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wpas.php
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<?php
/**
* WP Advanced Search
*
* A PHP framework for building advanced search forms in WordPress
*
* @author Sean Butze
* @link https://github.com/growthspark/wp-advanced-search
* @version 1.3
* @license GPLv3
*/
require_once('wpas-field.php');
require_once('wpas-walker.php');
if (!class_exists('WP_Advanced_Search')) {
class WP_Advanced_Search {
// Query Data
private $wp_query;
private $wp_query_args = array();
private $taxonomy_operators = array();
private $term_formats = array();
private $meta_keys = array();
private $orderby_relevanssi = 'relevance';
private $relevanssi = false;
private $orderby_values = array('ID','author','title','date','modified','parent','rand','comment_count','menu_order');
private $orderby_meta_keys = array();
// Form Input
private $fields = array();
private $form_args = array();
private $post_types = array();
private $selected_taxonomies = array();
private $selected_meta_keys = array();
private $the_form;
function __construct($args = '') {
if ( !empty($args) ) {
$this->process_args($args);
$this->build_form();
}
$this->convert_orderby();
$this->process_form_input();
}
/**
* Parses arguments and sets variables
*
* @since 1.0
*/
function process_args( $args ) {
if (isset($args['wp_query'])) {
$this->wp_query_args = $args['wp_query'];
if (isset($args['wp_query']['post_type'])) {
if (is_array($args['wp_query']['post_type']))
$this->post_types = $args['wp_query']['post_type'];
else
$this->post_types = array($args['wp_query']['post_type']);
}
}
if (isset($args['form']))
$this->form_args = $args['form'];
if (isset($args['fields']))
$this->fields = $args['fields'];
if (isset($args['relevanssi']))
$this->relevanssi = $args['relevanssi'];
$fields = $this->fields;
foreach ($fields as $field) {
if (isset($field['type'])) {
switch($field['type']) {
case 'taxonomy':
if (isset($field['taxonomy'])) {
$tax = $field['taxonomy'];
if (isset($field['operator'])) {
$operator = $field['operator'];
} else {
$operator = 'AND';
}
$this->taxonomy_operators[$tax] = $operator;
}
break;
case 'meta_key':
if (isset($field['meta_key'])) {
$meta = $field['meta_key'];
if (isset($field['compare'])) {
$operator = $field['compare'];
} else {
$operator = '=';
}
if (isset($field['data_type'])) {
$data_type = $field['data_type'];
} else {
$data_type = 'CHAR';
}
$this->meta_keys[$meta]['compare'] = $operator;
$this->meta_keys[$meta]['data_type'] = $data_type;
}
break;
case 'orderby':
if (isset($field['orderby_values']) && is_array($field['orderby_values'])) {
foreach ($field['orderby_values'] as $k=>$v) {
// Special handling for meta_key values
if (isset($v['meta_key']) && $v['meta_key']) {
if (isset($v['orderby']) && $v['orderby'] == 'meta_value_num') $type = $v['orderby'];
else $type = 'meta_value';
$this->orderby_meta_keys[$k] = $type;
}
}
}
break;
}
}
}
}
/**
* Generates the search form
*
* @since 1.0
*/
function build_form() {
global $post;
global $wp_query;
$defaults = array('action' => get_permalink($post->ID),
'method' => 'GET',
'id' => 'wp-advanced-search',
'name' => 'wp-advanced-search',
'class' => 'wp-advanced-search');
$args = wp_parse_args($this->form_args, $defaults);
$fields = $this->fields;
$tax_fields = array();
$has_search = false;
$has_submit = false;
$has_orderby = false;
$html = 1;
if (isset($_REQUEST['filter_page'])) {
$page = $_REQUEST['filter_page'];
} else {
$page = 1;
}
$output = '<form id="'.$args['id'].'" name="'.$args['name'].'" class="'.$args['class'].'" method="'.$args['method'].'" action="'.$args['action'].'">';
// URL fix if pretty permalinks are not enabled
if ( get_option('permalink_structure') == '' ) {
$output .= '<input type="hidden" name="page_id" value="'.$post->ID.'">';
}
foreach ($fields as $field) {
if (isset($field['type'])) {
switch($field['type']) {
case 'taxonomy':
if (isset($field['taxonomy']) && !in_array($field['taxonomy'], $tax_fields)) {
$tax_fields[] = $field['taxonomy'];
$output .= $this->tax_field($field);
}
break;
case 'meta_key':
$output .= $this->meta_field($field);
