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Find all Pages that Contain a Gravity Form
<?php
/**
* Finds pages that contain a particular Gravity Form.
*/
class Gravity_Forms_Shortcode_Finder {
/**
* ID of the Gravity Form to search for.
*
* @var int
*/
private $form_id;
/**
* @param int $form_id ID of the Gravity Form to search for.
*/
public function __construct( $form_id ) {
$this->form_id = (int) $form_id;
}
/**
* @return array Pages that contain the form. Array is in this format: $post_id => $post_title
*/
public function find() {
return array_reduce( $this->get_all_page_ids(), function( $pages, $page_id ) {
if ( in_array( $this->form_id, $this->get_form_ids_in_post_content( $page_id ), true ) ) {
$pages[ $page_id ] = get_the_title( $page_id );
}
return $pages;
}, [] );
}
/**
* @return array Post IDs for all pages.
*/
private function get_all_page_ids() {
return ( new WP_Query( [
'post_type' => 'page',
'posts_per_page' => 1000,
'no_found_rows' => true,
'fields' => 'ids',
'update_post_meta_cache' => false,
'update_post_term_cache' => false,
] ) )->get_posts();
}
/**
* @param int $page_id Page ID.
*
* @return array Gravity Form IDs.
*/
private function get_form_ids_in_post_content( $page_id ) {
$content = get_post_field( 'post_content', $page_id );
return $this->get_shortcode_ids( $this->get_shortcodes_from_content( $content, 'gravityform' ) );
}
/**
* @param string $content Post content.
* @param string $shortcode The shortcode to search for.
*
* @return array The shortcodes found or empty array if none.
*/
private function get_shortcodes_from_content( $content, $shortcode ) {
$matches_found = preg_match_all( '/' . get_shortcode_regex() . '/s', $content, $matches );
if ( ! $matches_found || empty( $matches[2] ) || ! in_array( $shortcode, $matches[2], true ) ) {
return [];
}
return $matches[0];
}
/**
* Extracts IDs from shortcodes.
*
* @param string $shortcodes The shortcodes to get the IDs from.
*
* @return array $ids The shortcode IDs.
*/
private function get_shortcode_ids( array $shortcodes ) {
return array_reduce( $shortcodes, function( $ids, $shortcode ) {
$id = $this->get_shortcode_id( $shortcode );
if ( $id ) {
$ids[] = $id;
}
return $ids;
}, [] );
}
/**
* Extract the 'id' parameter from a shortcode.
*
* @param string $shortcode The shortcode.
*
* @return int The ID, or 0 if none found.
*/
private function get_shortcode_id( $shortcode ) {
$match_found = preg_match( '~id=[\"\']?([^\"\'\s]+)[\"\']?~i', $shortcode, $form_id );
return $match_found ? (int) $form_id[1] : 0;
}
}
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