The code Is Read More Function For WordPress, You Can use it for read more thank you

wp readmore function

function zboom_defult_functions(){
    function read_more($limit){
        $post_content = explode(' ',get_the_content());
        
        $less_content = array_slice($post_content, 0, $limit);
        
        echo implode(" ",$less_content );
        
    }
}
add_action("after_setup_theme", "zboom_defult_functions");

  <p><?php read_more(50); ?>....<a href='<?php the_permalink(); ?>'>[<b>read more</b>]</a></p>