PHP上传多个文件只上传1个文件

Question

我多次编辑此代码(我是 php 新手)我的问题是使用此代码上传多个文件。我只能上传 1 个文件。

代码如下:

<?php
/**
 * uploadFile()
 * 
 * @param string $file_field name of file upload field in html form
 * @param bool $check_image check if uploaded file is a valid image
 * @param bool $random_name generate random filename for uploaded file
 * @return array
 */
function uploadFile ($file_field = null, $check_image = false, $random_name = false) {

  //Config Section    
  //Set file upload path
  $path = 'c:/xampp/htdocs/'; //with trailing slash
  //Set max file size in bytes
  $max_size = 1000000;
  //Set default file extension whitelist
  $whitelist_ext = array('jpg','png','gif');
  //Set default file type whitelist
  $whitelist_type = array('image/jpeg', 'image/png','image/gif');

  //The Validation
  // Create an array to hold any output
  $out = array('error'=>null);

  if (!$file_field) {
    $out['error'][] = "Please specify a valid form field name";           
  }

  if (!$path) {
    $out['error'][] = "Please specify a valid upload path";               
  }

  if (count($out['error'])>0) {
    return $out;
  }

  //Make sure that there is a file
  if((!empty($_FILES[$file_field])) && ($_FILES[$file_field]['error'] == 0)) {

    // Get filename
    $file_info = pathinfo($_FILES[$file_field]['name']);
    $name = $file_info['filename'];
    $ext = $file_info['extension'];

    //Check file has the right extension           
    if (!in_array($ext, $whitelist_ext)) {
      $out['error'][] = "Invalid file Extension";
    }

    //Check that the file is of the right type
    if (!in_array($_FILES[$file_field]["type"], $whitelist_type)) {
      $out['error'][] = "Invalid file Type";
    }

    //Check that the file is not too big
    if ($_FILES[$file_field]["size"] > $max_size) {
      $out['error'][] = "File is too big";
    }

    //If $check image is set as true
    if ($check_image) {
      if (!getimagesize($_FILES[$file_field]['tmp_name'])) {
        $out['error'][] = "Uploaded file is not a valid image";
      }
    }

    //Create full filename including path
    if ($random_name) {
      // Generate random filename
      $tmp = str_replace(array('.',' '), array('',''), microtime());

      if (!$tmp || $tmp == '') {
        $out['error'][] = "File must have a name";
      }     
      $newname = $tmp.'.'.$ext;                                
    } else {
        $newname = $name.'.'.$ext;
    }

    //Check if file already exists on server
    if (file_exists($path.$newname)) {
      $out['error'][] = "A file with this name already exists";
    }

    if (count($out['error'])>0) {
      //The file has not correctly validated
      return $out;
    } 

    if (move_uploaded_file($_FILES[$file_field]['tmp_name'], $path.$newname)) {
      //Success
      $out['filepath'] = $path;
      $out['filename'] = $newname;
      return $out;
    } else {
      $out['error'][] = "Server Error!";
    }

  } else {
    $out['error'][] = "No file uploaded";
    return $out;
  }      
}
?>
<?php
if (isset($_POST['submit'])) {
  $file = uploadFile('file', true, true);
  if (is_array($file['error'])) {
    $message = '';
    foreach ($file['error'] as $msg) {
      $message .= '<p>'.$msg.'</p>';    
    }
  } else {
    $message = "File uploaded successfully";
  }
  echo $message;
}
?>
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" enctype="multipart/form-data">
<input name="file" type="file" size="20" multiple="multiple" />
<input name="submit" type="submit" value="Upload files" />
</form>

请帮助我理解...我知道我必须使用foreach

Answer 1

你应该像 file[] 这样的数组来使用文件字段

<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post" enctype="multipart/form-data">
    <input name="file[]" type="file" size="20" multiple="multiple" />
    <input name="submit" type="submit" value="Upload files" />
</form>

如上修改代码试试