break;
case 'author':
$output .= $this->author_field($field);
break;
case 'date':
$output .= $this->date_field($field);
break;
case 'post_type':
$output .= $this->post_type_field($field);
break;
case 'order':
$output .= $this->order_field($field);
break;
case 'orderby':
$has_orderby = true;
$output .= $this->orderby_field($field);
break;
case 'html':
if (empty($field['id'])) {
$field['id'] = $html;
$html++;
}
$output .= $this->html_field($field);
break;
case 'generic':
$output .= $this->generic_field($field);
break;
case 'posts_per_page':
$output .= $this->posts_per_page_field($field);
break;
case 'search':
if (!$has_search) {
$output .= $this->search_field($field);
$has_search = true;
}
break;
case 'submit':
if (!$has_submit) {
$output .= $this->submit_button($field);
$has_submit = true;
}
break;
} //end switch
} //endif
} //endforeach
if ($this->relevanssi && !$has_orderby) {
$output .= '<input type="hidden" name="orderby" value="'.$this->orderby_relevanssi.'">';
}
$output .= '<input type="hidden" name="wpas" value="1">';
$output .= '</form>';
$this->the_form = $output;
}
/**
* Displays the search form
*
* @since 1.0
*/
function the_form() {
echo $this->the_form;
}
/**
* Generates a search field
*
* @since 1.0
*/
function search_field( $args ) {
$defaults = array(
'label' => '',
'format' => 'text',
'value' => ''
);
$args = wp_parse_args($args, $defaults);
$format = $args['format'];
if (isset($_REQUEST['search_query'])) {
$args['values'] = $_REQUEST['search_query'];
}
$field = new WPAS_Field('search_query', $args);
return $field->build_field();
}
/**
* Generates a submit button
*
* @since 1.0
*/
function submit_button( $args ) {
$defaults = array('value' => 'Search');
$args = wp_parse_args($args, $defaults);
extract($args);
$args['values'] = $value;
$args['format'] = 'submit';
$field = new WPAS_Field('submit', $args);
return $field->build_field();
}
/**
* Generates a form field containing terms for a given taxonomy
*
* @param array $args Arguments for configuring the field.
* @since 1.0
*/
function tax_field( $args ) {
$defaults = array(
'label' => '',
'taxonomy' => 'category',
'format' => 'select',
'term_format' => 'slug',
'hide_empty' => false,
'terms' => array(),
'nested' => false,
'term_args' => array()
);
$term_defaults = array(
'hide_empty' => false
);
$args = wp_parse_args($args, $defaults);
extract(wp_parse_args($args, $defaults));
$this->term_formats[$taxonomy] = $term_format;
$the_tax = get_taxonomy( $taxonomy );
$tax_name = $the_tax->labels->name;
$tax_slug = $the_tax->name;
if (!$the_tax) {
return;
}
if (isset($args['label'])) {
$label = $args['label'];
}
if (isset($term_args) && is_array($term_args)) {
$term_args = wp_parse_args($term_args, $term_defaults);
}
$terms_objects = array();
$term_values = array();
$walker = new WPAS_Terms_Walker(array('taxonomy' => $taxonomy,
'term_format' => $term_format),
$term_args);
$max_depth = ($args['nested']) ? 0 : -1;
if (isset($terms) && is_array($terms) && (count($terms) < 1)) {
// No terms specified; populate with all terms
if ($args['nested']) {
$term_values = $walker->build_nested_terms_array( $max_depth );
} else {
$term_values = $walker->build_basic_terms_array();
}
} else { // Custom term list
$args['nested'] = false; // Disallow nesting for custom term lists
foreach ($terms as $term_identifier) {
$term = get_term_by($term_format, $term_identifier, $taxonomy);
if ($term) {
$term_objects[] = $term;
}
}
foreach ($term_objects as $term) {
switch($term_format) {
case 'id' :
case 'ID' :
$term_values[$term->term_id] = $term->name;
break;
case 'Name' :
case 'name' :
$term_values[$term->name] = $term->name;
break;
default :
$term_values[$term->slug] = $term->name;
break;
}
}
}
if (empty($values)) {
// Populate with values unless this is a text or textarea field
if (!($format == 'text' || $format == 'textarea')) {
$args['values'] = $term_values;
}
}
$field = new WPAS_Field('tax_'.$tax_slug, $args);
return $field->build_field();
}
/**
* Generates a form field containing terms for a given meta key (custom field)
*
* @param array $args Arguments for configuring the field.
