I have written a plugin which can store a table of technical specifications for each post (product) in an own database table.
For the search function of the site I want to add a custom parameter to the array passed to
I have no clue where to register this custom parameter so that it is handled by the plugin as soon as
WP_Query() executes the search.
Is there a hook that I can use in the plugin to restrict the posts found by
WP_Query() to a certain set matching the specs given?
Or do I eventually have to build the entire query using SQL?
See the following example: next to "standard"-parameters I have a custom parameter
_spec its value I want to be parsed in some way by the plugin.
<?php new WP_Query( array( 's' => 'some keyword', //keyword criterion 'category' => 'some category', //taxonomy criterion '_spec' => 'year_min=1980;year_max=2010', //custom criterion to be handled by the plugin ) ); ?>