Changing and adding new fields to admin & filter

@j_mo that page with the snippet can be used for dropdowns too. Set your new fields ‘type’ to select, and define an array of options:

'sample_field' => array(
					'label'       => 'Your Field',
					'type'        => 'select',
					'required'    => true,
					'options'     => array(
							'option-1' => 'Option 1',
							'option-2' => 'Option 2'
					),
				)

Correct thats the hard part.

To add your field you can either override the template, or hook in a custom function. I use a custom function in my tags plugin:

add_action( 'job_manager_job_filters_search_jobs_end', array( $this, 'show_tag_filter' ) );

show_tag_filter is my method I output the tags/fields.

Then to actually use your data to filter, you’ll need to hook in another function. Again with my tags plugin I use this hook:

add_filter( 'job_manager_get_listings', array( $this, 'apply_tag_filter' ) );

Getting your new fields data would be something like this:

$params = array();
		if ( isset( $_POST['form_data'] ) ) {

			parse_str( $_POST['form_data'], $params );

			if ( isset( $params['job_tag'] ) ) {

In the above, my new field for filtering was named ‘job_tag’. Once I’ve got that value, I can manipulate the query passed by the job_manager_get_listings filter.