']))
{
// Delete old image
if (file_exists($dir.$id.'.'.$this->imageType)) {
$imagesTypes = $this->productImageTypes;
foreach ($imagesTypes AS $k => $imageType)
{
if (file_exists($dir.$id.'-'.stripslashes($imageType['name']).'.jpg'))
{
unlink($dir.$id.'-'.stripslashes($imageType['name']).'.jpg');
}
}
unlink($dir.$id.'.'.$this->imageType);
}
// Check image validity
if ($error = checkImage($_FILES[$name], $this->maxImageSize))
$_errors[] = $error;
elseif (!$tmpName = tempnam(TEMP_DIR, 'SST') OR !move_uploaded_file($_FILES[$name]['tmp_name'], $tmpName))
return false;
else
{
$_FILES[$name]['tmp_name'] = $tmpName;
// Copy new image
if (!imageResize($tmpName, $dir.$id.'.'.$this->imageType, NULL, NULL, ($ext ? $ext : $this->imageType)))
$_errors[] = Tools::displayError('An error occurred while uploading image.');
else {
$imagesTypes = $this->productImageTypes;
foreach ($imagesTypes AS $k => $imageType)
imageResize($dir.$id.'.jpg', $dir.$id.'-'.stripslashes($imageType['name']).'.jpg', (int)($imageType['width']), (int)($imageType['height']));
}
if (sizeof($_errors))
return false;
else
{
unlink($tmpName);
return true;
}
return false;
}
}
return true;
}
}
答案 0 :(得分：2)
假设您的浏览器正在显示图像的缓存版本，因为您将新数据保存为相同的文件名，请尝试在生成HTML以显示它时将包含随机字符串或时间戳的查询字符串附加到图像URL。像这样：
PHP
$image_tag='<img src="image-file.jpg?t='.timestamp().'" />';
这应该使浏览器获取图像的新版本，而不是使用它的缓存版本。