Automatically update your php_browscap.ini

19 10 2010

My website uses the PHP function get_browser to see if a client is Javascript enabled. (I use this primarily to see if the visitor is a search engine bot and should see a long list of data or a real person and can handle AJAX-loaded data in tabs – most real people these days are using Javascript-enabled browsers.)

get_browser relies on the php_browscap.ini file, and the problem is that keeping the php_browscap.ini file up-to-date can be a chore, and should certainly be done automatically. (I notice the problem now that I use Chrome, and with every major release, the browscap file has no clue about my new browser, which is silly.)

So I finally sat down and wrote a basic script to fetch the updated file and restart my web server, which I’ll run weekly. This works for my FreeBSD box – change the paths and download command to fit your installation.

/usr/local/bin/wget -Ophp_browscap.ini "http://browsers.garykeith.com/stream.asp?PHP_BrowsCapINI"
mv -f /usr/local/etc/php/php_browscap.ini /usr/local/etc/php/php_browscap.old.ini
mv -f php_browscap.ini /usr/local/etc/php/
/usr/local/etc/rc.d/apache22 restart

I saved to: usr/local/www/mysite.com/get_php_browscap.sh
Then add it to your crontab:

# php_browscap update
5       4       *       *       6       root    /usr/local/www/mysite.com/get_php_browscap.sh >> /var/log/cron.log

I run it Saturday morning.
Any questions?

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How to Embed AJAX(!) Forms in Symfony 1.2 Admin Generator

4 05 2009

Based on a few informative articles, helping a veteran Symfony 1.0 programmer navigate through the 1.2 form structure, I was able to embed forms in an admin generated form based on a one-to-many relationship. See those articles at:

How to Embed Forms in Symfony 1.2 Admin Generator
Interactive embedded forms

For the sake of speed, though, I wanted to be able to add more embedded forms dynamically via AJAX before submitting the whole form. Here’s how I did it:

Adding the initial forms; on edit, load the related objects with a delete button; on new object or edit, add 3 blank embedded forms to start with.

// lib/forms/PoForm.class.php
public function configure() {
  sfLoader::loadHelpers(array('jQuery','Asset','Tag','Url'));
   $index = 0;
   foreach ($this->getObject()->getItemPos() as $book){
    $this->embedForm('item_pos'.++$index, new ItemPoForm($book));
    $label = "Item $index".jq_link_to_remote(image_tag('/sf/sf_admin/images/delete'), array(
      'url'     =>  'po/deleteItem?idd='.$book->getId(),
      'success' =>  "jQuery('.sf_admin_form_field_item_pos$index').remove();",
      'confirm' => 'Sure???',
    ));
    $this->widgetSchema->setLabel('item_pos'.$index,$label);
  }
  $a=sfContext::getInstance()->getUser()->getAttribute('N1added'.$this->getObject()->getId());
  $more = $this->getObject()->isNew()?max(3,$a-$index):($a>($index+3)?$a-$index:3);
  for($i=0;$i<$more;$i++){
    $ip = new ItemPo();
    $ip->setPo($this->getObject());
    $this->embedForm('item_pos'.++$index, new ItemPoForm($ip));
    $this->widgetSchema->setLabel('item_pos'.$index,"Item $index");
  }

  $label = "Item $index".jq_link_to_remote(image_tag('/sf/sf_admin/images/add'), array(
    'url'     =>  'po/addItems?po='.$this->getObject()->getId().'&index='.$index,
    'update'  =>  'sf_fieldset_none',
    'position'=>  'bottom',
  ));
  $this->widgetSchema->setLabel('item_pos'.$index,$label);

  sfContext::getInstance()->getUser()->setAttribute('N1added'.$this->getObject()->getId(), $index);
}

The last item on our list gets an “add” image, which makes an AJAX call to add new blank forms.
You can see we also use a user attribute to store how many embedded forms are being displayed, so we know what index we’re up to when we add more forms, and we know how many forms to regenerate on error.

