First of all, we need to create an HTML page using the <form> form
<body> <form action="tu5.php" method="post" enctype="multipart/form-data"> 上传文件:<br><br> <input type="hidden" name="MAX_FILE_SIZE" value="1000000"> 第一张图:<input type="file" name='myfile[]'><br><br> 第二张图:<input type="file" name='myfile[]'><br><br> <input style="margin-left: 8%;" type="submit" value="上传"> </form> </body>
Here we demonstrate uploading 2 images at a time.
You can select two pictures by clicking the two "Select File" buttons, and then click "Upload" to upload the two pictures at once.
Show the complete PHP backend function code:
<?php echo "<pre>"; echo "<hr/>"; //1.获取上传文件信息 $upfile = $_FILES["myfile"]; $typelist = array("image/jpeg","image/jpg","image/png","image/gif"); //定义允许的类型 $path="uploads/"; //定义一个上传过后的目录 //重新组装上传文件的数据,以便依次上传 $uploadFiles = array(); foreach($upfile as $key =>$value) { foreach($value as $k => $v){ $uploadFiles[$k][$key]=$v; } } //遍历上传 foreach($uploadFiles as $k => $v) { //2. 过滤上传文件的错误号 if ($v['error'] > 0) { //获取错误信息 switch ($v['error']) { case 1: $info = "上传的文件超过了 php.ini 中 upload_max_filesize 选项限制的值。"; break; case 2: $info = "上传文件的大小超过了 HTML 表单中 MAX_FILE_SIZE 选项指定的值。"; break; case 3: $info = "文件只有部分被上传。"; break; case 4: $info = "没有文件被上传。 "; case 6: $info = "找不到临时文件夹。"; break; case 7: $info = "文件写入失败"; break; } die("上传文件{$k}错误,原因:" . $info); } //3. 本次上传文件到小的过滤(自己选择) if ($v['size'] > 100000) { die('上传文件{$k}大小超出限制!'); } //4. 类型过滤 if (!in_array($v["type"], $typelist)) { die("上传文件{$k}类型非法!" . $v["type"]); } //5. 上传后的文件名定义(随机获取一个文件名(保持后缀名不变)) $fileinfo = pathinfo($v["name"]);//解析上传文件名字 do{ $newfile = date("Y-m-d,H-i-s") . rand(1000, 9999) . "." . $fileinfo["extension"]; } while (file_exists($path . $newfile)); //6. 执行文件上传 //判断是否是一个上传的文件 if (is_uploaded_file($v["tmp_name"])) { //执行文件上传(移动上传文件) if (move_uploaded_file($v["tmp_name"], $path . $newfile)) { //echo "文件{$K}上传成功!"; //执行写入数据库操作 $link = mysqli_connect('localhost','root','root') or die("数据库连接失败!"); $db = mysqli_select_db($link,'test'); mysqli_set_charset($link,'utf8'); $filepath = $path.$newfile; $name = $v['name']; $size = $v['size']; $sql = "insert into img(id,name,size,pic) value(null,'$name','$size','$filepath')"; mysqli_query($link,$sql); mysqli_close($link); } else { die("上传文件{$k}失败"); } } else { die("不是一个上传文件!"); } } ?>