* @since 1.0
*/
function meta_field( $args ) {
$defaults = array(
'label' => '',
'meta_key' => '',
'format' => 'select',
'values' => array()
);
$args = wp_parse_args($args, $defaults);
$meta_key = $args['meta_key'];
$field = new WPAS_Field('meta_'.$meta_key, $args);
return $field->build_field();
}
/**
* Generates an order field
*
* @since 1.0
*/
function order_field( $args ) {
$defaults = array(
'label' => '',
'format' => 'select',
'orderby' => 'title',
'values' => array('ASC' => 'ASC', 'DESC' => 'DESC')
);
$args = wp_parse_args($args, $defaults);
$field = new WPAS_Field('order', $args);
return $field->build_field();
}
/**
* Generates an orderby field
*
* @since 1.0
*/
function orderby_field( $args ) {
$defaults = array('label' => '',
'format' => 'select',
'values' => array('ID' => 'ID',
'post_author' => 'Author',
'post_title' => 'Title',
'post_date' => 'Date',
'post_modified' => 'Modified',
'post_parent' => 'Parent ID',
'rand' => 'Random',
'comment_count' => 'Comment Count',
'menu_order' => 'Menu Order')
);
$args = wp_parse_args($args, $defaults);
if (isset($args['orderby_values']) && is_array($args['orderby_values'])) {
$args['values'] = array(); // orderby_values overrides normal values
foreach ($args['orderby_values'] as $k=>$v) {
if (isset($v['label'])) $label = $v['label'];
else $label = $k;
$args['values'][$k] = $label; // add to the values array
}
}
$field = new WPAS_Field('orderby', $args);
return $field->build_field();
}
/**
* Generates an author field
*
* @since 1.0
*/
function author_field( $args ) {
$defaults = array(
'label' => '',
'format' => 'select',
'authors' => array()
);
$args = wp_parse_args($args, $defaults);
$label = $args['label'];
$format = $args['format'];
$authors_list = $args['authors'];
$selected_authors = array();
if (isset($this->selected_authors)) {
$selected_authors = $this->selected_authors;
}
$the_authors_list = array();
if (count($authors_list) < 1) {
$authors = get_users();
foreach ($authors as $author) {
$the_authors_list[$author->ID] = $author->display_name;
}
} else {
foreach ($authors_list as $author) {
if (get_userdata($author)) {
$user = get_userdata($author);
$the_authors_list[$author] = $user->display_name;
}
}
}
$args['values'] = $the_authors_list;
$field = new WPAS_Field('a', $args);
return $field->build_field();
}
/**
* Generates a post type field
*
* @since 1.0
*/
function post_type_field( $args ) {
$defaults = array(
'label' => '',
'format' => 'select',
'values' => array('post' => 'Post', 'page' => 'Page')
);
$args = wp_parse_args($args, $defaults);
$label = $args['label'];
$format = $args['format'];
$values = $args['values'];
$selected_values = array();
if (isset($this->selected_post_types)) {
$selected_values = $this->selected_post_types;
}
if (count($values) < 1) {
$post_types = get_post_types(array('public' => true));
foreach ( $post_types as $post_type ) {
$obj = get_post_type_object($post_type);
$post_type_id = $obj->name;
$post_type_name = $obj->labels->name;
$values[$post_type_id] = $post_type_name;
}
}
$args['values'] = $values;
$field = new WPAS_Field('ptype', $args);
return $field->build_field();
}
/**
* Generates a date field
*
* @since 1.0
*/
function date_field( $args ) {
$defaults = array(
'label' => '',
'id' => 'date_y',
