在您的表单中，添加多个文件输入.一种方法是使用数组名称-image[]

In your form, add multiple file inputs. One way is to use an array name - image[]

Image to upload: <input type="file" name="image[]" /><br />
Image to upload: <input type="file" name="image[]" /><br />
Image to upload: <input type="file" name="image[]" /><br />
....  // as many as you want. Just be aware of upload_max_filesize, memory_limit, post_max_size etc.
<br /> 

然后在您的uploader.php中，使用for循环包装文件上传代码

Then in your uploader.php, wrap your file upload code with a for loop

for($i=0;$i<count($_FILES["image"]["name"]);$i++){

    $fileData = pathinfo(basename($_FILES["image"]["name"][$i]));

     ...

    if (move_uploaded_file($_FILES["image"]["tmp_name"][$i], $target_path))
    {
      ...

      echo "The image {$_FILES['image']['name'][$i]} was successfully uploaded and added to the gallery<br />";

    }
    else
    {
     echo "There was an error uploading the file {$_FILES['image']['name'][$i]}, please try again!<br />";
    }
} // close your foreach

该手册主要介绍了上传文件(尤其是多个文件)时的常见陷阱. http://www.php.net/manual/en /features.file-upload.common-pitfalls.php

the manual has a great section on common pitfalls when uploading files, especially multiple. http://www.php.net/manual/en/features.file-upload.common-pitfalls.php

如果您要执行多个其他操作，则可以用相同的方式完成(我缩写了selects以减少复制/粘贴)-

If you want to do multiple of the others, it can be done the same way (I abbreviated the selects to reduce copy/paste) -

<form enctype="multipart/form-data" action="uploader.php" method="POST">

    // 1st set
    Category: <select class="text" name="dataType[]" />
    ...
    </select><br />
    <br />        

    Caption: <input type="text" name="title[]" /><br />
    <br />

    Image to upload: <input type="file" name="image[]" /><br />
    <br /> 

    // 2nd set
    Category: <select class="text" name="dataType[]" />
    ...
    </select><br />
    <br />        

    Caption: <input type="text" name="title[]" /><br />
    <br />

    Image to upload: <input type="file" name="image[]" /><br />
    <br />  

   // and so on, as many as you want  
   ...
    <input type="submit" value="Upload">
</form>

和您的php，将for循环放在所有元素周围

and your php, put the for loop around all the elements

for($i=0;$i<count($_FILES["image"]["name"]);$i++){

    $dataType = mysql_real_escape_string($_POST["dataType"][$i]);  // get the dataType with the same key - $i
    $title = mysql_real_escape_string($_POST["title"][$i]);   // get the title with the same key - $i

    $fileData = pathinfo(basename($_FILES["image"]["name"][$i]));

     ...

    if (move_uploaded_file($_FILES["image"]["tmp_name"][$i], $target_path))
    {
      ...

      echo "The image {$_FILES['image']['name'][$i]} was successfully uploaded and added to the gallery<br />";

    }
    else
    {
     echo "There was an error uploading the file {$_FILES['image']['name'][$i]}, please try again!<br />";
    }
} // close your foreach

修改
你快到了.删除for循环上方的重复代码.删除basename()，因为这会导致extension失败，并且pathinfo()将返回['basename'].

edit
you are almost there. Remove the duplicate code above the for loop. Remove basename(), as this is causing your extension to fail, and pathinfo() will return the ['basename'].

<?php
include($_SERVER['DOCUMENT_ROOT'] . "/connections/dbconnect.php");

for($i=0;$i<count($_FILES["image"]["name"]);$i++){
  if($_FILES["image"]["name"][$i] != ''){ // don't insert if file name empty
    $dataType = mysql_real_escape_string($_POST["dataType"][$i]);
    $title = mysql_real_escape_string($_POST["title"][$i]);

    $fileData = pathinfo($_FILES["image"]["name"][$i]);

    $fileName = uniqid() . '.' . $fileData['extension'];
    $target_path = $_SERVER['DOCUMENT_ROOT'] . "/images/gallery/" . $fileName;

    while(file_exists($target_path)){
       $fileName = uniqid() . '.' . $fileData['extension'];
       $target_path = $_SERVER['DOCUMENT_ROOT'] . "/images/gallery/" . $fileName;
    }     

  if (move_uploaded_file($_FILES["image"]["tmp_name"][$i], $target_path)){    // The file is in the images/gallery folder. 
    // Insert record into database by executing the following query:
     $sql="INSERT INTO images (data_type, title, file_name) "."VALUES('$dataType','$title','$fileName')";
     $retval = mysql_query($sql);

    echo "The image {$_FILES['image']['name'][$i]} was successfully uploaded and added to the gallery<br />
     <a href='index.php'>Add another image</a><br />";
  }
  else
  {
   echo "There was an error uploading the file {$_FILES['image']['name'][$i]}, please try again!<br />";
    }
  }
} // close your foreach
?>