/** * 5GWorldPro Glossary A-Z Letter Filter * * Add this snippet in Code Snippets plugin. * * SETUP: * 1. In Elementor → Posts widget → Query section → set Query ID to: glossary_filter * 2. In Appearance → Menus → "glossary" menu → update each letter URL * Example: A → https://5gworldpro.com/5g-terms-and-acronyms/?letter=A * B → https://5gworldpro.com/5g-terms-and-acronyms/?letter=B * etc. * 3. Add a "Show All" menu item → https://5gworldpro.com/5g-terms-and-acronyms/ */ // Hook into Elementor's query system using the Query ID "glossary_filter" add_action( 'elementor/query/glossary_filter', function( $query ) { // Check if a letter parameter is present in the URL $letter = isset( $_GET['letter'] ) ? sanitize_text_field( $_GET['letter'] ) : ''; // Only filter if we have a valid single letter if ( ! empty( $letter ) && preg_match( '/^[A-Za-z0-9]$/', $letter ) ) { // Use MySQL LIKE to match titles starting with that letter global $wpdb; // Get IDs of pages whose titles start with the chosen letter $letter_upper = strtoupper( $letter ); $letter_lower = strtolower( $letter ); // For numeric prefixes like "2G", "3G", "4G", "5G" if ( is_numeric( $letter ) ) { $like_pattern = $wpdb->esc_like( $letter ) . '%'; } else { $like_pattern = $wpdb->esc_like( $letter_upper ) . '%'; } $post_ids = $wpdb->get_col( $wpdb->prepare( "SELECT ID FROM {$wpdb->posts} WHERE post_type = 'page' AND post_status = 'publish' AND ( post_title LIKE %s OR post_title LIKE %s )", $like_pattern, strtolower( $letter ) . '%' ) ); if ( ! empty( $post_ids ) ) { $query->set( 'post__in', $post_ids ); $query->set( 'orderby', 'title' ); $query->set( 'order', 'ASC' ); } else { // No results — force empty $query->set( 'post__in', array( 0 ) ); } } }); // Optional: Highlight the active letter in the menu via CSS add_action( 'wp_head', function() { if ( ! isset( $_GET['letter'] ) ) return; $letter = strtoupper( sanitize_text_field( $_GET['letter'] ) ); ?> { "@context": "https://schema.org", "@graph": [ { "@type": "Organization", "@id": "https://5gworldpro.com/#organization", "name": "5GWorldPro", "url": "https://5gworldpro.com", "logo": "https://5gworldpro.com/wp-content/uploads/2020/05/5GWorld-Pro-Logo-Transparent-1.png", "contactPoint": { "@type": "ContactPoint", "email": "contact@5GWorldPro.com", "contactType": "customer service" } }, { "@type": "ItemList", "name": "5G Training Courses", "url": "https://5gworldpro.com/5g-training/", "description": "Comprehensive 5G training courses for telecom professionals, available online, live virtual, and on-site.", "numberOfItems": 47, "itemListElement": [ { "@type": "Course", "position": 1, "name": "5G Training for Everyone", "description": "The most complete and comprehensive 5G Training covering all 5G technical concepts including 5G NR, architecture, and new technologies.", "url": "https://5gworldpro.com/5g-training-for-everyone/", "provider": {"@type": "Organization", "name": "5GWorldPro", "url": "https://5gworldpro.com"} }, { "@type": "Course", "position": 2, "name": "5G New Radio Advanced Training", "description": "In-depth description of 5G New Radio technology as defined by 3GPP standards and specifications.", "url": "https://5gworldpro.com/5g-nr-advanced/", "provider": {"@type": "Organization", "name": "5GWorldPro", "url": "https://5gworldpro.com"} }, { "@type": "Course", "position": 3, "name": "5G Core and 5G Slicing Training", "description": "Deep dive into 5G Core network functions and 5G Network Slicing for Standalone architecture.", "url": "https://5gworldpro.com/5g-core-and-5g-slicing-training/", "provider": {"@type": "Organization", "name": "5GWorldPro", "url": "https://5gworldpro.com"} }, { "@type": "Course", "position": 4, "name": "5G Open RAN Training", "description": "Technical and business overview of Open RAN and O-RAN from the O-RAN Alliance perspective.", "url": "https://5gworldpro.com/5g-open-ran-training/", "provider": {"@type": "Organization", "name": "5GWorldPro", "url": "https://5gworldpro.com"} }, { "@type": "Course", "position": 5, "name": "5G Private Network Training", "description": "Deep dive into 5G Private Networks including drivers, challenges, deployment models and use cases.", "url": "https://5gworldpro.com/5g-private-network-training/", "provider": {"@type": "Organization", "name": "5GWorldPro", "url": "https://5gworldpro.com"} }, { "@type": "Course", "position": 6, "name": "5G KPI, Optimization and Troubleshooting Training", "description": "5G key network performance, counters, practical 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