如何在上传时一次重命名多张图片


How to rename multiple image at once while uploading

我首先描述这段代码,它的作用

/**
* Stores any image uploaded from the edit form
*
* @param assoc The 'image' element from the $_FILES array containing the file upload data
*/ 
public function storeUploadedImage( $image ) {
if ( $image['error'] == UPLOAD_ERR_OK )
{
  // Does the Article object have an ID?
  if ( is_null( $this->id ) ) trigger_error( "Article::storeUploadedImage(): Attempt to upload an image for an Article object that does not have its ID property set.", E_USER_ERROR );
  // Delete any previous image(s) for this article
  $this->deleteImages();
  // Get and store the image filename extension
  $this->imageExtension = strtolower( strrchr( $image['name'], '.' ) );
  // Store the image
  $tempFilename = trim( $image['tmp_name'] );
  if ( is_uploaded_file ( $tempFilename ) ) {
    if ( !( move_uploaded_file( $tempFilename, $this->getImagePath() ) ) ) trigger_error( "Article::storeUploadedImage(): Couldn't move uploaded file.", E_USER_ERROR );
    if ( !( chmod( $this->getImagePath(), 0666 ) ) ) trigger_error( "Article::storeUploadedImage(): Couldn't set permissions on uploaded file.", E_USER_ERROR );
  }
  // Get the image size and type
  $attrs = getimagesize ( $this->getImagePath() );
  $imageWidth = $attrs[0];
  $imageHeight = $attrs[1];
  $imageType = $attrs[2];
  // Load the image into memory
  switch ( $imageType ) {
    case IMAGETYPE_GIF:
      $imageResource = imagecreatefromgif ( $this->getImagePath() );
      break;
    case IMAGETYPE_JPEG:
      $imageResource = imagecreatefromjpeg ( $this->getImagePath() );
      break;
    case IMAGETYPE_PNG:
      $imageResource = imagecreatefrompng ( $this->getImagePath() );
      break;
    default:
      trigger_error ( "Article::storeUploadedImage(): Unhandled or unknown image type ($imageType)", E_USER_ERROR );
  }
  // Copy and resize the image to create the thumbnail
  $thumbHeight = intval ( $imageHeight / $imageWidth * ARTICLE_THUMB_WIDTH );
  $thumbResource = imagecreatetruecolor ( ARTICLE_THUMB_WIDTH, $thumbHeight );
  imagecopyresampled( $thumbResource, $imageResource, 0, 0, 0, 0, ARTICLE_THUMB_WIDTH, $thumbHeight, $imageWidth, $imageHeight );
  // Save the thumbnail
  switch ( $imageType ) {
    case IMAGETYPE_GIF:
      imagegif ( $thumbResource, $this->getImagePath( IMG_TYPE_THUMB ) );
      break;
    case IMAGETYPE_JPEG:
      imagejpeg ( $thumbResource, $this->getImagePath( IMG_TYPE_THUMB ), JPEG_QUALITY );
      break;
    case IMAGETYPE_PNG:
      imagepng ( $thumbResource, $this->getImagePath( IMG_TYPE_THUMB ) );
      break;
    default:
      trigger_error ( "Article::storeUploadedImage(): Unhandled or unknown image type ($imageType)", E_USER_ERROR );
  }
  $this->update();
}
}

/**
* Deletes any images and/or thumbnails associated with the article
*/
public function deleteImages() {
// Delete all fullsize images for this article
foreach (glob( ARTICLE_IMAGE_PATH . "/" . IMG_TYPE_FULLSIZE . "/" . $this->id . ".*") as $filename) {
  if ( !unlink( $filename ) ) trigger_error( "Article::deleteImages(): Couldn't delete image file.", E_USER_ERROR );
}
// Delete all thumbnail images for this article
foreach (glob( ARTICLE_IMAGE_PATH . "/" . IMG_TYPE_THUMB . "/" . $this->id . ".*") as $filename) {
  if ( !unlink( $filename ) ) trigger_error( "Article::deleteImages(): Couldn't delete thumbnail file.", E_USER_ERROR );
}
// Remove the image filename extension from the object
$this->imageExtension = "";
}

/**
* Returns the relative path to the article's full-size or thumbnail image
*
* @param string The type of image path to retrieve (IMG_TYPE_FULLSIZE or IMG_TYPE_THUMB). Defaults to IMG_TYPE_FULLSIZE.
* @return string|false The image's path, or false if an image hasn't been uploaded
*/
public function getImagePath( $type=IMG_TYPE_FULLSIZE ) {
return ( $this->id && $this->imageExtension ) ? ( ARTICLE_IMAGE_PATH . "/$type/" . $this->id . $this->imageExtension ) : false;
}  
  1. 它为每篇文章上传一张图片和一个缩略图
  2. 重命名图像(例如,如果数据库文章 ID 为 5,则重命名后的完整大小和缩略图将为 5)

