So I had one plugin for Wordpress which I really wanted to use on one of my Drupal website. Naive approach was:
define('WP_USE_THEMES', false); include_once './wp/wp-blog-header.php';
Only to get:
Fatal error: Cannot redeclare timer_start() (previously declared in /home/ariel/wwwroot/drupal-mine/includes/bootstrap.inc:116) in /home/site/wwwroot/site/includes/bootstrap.inc on line 122
Turned out both Drupal and Wordpress define several function using same name (and neither uses namespaces, unfortunately.) After looking for other potential solutions, I decided to try to simply rename all offending functions inside Wordpress. Turned out it was just 4 of them:
find ./ -type f -exec sed -i 's/timer_start/wp_timer_start/g' {} \;
find ./ -type f -exec sed -i 's/timer_stop/wp_timer_stop/g' {} \;
find ./ -type f -exec sed -i 's/comment_form/wp_comment_form/g' {} \;
find ./ -type f -exec sed -i 's/image_resize/wp_image_resize/g' {} \;After that I was able to get through "redeclare" error.
Next task was to clean up "unnecessaries" (extra meta/title tags, emoji-related code, etc. Below is final code I came up with. It is header and footer pieces, and your wordpress-code should go in the middle:
define('WP_USE_THEMES', false); define('STYLESHEETPATH', ''); define('TEMPLATEPATH', ''); include_once './wp/wp-load.php'; global $wp_filter; function disable_wp_emojicons() { // all actions related to emojis remove_action( 'admin_print_styles', 'print_emoji_styles' ); remove_action( 'wp_head', 'print_emoji_detection_script', 7 ); remove_action( 'admin_print_scripts', 'print_emoji_detection_script' ); remove_action( 'wp_print_styles', 'print_emoji_styles' ); remove_filter( 'wp_mail', 'wp_staticize_emoji_for_email' ); remove_filter( 'the_content_feed', 'wp_staticize_emoji' ); remove_filter( 'comment_text_rss', 'wp_staticize_emoji' ); // filter to remove TinyMCE emojis add_filter( 'tiny_mce_plugins', 'disable_emojicons_tinymce' ); } disable_wp_emojicons(); remove_action('wp_head', 'dns-prefetch' ); remove_action('wp_head', 'wp_resource_hints', 2 ); remove_action('wp_head', 'rsd_link'); remove_action('wp_head', 'wlwmanifest_link'); remove_action('wp_head', 'wp_shortlink_wp_head'); remove_action('wp_head', 'wp_generator'); remove_action('wp_head', 'rest_output_link_wp_head'); remove_action('wp_head', 'wp_oembed_add_discovery_links'); remove_action('template_redirect', 'rest_output_link_header', 11, 0 ); ob_start(); wp_head(); # YOUR WP CODE GOES HERE (OPTIONAL) wp_footer(); $wpcode = ob_get_contents(); ob_end_clean(); echo preg_replace('/^.+jquery\/jquery.+$/m', '', $wpcode);
This will ensure that all necessary css/js from wordpress plugin is loaded.
Unfortunately, since i replaced code inside wordpress code base, after each wordpress update, i have to re-run functions renaming code again.. I probably simply disable updates for time being, since that wordpress site is not exposed any way except via invoking plugin code.