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<?php |
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/** |
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* If standard single navigation using previous_post_link and next_post_link don't work try this function. |
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* By default this function uses date criteria to find next and previous post. See the default values below. |
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* |
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*/ |
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function px_get_custom_post_nav( $args = array() ) |
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{ |
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if( ! is_single() ) { |
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return; |
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} |
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$defaults = array( |
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'post_id' => get_the_ID(), |
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'orderby' => 'date', |
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'post_type' => 'post', |
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'taxonomy' => null, |
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'in_same_term' => true, |
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'meta_query' => array(), |
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'output' => 'html' |
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); |
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$args = wp_parse_args($args, $defaults); |
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$output = array(); |
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$current_post_date = get_the_date('r', $args['post_id']); |
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$query_args = array( |
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'post_type' => $args['post_type'], |
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'meta_query' => $args['meta_query'], |
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'orderby' => $args['orderby'] |
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); |
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if( true === $args['in_same_term'] && null !== $args['taxonomy'] ) |
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{ |
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if( ! taxonomy_exists($args['taxonomy']) ) { |
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return new WP_Error( 'invalid_taxonomy', __('Invalid taxonomy') ); |
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} |
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$terms = wp_get_post_terms($args['post_id'], $args['taxonomy'], array('fields' => 'ids')); |
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$query_args = array_merge($query_args, array( |
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'tax_query' => array( |
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array( |
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'taxonomy' => $args['taxonomy'], |
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'fields' => 'term_id', |
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'terms' => (int) @$terms[0] |
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) |
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) |
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) |
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); |
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} |
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$query_args = array_merge(apply_filters('px_get_custom_post_nav_query_args', $query_args), array( |
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'posts_per_page' => 1, |
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'post__not_in' => array($args['post_id']) |
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) |
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); |
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$prev_query = new WP_Query( |
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array_merge($query_args, |
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array( |
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'order' => 'ASC', |
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'date_query' => array( |
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array( |
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'after' => $current_post_date |
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) |
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) |
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) |
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) |
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); |
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$next_query = new WP_Query( |
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array_merge($query_args, |
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array( |
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'order' => 'DESC', |
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'date_query' => array( |
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array( |
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'before' => $current_post_date |
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) |
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) |
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) |
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) |
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); |
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wp_reset_postdata(); |
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if( 'array' === $args['output'] ) |
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{ |
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return array( |
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'prev_post_url' => isset($prev_query->posts[0]->ID) ? esc_url(get_permalink($prev_query->posts[0]->ID)) : null, |
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'next_post_url' => isset($next_query->posts[0]->ID) ? esc_url(get_permalink($next_query->posts[0]->ID)) : null |
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); |
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} |
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$output[]= '<nav class="nav-images">'; |
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if( isset($prev_query->posts[0]) ) { |
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$output[]= sprintf('<a href="%s" class="nav-images__btn prev"><span class="sr-only">%s</span></a>', esc_url(get_permalink($prev_query->posts[0]->ID)), __('Previous')); |
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} |
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if( isset($next_query->posts[0]) ) { |
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$output[]= sprintf('<a href="%s" class="nav-images__btn next"><span class="sr-only">%s</span></a>', esc_url(get_permalink($next_query->posts[0]->ID)), __('Next')); |
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} |
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$output[]= '</nav>'; |
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return apply_filters('px_get_custom_post_nav_output', implode("\n", $output)); |
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} |
