douqiao2008 2019-07-23 16:07
浏览 45

如何添加文本字段以在上载时更改文件名

I am uploading images and cropping to a directory, how do I add a text field to change the file name when uploading?

I have tried to add name field to the form but are unable to get the form to post the newname when uploading.

<form action="" method="POST" enctype="multipart/form-data">
<input id="input-6" name="art[]" type="file" multiple class="file- 
loading">
<input type="text" name="newname"/> 
<input type="submit" name="sub">

 </form>
<?php 
if(isset($_POST['sub'])){ (my guess is that "sub" needs to change to 
"newname" but that does not seem to work)
  if(isset($_FILES['art'])){
    foreach ($_FILES["art"]["error"] as $key => $error) {
      if ($error == UPLOAD_ERR_OK) {
       $tmp_name = $_FILES["art"]["tmp_name"][$key];
        $name = $_FILES["art"]["name"][$key];
        $image = imagecreatefromstring(file_get_contents(($tmp_name)));
          $filename = 'newimage/'.$name.'';

}
  ?>

NO error messages just doesn't append the file name.

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3条回答 默认 最新

  • dongyan4424 2019-07-23 16:17
    关注

    You are missing a whole part of the actual upload (most basic example involves using move_uploaded_file). Currently, your script is just asking for data (binary file and newname) and parsing them, without doing anything. Once you got the data, you need to upload the data. at that step, you can edit the filename.

    for example (taken from https://www.tutorialspoint.com/php/php_file_uploading, modified to include a new name field):

    <?php
   if(isset($_FILES['image'])){
      $errors= array();
      $file_name = $_POST['newname'] || $_FILES['image']['name'];
      $file_size =$_FILES['image']['size'];
      $file_tmp =$_FILES['image']['tmp_name'];
      $file_type=$_FILES['image']['type'];
      $file_ext=strtolower(end(explode('.',$_FILES['image']['name'])));

      $extensions= array("jpeg","jpg","png");

      if(in_array($file_ext,$extensions)=== false){
         $errors[]="extension not allowed, please choose a JPEG or PNG file.";
      }

      if($file_size > 2097152){
         $errors[]='File size must be excately 2 MB';
      }

      if(empty($errors)==true){
         move_uploaded_file($file_tmp,"images/".$file_name);
         echo "Success";
      }else{
         print_r($errors);
      }
   }
?>
<html>
   <body>

      <form action="" method="POST" enctype="multipart/form-data">
         <input type="file" name="image" />
         <input type="text" name="newname" />
         <input type="submit"/>
      </form>

   </body>
</html>
?>
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