I'm using WAMP and using something similar to the following code:

$pager_layout = new Pager(

new Doctrine_Pager(

Doctrine_Query::create()

->from($this->table) ->orderBy("$sortkey $sortorder"),

$currentPage, $resultsPerPage

), new Doctrine_Pager_Range_Sliding(array(

'chunk' => 5

)), 'url'

);

I had an error where I put $table instead of $this->table for from() and it caused Apache to crash. I'd recommend possibly something to catch if the argument is null/blank and throw an exception.. it's hard to test when Apache continually fails :)