How to customize code of yoast

Customizing the Sitemap Index

1. Exclude Post Types from Sitemap:

php
   add_filter( 'wpseo_sitemap_exclude_post_type', 'sitemap_exclude_post_type', 10, 2 );

   function sitemap_exclude_post_type( $value, $post_type ) {
       if ( $post_type == 'post_type_slug' ) {
           return true;
       }
   }
   

2. Exclude Multiple Post Types from Sitemap:

php
   add_filter( 'wpseo_sitemap_exclude_post_type', 'sitemap_exclude_post_type', 10, 2 );

   function sitemap_exclude_post_type( $value, $post_type ) {
       $post_type_to_exclude = array('post_type_slug1', 'post_type_slug2', 'post_type_slug3');
       if ( in_array( $post_type, $post_type_to_exclude ) ) {
           return true;
       }
   }
   

Customizing SEO Title Templates

1. Create Custom Title Template:

php
   add_filter( 'wpseo_title_template', 'custom_title_template' );

   function custom_title_template( $template ) {
       // Your custom title template code here
       return $template;
   }
   

Adding Custom Data to Page Analysis

1. Add Custom Data to Analysis:

php
   if ( typeof YoastSEO !== "undefined" && typeof YoastSEO.app !== "undefined" ) {
       new MyCustomDataPlugin();
   } else {
       jQuery( window ).on(
           'YoastSEO:ready',
           function() {
               new MyCustomDataPlugin();
           }
       );
   }
   

2. Creating the Plugin:

php
   class MyCustomDataPlugin {
       constructor() {
           // Ensure YoastSEO.js is present and can access the necessary features.
           if ( typeof YoastSEO === "undefined" || typeof YoastSEO.analysis === "undefined" || typeof YoastSEO.analysis.worker === "undefined" ) {
               return;
           }
           YoastSEO.app.registerPlugin( "MyCustomDataPlugin", { status: "ready" } );
           this.registerModifications();
       }

       registerModifications() {
           const callback = this.addContent.bind( this );
           // Ensure that the additional data is being seen as a modification to the content.
           YoastSEO.app.registerModification( "content", callback, "MyCustomDataPlugin", 10 );
       }

       addContent( data ) {
           data += "Hello, I'm some additional data!";
           return data;
       }
   }
   

Adding Custom Assessments

1. Registering the Plugin:

php
   function loadMyCustomPlugin() {
       new MyCustomPlugin();
   }

   if ( ! wp_installing() ) {
       add_action( 'plugins_loaded', 'loadMyCustomPlugin', 20 );
   }
   

2. Creating the Webworker:

php
   class CustomWorker {
       constructor() {
           this._worker = analysisWorker;
       }

       register() {
           this._worker.registerMessageHandler( "initialize", this.initialize.bind( this ), "MyCustomAssessmentPlugin" );
       }

       initialize( settings ) {
           // Your custom assessment code here
       }
   }
   

Customizing Snippets

1. Add Custom Template Variables:

php
   add_action('wpseo_register_extra_replacements', 'register_custom_yoast_variables');

   function get_myname() {
       return 'My name is Moses';
   }

   function register_custom_yoast_variables() {
       wpseo_register_var_replacement( '%%myname%%', 'get_myname', 'advanced', 'some help text' );
   }
   

2. Alter the Number of Sitemap Entries:

php
   add_filter( 'wpseo_sitemap_entries_per_page', 'max_entries_per_sitemap' );

   function max_entries_per_sitemap() {
       return 100;
   }
   

These are just a few examples of how to customize the code of Yoast SEO. For more detailed information and specific use cases, refer to the Yoast SEO documentation and the WordPress Codex.