我正在使用以下代碼上傳文件，一切正常，我只想上傳新名稱的文件，該名稱應(yīng)該是當(dāng)前上傳時(shí)間，實(shí)際上我想上傳名稱為上傳時(shí)間的文件<?php$statusMsg = '';// File upload path$targetDir = "../uploads/";$fileName = basename($_FILES["file"]["name"]);$targetFilePath = $targetDir . $fileName;$fileType = pathinfo($targetFilePath,PATHINFO_EXTENSION);if(isset($_POST["submit"]) && !empty($_FILES["file"]["name"])){    // Allow certain file formats    $book_title=$_POST['book_title'];    $allowTypes = array('jpg','png','jpeg');    if(in_array($fileType, $allowTypes)){        // Upload file to server        if(move_uploaded_file($_FILES["file"]["tmp_name"], $targetFilePath)){            // Insert image file name into database            $insert = mysqli_query($con,"INSERT into books (book_title,book_author,book_image,book_url) VALUES ('','','".$fileName."', '.')");            if($insert){                $statusMsg = "The file ".$fileName. " has been uploaded successfully.";            }else{                $statusMsg = "File upload failed, please try again.";            }         }else{            $statusMsg = "Sorry, there was an error uploading your file.";        }    }else{        $statusMsg = 'Sorry, only JPG, JPEG, PNG, GIF, & PDF files are allowed to upload.';    }}else{    $statusMsg = 'Please select a file to upload.';}// Display status messageecho $statusMsg;?>