Let’s create the add and delete actions-

// apps/frontend/modules/po/actions/actions.class.php
public function executeDeleteItem(sfWebRequest $request) {
   $sub_category = ItemPoPeer::retrieveByPK($request->getParameter('idd'));
  if (!$sub_category) {return $this->renderText('Error '.$request->getParameter('idd'));}
  $sub_category->delete();
  if (!$this->getRequest()->isXmlHttpRequest()){
    $this->redirect('@po_edit?id='.$sub_category->getPo()->getId());
  }
  return $this->renderText('');
 }
 public function executeAddItems(sfWebRequest $request){
  $po = $request->getParameter('po');
  $index = sfContext::getInstance()->getUser()->getAttribute('N1added'.$po);
  sfLoader::loadHelpers(array('jQuery','Asset','Tag','Url'));
  $form = new PoForm();
  $form->setWidgets(array('id' => new sfWidgetFormInputHidden(),));
  $form->setValidators(array('id' => new sfValidatorPropelChoice(array('model' => 'Po', 'column' => 'id', 'required' => false)),));
  $widgetSchema = $form->getWidgetSchema();
  $widgetSchema->setNameFormat('po[%s]');

  for($i=0;$i<3;$i++){
    $ip = new ItemPo();
    if($po) $ip->setPoId($po);
    $form->embedForm('item_pos'.++$index, new ItemPoForm($ip));
    $widgetSchema->setLabel('item_pos'.$index,"Item $index");
  }

  $label = "Item $index".jq_link_to_remote(image_tag('/sf/sf_admin/images/add'), array(
    'url'     =>  'po/addItems?po='.$po.'&index='.$index,
    'update'  =>  'sf_fieldset_none',
    'position'=>  'bottom',
  ));
  $widgetSchema->setLabel('item_pos'.$index,$label);

  sfContext::getInstance()->getUser()->setAttribute('N1added'.$po, $index);
  $this->form = $form;
  return $this->renderPartial('po/items');
 }

The po/items partial is just a snippet from the auto-generated _form.php-

<?php foreach($configuration->getFormFields($form, 'new') as $fields): ?>
 <?php foreach ($fields as $name => $field): ?>
 <?php if ((isset($form[$name]) && $form[$name]->isHidden()) || (!isset($form[$name]) && $field->isReal())) continue ?>
 <?php include_partial('po/form_field', array(
  'name'       => $name,
  'attributes' => $field->getConfig('attributes', array()),
  'label'      => $field->getConfig('label'),
  'help'       => $field->getConfig('help'),
  'form'       => $form,
  'field'      => $field,
  'class'      => 'sf_admin_form_row sf_admin_'.strtolower($field->getType()).' sf_admin_form_field_'.$name,
 )) ?>
 <?php endforeach; ?>
<?php endforeach; ?>

Finally, we modify our form’s bind method to remove unused embedded forms, and link the rest to our main object-

// lib/forms/PoForm.class.php
  public function bind(array $taintedValues = null, array $taintedFiles = null)
  {
    for($i=1;$i<=sfContext::getInstance()->getUser()->getAttribute('N1added'.$this->getObject()->getId(),3);$i++)
    {
      if(!isset($taintedValues["item_pos$i"]) || empty($taintedValues["item_pos$i"]['item_id']))
      {
        $this->embeddedForms['item_pos'.$i]->getObject()->setDeleted(true);
        unset($this->embeddedForms["item_pos$i"],$this->validatorSchema["item_pos$i"]);
        unset($taintedValues['item_pos'.$i]);
      } else {
        $this->embeddedForms['item_pos'.$i]->getObject()->setPo($this->getObject());
      }

    }
    return parent::bind($taintedValues,$taintedFiles);
  }

That should do it!
(In case you’re having trouble seeing the code, you can go here to see it all)

symfony embedded forms ajax

symfony embedded forms ajax

edit form example

edit form example