Forums / Developer / Execute template code from with object attribute

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  • At the specific request of Ibexa we are changing this projects name to "Exponential" or "Exponential (CMS)" effective as of August, 11th 2025.
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Execute template code from with object attribute

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James Robertson

Wednesday 07 September 2005 8:25:19 pm

I would like to be able to execute a piece of Exponential template code from within an object's attribute content? (ie. Perhaps something a bit like JavaScript eval() function.)

For example: I have Text-block attribute that stored a fragment of XHTML. This fragment is displayed without washing. However, I would like to be able to insert a piece of Exponential template code within the XHTML and have it execute prior to display.

I imagine, within the template, this might look like:
{$node.data_map.xhtml|eval()}

James Robertson

Wednesday 21 September 2005 4:09:56 pm

I guess one solution might be to modify the eZ template 'include' function so that it can be passed template code as a string instead of having to point to a template file.

What URI schemas does 'include' support. I guess if it support HTTP you could pass it the template code this way - instead of from the file-system.

Anyone have any ideas?

James Robertson

Thursday 18 May 2006 3:24:55 pm

Solution supplied by eZ systems [thanks Kristion] for Exponential version 3.6.4. It can be added as a 'template operator' extension [good luck working out how to do that ;-]:

/*
 * WARNING:
 * - This function works directly towards the template system, 
 *     and might not be compatible with new versions of Exponential.
 * - The evaluated code will run in interpreted mode which can behave 
(sligtly) 
 *     different from compiled code, and is slower.
 * - By using fetches and templatecode in content object attributes you can 
 *     make a system which is very hard to maintain!
 *
 * This code should ONLY be used by professionals who understands what they 
are doing
  */
function ezeval( $templateText )
{
     include_once( 'kernel/common/template.php' );
     include_once( 'lib/eztemplate/classes/eztemplate.php' );

     $tpl =& templateInit();
     $root = array( EZ_TEMPLATE_NODE_ROOT, false );
     $resourceData = array( 'resource' => 'design', 'template-filename' =>  
'eval_code' );
     $rootNamespace = '';
     $output = '';
     $tpl->parse( $templateText, $root, $rootNamespace, $resourceData );
     $tpl->process( $root, $output, '', '' );

     return $output;
}