Search & Filter Shortcode

function shortcode( $atts, $content = null ) {
			// Extract the attributes into variables.
			extract(
				shortcode_atts(
					array(

						'fields'             => null,
						'taxonomies'         => null, // Will be deprecated - use `fields` instead.
						'submit_label'       => null,
						'submitlabel'        => null, // Will be deprecated - use `submit_label` instead.
						'search_placeholder' => 'Search …',
						'types'              => '',
						'type'               => '', // Will be deprecated - use `types` instead.
						'headings'           => '',
						'all_items_labels'   => '',
						'class'              => '',
						'post_types'         => '',
						'hierarchical'       => '',
						'hide_empty'         => '',
						'order_by'           => '',
						'show_count'         => '',
						'order_dir'          => '',
						'operators'          => '',
						'add_search_param'   => '0',
						'empty_search_url'   => '',

					),
					$atts
				)
			);

			// Init `fields`.
			if ( $fields != null ) {
				$fields = explode( ',', $fields );
			} else {
				$fields = explode( ',', $taxonomies );
			}

			$this->taxonomylist = $fields;
			$nofields           = count( $fields );

			$add_search_param = (int) $add_search_param;

			// Init `submitlabel`.
			if ( $submitlabel !== null ) {
				// Then the old "submitlabel" has been supplied.
				if ( $submit_label === null ) {
					// Then the new label has not been supplied so do nothing/
					$submit_label = $submitlabel;
				}
			} elseif ( $submitlabel === null ) {
				if ( $submit_label === null ) {
					$submit_label = 'Submit';
				}
			}

			// Init `post_types`.
			if ( $post_types !== '' ) {
				$post_types = explode( ',', $post_types );
			} else {
				if ( in_array( 'post_types', $fields, true ) ) {
					$post_types = array( 'all' );
				}
			}

			// Init `hierarchical`.
			if ( $hierarchical != '' ) {
				$hierarchical = explode( ',', $hierarchical );
			} else {
				$hierarchical = array( '' );
			}

			// Init `hide_empty`.
			if ( $hide_empty != '' ) {
				$hide_empty = explode( ',', $hide_empty );
			} else {
				$hide_empty = array( '' );
			}

			// Init `show_count`.
			if ( $show_count !== '' ) {
				$show_count = explode( ',', $show_count );
			} else {
				$show_count = array();
			}

			// Init `order_by`.
			if ( $order_by !== '' ) {
				$order_by = explode( ',', $order_by );
			} else {
				$order_by = array( '' );
			}

			// Init `order_dir`.
			if ( $order_dir !== '' ) {
				$order_dir = explode( ',', $order_dir );
			} else {
				$order_dir = array( '' );
			}

			// Init `operators`.
			if ( $operators !== '' ) {
				$operators = explode( ',', $operators );
			} else {
				$operators = array( '' );
			}

			// Init `labels`.
			$labels = explode( ',', $headings );

			if ( ! is_array( $labels ) ) {
				$labels = array();
			}

			// Init `all_items_labels`.
			$all_items_labels = explode( ',', $all_items_labels );

			if ( ! is_array( $all_items_labels ) ) {
				$all_items_labels = array();
			}

			// Init `types`.
			if ( $types != null ) {
				$types = explode( ',', $types );
			} else {
				$types = explode( ',', $type );
			}

			if ( ! is_array( $types ) ) {
				$types = array();
			}

			// Loop through Fields and set up default vars.
			for ( $i = 0; $i < $nofields; $i++ ) {
				// Set up types.
				if ( isset( $types[ $i ] ) ) {
					// Check for post date field.
					if ( $fields[ $i ] == 'post_date' ) {
						if ( ( $types[ $i ] != 'date' ) && ( $types[ $i ] != 'daterange' ) ) {
							// If not expected value use default.
							$types[ $i ] = 'date';
						}
					} else {
						// Everything else can use a standard form input - checkbox/radio/dropdown/list/multiselect.
						if ( ( $types[ $i ] !== 'select' ) && ( $types[ $i ] !== 'checkbox' ) && ( $types[ $i ] !== 'radio' ) && ( $types[ $i ] !== 'list' ) && ( $types[ $i ] !== 'multiselect' ) ) {
							$types[ $i ] = 'select'; // Use default.
						}
					}
				} else {
					// Omitted, so set default.
					if ( $fields[ $i ] === 'post_date' ) {
						$types[ $i ] = 'date';
					} else {
						$types[ $i ] = 'select';
					}
				}

				// Setup labels.
				if ( ! isset( $labels[ $i ] ) ) {
					$labels[ $i ] = '';
				}

				// Setup all_items_labels.
				if ( ! isset( $all_items_labels[ $i ] ) ) {
					$all_items_labels[ $i ] = '';
				}

				if ( isset( $order_by[ $i ] ) ) {
					if ( ( $order_by[ $i ] !== 'id' ) && ( $order_by[ $i ] !== 'name' ) && ( $order_by[ $i ] !== 'slug' ) && ( $order_by[ $i ] !== 'count' ) && ( $order_by[ $i ] !== 'term_group' ) ) {
						$order_by[ $i ] = 'name'; // Use default - possible typo or use of unknown value.
					}
				} else {
					$order_by[ $i ] = 'name'; // Use default.
				}

				if ( isset( $order_dir[ $i ] ) ) {
					if ( ( $order_dir[ $i ] !== 'asc' ) && ( $order_dir[ $i ] !== 'desc' ) ) {
						// Then order_dir is not a wanted value, set to default.
						$order_dir[ $i ] = 'asc';
					}
				} else {
					$order_dir[ $i ] = 'asc'; // Use default value.
				}

				if ( isset( $operators[ $i ] ) ) {
					$operators[ $i ] = strtolower( $operators[ $i ] );

					if ( ( $operators[ $i ] !== 'and' ) && ( $operators[ $i ] !== 'or' ) ) {
						$operators[ $i ] = 'and'; // Else use default - possible typo or use of unknown value.
					}
				} else {
					$operators[ $i ] = 'and'; // Use default value.
				}
			}

			// Set all form defaults / dropdowns etc.
			$this->set_defaults();

			return $this->get_search_filter_form( $submit_label, $search_placeholder, $fields, $types, $labels, $hierarchical, $hide_empty, $show_count, $post_types, $order_by, $order_dir, $operators, $all_items_labels, $empty_search_url, $add_search_param, $class );
		}