Symfony, Images And Uploading

Define the photo field in config/schema.yml:

photo: varchar(255)

In apps/my_app/modules/my_mod/config/generator.yml:

    edit:
      fields:
        photo:
          name:       Photo
          help:       Please upload the photo
          type:       admin_input_file_tag
          upload_dir: photos
          params:     include_link=photos include_text="show photo" include_remove=true

That's it. Reload, your admin generator can now allow image uploading.

Automatically add thumbnails to uploaded photos. It will boost photo previews speed to be 10 times faster, and will ease on network bandwidth and server load as well.

Create file lib/imgHandling.class.php & lib/model/MyObj.php as follows:

<?php

class imgHandling
{
    public static function genThumbnail($mx, $my, $upload_dir, $fileName, $fileNameNew="")
    {
        if (!$fileNameNew) $fileNameNew = $fileName;
        $thumbnail = new sfThumbnail($mx, $my);
        $thumbnail->loadFile($upload_dir. $fileName);
        $thumbnail->save(sfConfig::get('sf_upload_dir').'/thumbnails/'.$fileNameNew, 'image/png');
    }
}

<?php

/**
 * Subclass for representing a row from the table.
 *
 * @package lib.model
 */
class MyObj extends BaseMyObj
{
    // == Extend the model for business logic

    public function save($con = null)
    {
        // == pre save hook
        // fill prereq fields

        // == call the parent save() method
        parent::save($con);

        // == post save hook
        // fill extra fields
        $fileName = $this->getPhoto();
        imgHandling::genThumbnail(100, 100,
                                  sfConfig::get('sf_upload_dir').'/photos/',
                                  $fileName);
    }
}

Of course, the save() code has been simplified for illustration purpose. If you want to keep your original upload filename for the thumbnail, follow the next article.

Install the plugin using the symfony command line:

$ symfony plugin-install http://plugins.symfony-project.org/sfThumbnailPlugin
$ symfony cc

Make sure the GD library is activated, you might have to uncomment the related line in your php.ini and restart your web server to enable PHP image handling functions. If unsure, check:

Create the uploads/thumbnails/ directory beforehand:

mkdir web/uploads/thumbnails

documented on: 2007.08.22