Php 上传图像

我已经完成上传图像。代码工作得很完美。我想在将图像保存到数据库时插入会话id。如何在insert query.view文件中保存会话id以在库中显示图像。我想将它们显示为用户

这就是为什么我需要保存用户id以检索特定用户的特定图像。现在它正在从数据库中获取所有图像。我想存储用户id以跟踪特定图像。在这里，我开始了我的课程。这是我的会话id

   <?php
             session_start();   //what can be done to save this id.I need save this staffid to save in the database.What is the process

            if(!$this->session->userdata('staffid')){             redirect("login/checkLogin");
}
            ?>

   <?php  

好的，首先你需要理解会话

如果我理解正确：


您希望将当前用户的链接保存到图像（保存在会话中），然后
拉取用户在后期保存的图像

这是正确的吗

指出“staffid”是独一无二的：

在图像表上创建列：

更改表格
tbl_图像
ADD
staffid
INT NOT NULL

然后将insert语句更改为

$sql=“插入tbl_图像（图像名称，staffid）值（：img，：staffid）”

及

$stmt->bindValue（$img“，$filename）；
$stmt->bindValue（“：staffid”，$this->session->userdata（'staffid'）

然后，当选择仅需要传入当前用户id时，添加where子句并相应地准备查询。这将返回该用户保存的所有图像：

其中staffid=：staffid

您首先需要编写清晰易读的代码
   if (isset($_POST["sub1"]) || isset($_POST["sub2"])) {
          // include resized library
          require_once('./php-image-magician/php_image_magician.php'); //library for showing images in thumbnail.This library is helping for showing images as gallery. 
          $msg = "";
          $valid_image_check = array("image/gif", "image/jpeg", "image/jpg", "image/png", "image/bmp");
          if (count($_FILES["user_files"]) > 0) {
            $folderName = "uploads/";

            $sql = "INSERT INTO tbl_images(image_name) VALUES (:img)";  //have insert my session id here.What is the procedure to insert session id in sql insert query.
            $stmt = $DB->prepare($sql);

            for ($i = 0; $i < count($_FILES["user_files"]["name"]); $i++) { //Here is the loop for saving multiple images in database.

              if ($_FILES["user_files"]["name"][$i] <> "") {

                $image_mime = strtolower(image_type_to_mime_type(exif_imagetype($_FILES["user_files"]["tmp_name"][$i])));
                // if valid image type then upload
                if (in_array($image_mime, $valid_image_check)) {

                  $ext = explode("/", strtolower($image_mime));
                  $ext = strtolower(end($ext));
                  $filename = rand(10000, 990000) . '_' . time() . '.' . $ext;
                  $filepath = $folderName . $filename;
 //this will save the folder name and file path in database.There is no problem saving them.Working successfully.

                  if (!move_uploaded_file($_FILES["user_files"]["tmp_name"][$i], $filepath)) {
                    $emsg .= "Failed to upload <strong>" . $_FILES["user_files"]["name"][$i] . "</strong>. <br>";
                    $counter++;
                  } else {
                    $smsg .= "<strong>" . $_FILES["user_files"]["name"][$i] . "</strong> uploaded successfully. <br>";

                    $magicianObj = new imageLib($filepath);
                    $magicianObj->resizeImage(100, 100);
                    $magicianObj->saveImage($folderName . 'thumb/' . $filename, 100);

                    /*             * ****** insert into database starts ******** */
                    try {
                      $stmt->bindValue(":img", $filename); //i have to insert my session id in here.
                      $stmt->execute();
                      $result = $stmt->rowCount();
                      if ($result > 0) {
                        // file uplaoded successfully.
                      } else {
                        // failed to insert into database.
                      }
                    } catch (Exception $ex) {
                      $emsg .= "<strong>" . $ex->getMessage() . "</strong>. <br>";
                    }
                    /*             * ****** insert into database ends ******** */
                  }
                } else {
                  $emsg .= "<strong>" . $_FILES["user_files"]["name"][$i] . "</strong> not a valid image. <br>";  
//After checking file type if anything goes wrong it will show this message.File type is given.
                }
              }
            }


            $msg .= (strlen($smsg) > 0) ? successMessage($smsg) : "";
            $msg .= (strlen($emsg) > 0) ? errorMessage($emsg) : "";
          } else {
            $msg = errorMessage("You must upload atleast one file");//validation for uploading files.
          }
        }
        ?>