Very nasty problem, I made a very long investigation to find out what was the origin of the bug. I made an original post for this, but I deleted it to create a new fresh post. So let's start by the start. Thank you in advance for reading this until the end.
I have a View Helper Pub.php. This one display randomly an ad. $this->pub() is called in the layout.phtml and in the phtml view files. The Helper also increments the number of impression before displaying it.
Pub.php
Class My_View_Helper_Pub extends Zend_View_Helper_Abstract {
public function pub( $place, $format ) {
// Extract the active campaigns, then randomly select one
$campaigns = $model->getActiveCampaigns();
...
// Increase the number of view for this campaign (in MySQL)
$model->increasePrint($campaign->id);
// And display the banner
echo $this->generateHtml($campaign->filename);
}
public function generateHtml($filename){
// Generate the html according to the filename (image, flash, custom tag etc...)
return $code;
}
IncreasePrint()
public function increasePrint($id){
$table = $this->getTable();
$row = $table->find($id)->current();
$row->imp_made = $row->imp_made + 1;
return $row->save();
}
My layout.phtml is also simple :
<html>
<head>
<?= $this->pub(null, 'css') ?>
</head>
<body>
<?= $this->pub(null, 'big_banner' ?>
</body>
Problem : On some actions, ads in the layout are selectionned and incremented twice ! As if the helper was instancied again.
After some search, the problem seems to come from another View Helper : LogoEvent. This helper displays a logo/image by returning proper HTML code.
LogoEvent.php
class My_View_Helper_LogoEvent extends Zend_View_Helper_Abstract
{
public function logoEvent($image, $taille = null){
$image = trim($image);
if ($taille){
$width = "max-width: {$taille}px;";
} else {
$width = '';
}
if (!empty($image)){
return '<img src="/images/agenda/logos/'. $image .'" style="'. $width .'" alt="Logo" />';
} else {
return '<img src="/images/agenda/logos/no-logo.png" style="'. $width .'" alt="No Logo" />';
}
}
}
The double-incrementation happens when the file doesn't exist on my hard disk. Really weird... I tried this :
echo $this->logoEvent( 'existing_image.jpg', '100');
// No problem, everything works fine.
echo $this->logoEvent( 'unexisting_image.jpg', '100');
// => problem.
But
echo htmlentities($this->logoEvent( 'unexisting_image.jpg', '100'));
// No problem, everything works fine.
Someone has better knowledge than me to find out what could be the problem or a way to find it... Thank you !