我想修改一个CMS,它只允许每篇文章上传一张图片。所以我所有的意图是每篇文章上传 5 张图片。

我的第二个意图是根据文章标题重命名每个文件(例如,如果文章标题是诺基亚N9,则上传时的第一张图片将被nokia_n9_1.jpg,第二张将被nokia_n9_2.jpg,左边也是第一张和第一张

我是PHP OOP的新手。我知道要做的工作相当多。帮助将不胜感激。如果您想查看完整的CMS源代码,请查看链接

http://www.elated.com/articles/cms-in-an-afternoon-php-mysql/

http://www.elated.com/articles/add-image-uploading-to-your-cms/

实际上,

进行此更改与OOP无关):

所以在管理中.php你有这个:

// User has posted the article edit form: save the new article
 $article = new Article;
 $article->storeFormValues( $_POST );
 $article->insert();
 if ( isset( $_FILES['image'] ) ) $article->storeUploadedImage( $_FILES['image'] );
 header( "Location: admin.php?status=changesSaved" );

请考虑阅读此 http://www.php.net/manual/en/features.file-upload.post-method.php 以了解我们将进行的更改。因此,请将管理员 php 修改为:

// User has posted the article edit form: save the new article
  $article = new Article;
  $article->storeFormValues( $_POST );
  $article->insert();
  if ( isset( $_FILES['image'] ) ) $article->storeUploadedImage( $_FILES['image'], '1' );
  if ( isset( $_FILES['image2'] ) ) $article->storeUploadedImage( $_FILES['image2'], '2' );
  if ( isset( $_FILES['image3'] ) ) $article->storeUploadedImage( $_FILES['image3'], '3' );
  if ( isset( $_FILES['image4'] ) ) $article->storeUploadedImage( $_FILES['image4'], '4' );
  if ( isset( $_FILES['image5'] ) ) $article->storeUploadedImage( $_FILES['image5'], '5' );
  header( "Location: admin.php?status=changesSaved" );

修改文章.php:

找到这个

public function storeUploadedImage( $image ) {

更改为此内容:

public function storeUploadedImage( $image, $postfix ) {

还可以找到这个:

  if ( is_uploaded_file ( $tempFilename ) ) {
     if ( !( move_uploaded_file( $tempFilename, $this->getImagePath() ) ) ) trigger_error( "Article::storeUploadedImage(): Couldn't move uploaded file.", E_USER_ERROR );
     if ( !( chmod( $this->getImagePath(), 0666 ) ) ) trigger_error( "Article::storeUploadedImage(): Couldn't set permissions on uploaded file.", E_USER_ERROR );
  }

并更改为:

  $image_name = implode( '_', explode( ' ', $this->title ) ) . '_' . $postfix; 
  if ( is_uploaded_file ( $tempFilename ) ) {
     if ( !( move_uploaded_file( $tempFilename, $this->getImagePath( IMG_TYPE_FULLSIZE, $image_name ) ) ) ) trigger_error( "Article::storeUploadedImage(): Couldn't move uploaded file.", E_USER_ERROR );
     if ( !( chmod( $this->getImagePath(IMG_TYPE_FULLSIZE, $image_name), 0666 ) ) ) trigger_error( "Article::storeUploadedImage(): Couldn't set permissions on uploaded file.", E_USER_ERROR );
  }

最后将getImagePath方法(函数)替换为:

public function getImagePath( $type=IMG_TYPE_FULLSIZE, $title = null ) {
    if( $title !== null )
    {
        return ( $this->imageExtension ) ? ( ARTICLE_IMAGE_PATH . "/$type/" . $title . $this->imageExtension ) : false;
    }
    else
    { 
        return ( $this->id && $this->imageExtension ) ? ( ARTICLE_IMAGE_PATH . "/$type/" . $this->id . $this->imageExtension ) : false;
    }
} 

您还必须修改用于上传图像的表单:

      <li>
        <label for="image">New Image</label>
        <input type="file" name="image" id="image" placeholder="Choose an image to upload" maxlength="255" />
        <label for="image2">New Image2</label>
        <input type="file" name="image2" id="image2" placeholder="Choose an image to upload" maxlength="255" />
        ...
      </li>