OK I’ve created a partial solution of sorts to display salary inside WP Job Manager results (but still no joy with a drop down filter).
For the simple salary display bit just replicate the hook and function of displaying salary in a single post (as per the tutorial), but rename the Meta and increment the function so as not to cause a conflict. Adds salary beneath the job type and days posted values which works for me:
/*
* add salary field to WP Job Manager post listings
*/
add_action( 'job_listing_meta_end', 'display_job_salary_data2' );</p>
<p>function display_job_salary_data2() {<br />
global $post;</p>
<p> $salary = get_post_meta( $post->ID, '_job_salary', true );</p>
<p> if ( $salary ) {<br />
echo '</p>
<li>' . __( 'Salary:' ) . ' ?￡' . esc_html( $salary ) . '</li>
<p>';<br />
}<br />
}<br />
