php error

This tips is not working..

I’ve installed the plugin and this errors showed in archive page of a CPT.
Doing debug the exception is due to this scenario

// in /plugins/seo-by-rank-math/includes/opengraph/class-image.php 
// line  602

/**
   * Check if archive has an image and add this image.
   */
  private function set_archive_image() {

   // NOTE: 
   // request url: "my-site.com/my-cpt"
   // this url is the post archive page of "my-cpt"

    $post_type = get_query_var('post_type');
    
    // In my case, and i don't know why the returned value 
    // of "get_query_var" is not a string but an array of string 
    // $post_type = [ "my-cpt" ]
    // 

    // because of this in the next line (👇)
    // string interpolation  will fail
    // and trigger the exception "array to string conversion..." 
    //
    $image_id  = Helper::get_settings("titles.pt_{$post_type}_facebook_image_id");
    $this->add_image_by_id($image_id);
  }

I modified the code like this and it works

private function set_archive_image() {
    $post_type = get_query_var('post_type');
    
    // sometimes "post_type" returns array of string 
    // instead of string
    if (is_array($post_type)) $post_type = $post_type[0];

    $image_id  = Helper::get_settings("titles.pt_{$post_type}_facebook_image_id");
    $this->add_image_by_id($image_id);
  }

But until you don’t include the same in the plugin code i cannot update it

• This reply was modified 2 years, 7 months ago by Jacopo Marrone (@tresorama).

I used ACF to register CPT.

this is the JSON

{
    "key": "post_type_64dea13278e29",
    "title": "Experiences",
    "menu_order": 0,
    "active": true,
    "post_type": "bookable-tour",
    "advanced_configuration": true,
    "import_source": "",
    "import_date": "",
    "labels": {
        "name": "Experiences",
        "singular_name": "Experience",
        "menu_name": "Experiences",
        "all_items": "All Experiences",
        "edit_item": "Edit Experience",
        "view_item": "View Experience",
        "view_items": "View Experiences",
        "add_new_item": "Add New Experience",
        "add_new": "",
        "new_item": "New Experience",
        "parent_item_colon": "Parent Experience:",
        "search_items": "Search Experiences",
        "not_found": "No experiences found",
        "not_found_in_trash": "No experiences found in Trash",
        "archives": "Experience Archives",
        "attributes": "Experience Attributes",
        "featured_image": "",
        "set_featured_image": "",
        "remove_featured_image": "",
        "use_featured_image": "",
        "insert_into_item": "Insert into experience",
        "uploaded_to_this_item": "Uploaded to this experience",
        "filter_items_list": "Filter experiences list",
        "filter_by_date": "Filter experiences by date",
        "items_list_navigation": "Experiences list navigation",
        "items_list": "Experiences list",
        "item_published": "Experience published.",
        "item_published_privately": "Experience published privately.",
        "item_reverted_to_draft": "Experience reverted to draft.",
        "item_scheduled": "Experience scheduled.",
        "item_updated": "Experience updated.",
        "item_link": "Experience Link",
        "item_link_description": "A link to a experience."
    },
    "description": "",
    "public": true,
    "hierarchical": false,
    "exclude_from_search": false,
    "publicly_queryable": true,
    "show_ui": true,
    "show_in_menu": true,
    "admin_menu_parent": "",
    "show_in_admin_bar": true,
    "show_in_nav_menus": true,
    "show_in_rest": true,
    "rest_base": "",
    "rest_namespace": "wp\/v2",
    "rest_controller_class": "WP_REST_Posts_Controller",
    "menu_position": "",
    "menu_icon": "",
    "rename_capabilities": false,
    "singular_capability_name": "post",
    "plural_capability_name": "posts",
    "supports": [
        "title",
        "excerpt",
        "revisions",
        "thumbnail"
    ],
    "taxonomies": "",
    "has_archive": true,
    "has_archive_slug": "",
    "rewrite": {
        "permalink_rewrite": "post_type_key",
        "with_front": "1",
        "feeds": "0",
        "pages": "1"
    },
    "query_var": "post_type_key",
    "query_var_name": "",
    "can_export": true,
    "delete_with_user": false,
    "register_meta_box_cb": "",
    "modified": 1695644506
}

Quick-fix in wp-config.php

The easiest way to hide those warnings and notices is to disable error reporting in the wp-config.php file:

ini_set('display_errors','Off');
ini_set('error_reporting', E_ALL );
define('WP_DEBUG', false);
define('WP_DEBUG_DISPLAY', false);

@rankmathsupport I get the same error on the custom posts search page. An example is this page where get_query_var returns an array as a result:

["guide"]=> string(5) "guide"

The solution indicated by @tresorama was only partially correct (the array also uses the custom post type slug as an index and does not use a numeric value). To resolve the warning you need to add the following code before line 606:

if ( is_array($post_type) ) $post_type = reset( $post_type );

which extracts the custom post type slug.