How To Cache A Queried PHP GD Image?

[phpQuestioner]

How do you cache a PHP GD Image that you are sending a query string to; in order to display the orginal image?

 

Example:

 

<img src="MyGDPhoto.php?photo=mypic.jpg">

 

 

The image is not being cached; because it keeps on having to reload.

[phpQuestioner]

Does no one know how I would cache a queried php gd library image? Can some one tell me if it can even be done?

[keeB]

It's a good question.

 

You'd probably have to build your own caching class.

 

Something like the following

 

<?php
class Cache {
   private $time_limit = 10; //minutes
   function Cache($obj) {
      $this->save($obj, $time)
   }

   function get($obj) {
       //check to see if $obj is older than 10 mins
       //somehow do a check to see if it's state has changed in the database (keep a lastUpdated column?)
      // if it hasn't changed, return the image from a file instead of the database
          //display
       //if it has changed, return false (or something)
   }
}
?>

# example client code
header("Content-type: image/jpeg");
$i = new Image("my.image"); // reference, hasn't been loaded yet
c = new Cache($i)
if ($data = $c->get()) {
   print $data;
} else {
   $i->load();
   $i->toBrowser();
}

 

That's probably how I would do it.