Post reading time

post-reading-time.php

<?php

function ywp_reading_time() {
        global $post;
        
        if ( empty( $post ) ) {
                $post = get_the_ID();
        }
        
        if ( empty( $post ) ) {
                return;
        }
        
        $post_id = is_numeric( $post ) ? $post : $post->ID;
        
        // If yoast estimated the time, skip estimate
        $yoast_meta = get_post_meta( $post_id, '_yoast_wpseo_estimated-reading-time-minutes', true );
        
        if ( ! empty( $yoast_meta ) ) {
                return $yoast_meta . ' دقیقه';
        }
        
        $content = wp_strip_all_tags( get_the_content( $post_id ) );
        
        if ( empty( $content ) ) {
                return;
        }
        
        // Words count (alphabetic letters, digits, delimited phrases with hyphen/dash)
        preg_match_all('/[\pL\pN\pPd]+/u', $content, $matches);
        
        return ceil( count( $matches[0] ) / 200 ) . ' دقیقه';
}

add_shortcode('wpread', 'ywp_reading_time');

// The code goes to your active theme/child theme functions.php file.