'format' => 'select',
'date_type' => 'year',
'date_format' => false,
'values' => array() );
$args = wp_parse_args($args, $defaults);
extract($args);
$selected_values = array();
switch ($date_type) {
case ('year') :
if (count($values) < 1) {
$d_values = $this->get_dates('year',$date_format);
}
$id = 'date_y';
break;
case ('month') :
if (count($values) < 1) {
$d_values = $this->get_dates('month',$date_format);
}
$id = 'date_m';
break;
case ('day') :
if (count($values) < 1) {
$d_values = $this->get_dates('day',$date_format);
}
$id = 'date_d';
}
if (empty($values)) {
$args['values'] = $d_values;
}
$args['id'] = $id;
$field = new WPAS_Field($id, $args);
return $field->build_field();
}
/**
* Generates an HTML content field
*
* This "field" is not used for data entry but rather for inserting
* custom markup within the form body.
*
* @since 1.0
*/
function html_field( $args ) {
$defaults = array('id'=>1, 'value' => '');
extract(wp_parse_args($args, $defaults));
$args['format'] = 'html';
$args['values'] = $value;
$field = new WPAS_Field('html-'.$id, $args);
return $field->build_field();
}
/**
* Generates a generic form field
*
* Used for creating form fields that do not affect
* the WP_Query object
*
* @since 1.0
*/
function generic_field( $args ) {
$defaults = array();
extract(wp_parse_args($args, $defaults));
if (isset($id) && !empty($id)) {
$field = new WPAS_Field($id, $args);
return $field->build_field();
}
}
/**
* Generates a generic form field
*
* Used for creating form fields that do not affect
* the WP_Query object
*
* @since 1.0
*/
function posts_per_page_field( $args ) {
$defaults = array(
'format' => 'text',
'value' => ''
);
$args = wp_parse_args($args, $defaults);
$field = new WPAS_Field('posts_per_page', $args);
return $field->build_field();
}
/**
* Builds the tax_query component of our WP_Query object based on form input
*
* @since 1.0
*/
function build_tax_query() {
$query = $this->wp_query_args;
$taxonomies = $this->selected_taxonomies;
foreach ($taxonomies as $tax => $terms) {
$term_slugs = array(); // used when term_format is set to 'name'
$term_format = $this->term_formats[$tax];
$has_error = false;
if (isset($this->term_formats[$tax]))
$term_format = $this->term_formats[$tax];
else
$term_format = 'slug';
if ($term_format == 'name') {
if (!is_array($terms))
$terms = array($terms);
foreach ($terms as $term) {
$the_term = get_term_by('name', $term, $tax);
if ($the_term) {
$term_slugs[] = $the_term->slug;
} else {
$has_error = true;
$term_slugs[] = $term; // even if term invalid, we have to add it anyway to produce 0 results
}
}
$terms = $term_slugs;
$term_format = 'slug';
} else if (!($term_format == 'slug') && !($term_format == 'id')) {
$this->error('Invalid term_format for taxonomy "'.$tax.'"');
continue;
}
$this->wp_query_args['tax_query'][] = array(
'taxonomy' => $tax,
'field' => $term_format,
'terms' => $terms,
'operator' => $this->taxonomy_operators[$tax]
);
} // endforeach $taxonomies
}
/**
* Builds the meta_query component of our WP_Query object based on form input
*
* @since 1.0
*/
function build_meta_query() {
$meta_keys = $this->selected_meta_keys;
foreach ($meta_keys as $key => $values) {
if ($this->meta_keys[$key]['compare'] == 'BETWEEN') {
//Special handling for BETWEEN comparisons.
