jobs-post-query.php

<?php
$args = array(
    'post_type'      => 'jobs',
    'posts_per_page' => 5,
    'post_status'    => 'publish',
);


$type       = get_query_var( 'type' );
$industry   = get_query_var( 'industry' );
$location   = get_query_var( 'location' );
$role       = get_query_var( 'role' );
$experience = get_query_var( 'experience' );
$ql         = get_query_var( 'ql' );

/* if ( !empty( $search_q ) && $post_type == 'jobs' ) {
    $args = array(
        's'         => $search_q,
        'post_type' => 'jobs',
    );
} */

if ( !empty( $type ) ) {
    if (!in_array('all', $type) ) {
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'job-type',
                'field'    => 'slug',
                'terms'    => $type,
            ),
        );
    } else {
        $term_id = [];
        $_terms  = get_terms( ['taxonomy' => 'job-type', 'hide_empty' => true] );
        foreach ( $_terms as $_term ) {
            $term_id[] = $_term->term_id;
        }

        $args['tax_query'] = array(
            array(
                'taxonomy' => 'job-type',
                'field'    => 'term_id',
                'terms'    => $term_id,
            ),
        );
    }
}

if ( !empty( $industry ) ) {
    if ( !in_array('all', $industry )) {
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'industry',
                'field'    => 'slug',
                'terms'    => $industry,
            ),
        );
    } else {
        $term_id = [];
        $_terms  = get_terms( ['taxonomy' => 'industry', 'hide_empty' => true] );
        foreach ( $_terms as $_term ) {
            $term_id[] = $_term->term_id;
        }
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'industry',
                'field'    => 'term_id',
                'terms'    => $term_id,
            ),
        );
    }
}

if ( !empty( $location ) ) {
    if ( !in_array('all', $location ) ) {
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'job-location',
                'field'    => 'slug',
                'terms'    => $location,
            ),
        );
    } else {
        $term_id = [];
        $_terms  = get_terms( ['taxonomy' => 'job-location', 'hide_empty' => true] );
        foreach ( $_terms as $_term ) {
            $term_id[] = $_term->term_id;
        }
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'job-location',
                'field'    => 'term_id',
                'terms'    => $term_id,
            ),
        );
    }
}

if ( !empty( $role ) ) {
    if (!in_array('all', $role ) ) {
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'job-speciality',
                'field'    => 'slug',
                'terms'    => $role,
            ),
        );
    } else {
        $term_id = [];
        $_terms  = get_terms( ['taxonomy' => 'job-speciality', 'hide_empty' => true] );
        foreach ( $_terms as $_term ) {
            $term_id[] = $_term->term_id;
        }
        $args['tax_query'] = array(
            array(
                'taxonomy' => 'job-speciality',
                'field'    => 'term_id',
                'terms'    => $term_id,
            ),
        );
    }
}

if ( !empty( $ql ) ) {
    if ( !in_array('all', $ql ) ) {
        $args['meta_query'] = array(
            array(
                'key'     => 'qualification',
                'value'   => $ql,
                'compare' => 'IN',
            ),
        );
    } else {
        $args['meta_query'] = array(
            array(
                'key'     => 'qualification',
                'compare' => 'EXISTS',
            ),
        );
    }
}

if ( !empty( $experience ) ) {
    if ( !in_array('all', $experience ) ) {
        $args['meta_query'] = array(
            array(
                'key'     => 'experience',
                'value'   => strval( $experience ),
                'compare' => 'IN',
            ),
        );
    } else {
        $args['meta_query'] = array(
            array(
                'key'     => 'experience',
                'compare' => 'EXISTS',
            ),
        );
    }
}