foreach($values as $value) {
if (strpos($value, '-')) {
$value_one = strstr($value,'-',true);
$value_two = substr(strstr($value, '-'),1);
if ($value_one == 0 || $value_two == 0) {
$values = 0;
$compare = '=';
} else {
$compare = $this->meta_keys[$key]['compare'];
$values = array($value_one, $value_two);
}
$this->wp_query_args['meta_query'][] = array(
'key' => $key,
'value' => $values,
'compare' => $compare,
'type' => $this->meta_keys[$key]['data_type']
);
} else {
$this->error('Invalid meta_value "'. $values .'"" for BETWEEN comparison.');
}
}
} else {
$this->wp_query_args['meta_query'][] = array(
'key' => $key,
'value' => $values,
'compare' => $this->meta_keys[$key]['compare'],
'type' => $this->meta_keys[$key]['data_type']
);
}
}
}
/**
* Processes form input and modifies the query accordingly
*
* @since 1.0
*/
function process_form_input() {
foreach ($_REQUEST as $request => $value) {
if ($value) {
$this->selected_fields[$request] = $value;
if (substr($request, 0, 4) == 'tax_') {
$tax = $this->tax_from_arg($request);
if ($tax) {
$this->selected_taxonomies[$tax] = $value;
}
} elseif (substr($request, 0, 5) == 'meta_') {
$meta = $this->meta_from_arg($request);
if ($meta) {
$this->selected_meta_keys[$meta] = $value;
}
} else {
$selected = array();
if (!is_array($value)) {
$selected[] = $value;
} else {
foreach ($value as $the_value) {
$selected[] = $the_value;
}
}
switch($request) {
case('a') :
$this->wp_query_args['author'] = implode(',', $selected);
break;
case('ptype') :
$this->post_types = $selected;
$this->wp_query_args['post_type'] = $selected;
break;
case('order') :
$this->wp_query_args['order'] = implode(',', $selected);
break;
case('orderby') :
$orderby = implode(',', $selected);
if (array_key_exists($orderby,$this->orderby_meta_keys)) {
$this->wp_query_args['orderby'] = $this->orderby_meta_keys[$orderby];
$this->wp_query_args['meta_key'] = $orderby;
} else {
$this->wp_query_args['orderby'] = $orderby;
}
break;
case('date_y') :
$this->wp_query_args['year'] = implode(',', $selected);
break;
case('date_m') :
$year = strstr(reset($selected), '-', true);
$month = substr(strstr(reset($selected), '-'), 1);
$this->wp_query_args['monthnum'] = $month;
$this->wp_query_args['year'] = $year;
break;
case('date_d') :
$dates = explode('-', reset($selected));
if (isset($dates[0])) $this->wp_query_args['year'] = $dates[0];
if (isset($dates[1])) $this->wp_query_args['month'] = $dates[1];
if (isset($dates[2])) $this->wp_query_args['day'] = $dates[2];
break;
case('posts_per_page') :
$ppp = implode(',', $selected);
$this->wp_query_args['posts_per_page'] = intval($ppp);
break;
case('search_query') :
$this->wp_query_args['s'] = implode(',', $selected);
break;
} // switch
} // endif
} // endif ($value)
}// endforeach $_REQUEST
}
/**
* Converts certain orderby keys into formats compatible with WP_Query
*
* @since 1.0
*/
function convert_orderby() {
if (isset($this->wp_query_args['orderby'])) {
switch($this->wp_query_args['orderby']) {
case 'post_title' :
case 'post_author' :
case 'post_date' :
case 'post_modified' :
case 'post_parent' :
case 'post_name' :
$this->orderby_relevanssi = $this->wp_query_args['orderby'];
$this->wp_query_args['orderby'] = substr($this->wp_query_args['orderby'], 5);
break;
}
}
}
/**
* Initializes a WP_Query object with the given search parameters
*
* @since 1.0
*/
function query() {
$this->build_tax_query();
$this->build_meta_query();
$this->convert_orderby();
// Apply pagination
if ( get_query_var('paged') ) {
$paged = get_query_var('paged');
} else if ( get_query_var('page') ) {
$paged = get_query_var('page');
} else {
$paged = 1;
}
$this->wp_query_args['paged'] = $paged;
$this->wp_query = new WP_Query($this->wp_query_args);
$query = $this->wp_query;
$query->query_vars['post_type'] = $this->wp_query_args['post_type'];
if ($this->relevanssi) {
include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
if (!empty($_REQUEST['search_query']) && is_plugin_active('relevanssi/relevanssi.php')) {
relevanssi_do_query($query);
}
}
if (defined('WPAS_DEBUG') && WPAS_DEBUG) {
echo '<pre>';
print_r($query);
echo '</pre>';
}
return $query;
}
/**
* Displays pagination links
*
* @since 1.0
*/
function pagination( $args = '' ) {
global $wp_query;
$current_page = max(1, get_query_var('paged'));
$total_pages = $wp_query->max_num_pages;
$big = '999999999';
$base = str_replace( $big, '%#%', esc_url( get_pagenum_link( $big ) ) );
$defaults = array(
'base' => $base,
'format' => 'page/%#%',
'current' => $current_page,
'total' => $total_pages
);
$args = wp_parse_args($args, $defaults);
if ($total_pages > 1){
echo '<div class="pagination">';
echo paginate_links($args);
echo '</div>';
}
}
/**
* Displays range of results displayed on the current page.
*
* @since 1.0
*/
function results_range( $args = array() ) {
global $wp_query;
$defaults = array(
'pre' => '',
'marker' => '-',
'post' => ''
);
$args = wp_parse_args($args, $defaults);
extract($args);
$total = $wp_query->found_posts;
$count = $wp_query->post_count;
$query = $wp_query->query;
$ppp = (!empty($query['posts_per_page'])) ? $query['posts_per_page'] : get_option('posts_per_page');
$page = get_query_var('paged');
$range = 1;
$range = $page;
if ($ppp > 1) {
$i = 1 + (($page - 1)*$ppp);
$j = $i + ($ppp - 1);
$range = sprintf('%d%s%d', $i, $marker, $j);
if ($j > $total) {
$range = $total;
}
}
if ($count < 1) {
$range = 0;
}
$output = sprintf('<span>%s</span> <span>%s</span> <span>%s</span>', $pre, $range, $post);
return $output;
}
/**
* Accepts a term slug & taxonomy and returns the ID of that term
*
* @since 1.0
*/
function term_slug_to_id( $term, $taxonomy ) {
$term = get_term_by('slug', $term, $taxonomy);
return $term->term_id;
}
/**
* Takes a specially-formatted taxonomy argument and returns the taxonomy name
*
* @since 1.0
*/
function tax_from_arg( $arg ) {
if (substr($arg, 0, 4) == 'tax_'){
$tax = substr($arg, 4, strlen($arg) - 4);
if (taxonomy_exists($tax)) {
return $tax;
} else {
return false;
}
} else {
return false;
}
}
/**
* Takes a specially-formatted meta_key argument and returns the meta_key
*
* @since 1.0
*/
function meta_from_arg( $arg ) {
if (substr($arg, 0, 5) == 'meta_'){
$meta = substr($arg, 5, strlen($arg) - 5);
return $meta;
} else {
return false;
}