functions.php dosyasına eklenecek kodlar:

add_action('wp_ajax_nopriv_ayas-begen', 'begen');
    add_action('wp_ajax_ayas-begen', 'begen');

    wp_enqueue_script('makale_begen', get_template_directory_uri().'/js/begen.js', array('jquery'), '1.0', true );
    wp_localize_script('makale_begen', 'ajax_var', array(
        'url' => admin_url('admin-ajax.php'),
        'nonce' => wp_create_nonce('ajax-nonce')
    ));
    

    $begen_zaman_sayaci = 1440; // 1 gün
    function begen(){
        $nonce = $_POST['nonce'];
      
        if ( ! wp_verify_nonce( $nonce, 'ajax-nonce' ) )
            die ( 'Busted!');
        
        if(isset($_POST['begen']))
        {
            $ip = $_SERVER['REMOTE_ADDR'];
            $post_id = $_POST['post_id'];
            
            $meta_IP = get_post_meta($post_id, "voted_IP");
            $voted_IP = $meta_IP[0];
    
            if(!is_array($voted_IP))
                $voted_IP = array();
            
            $meta_count = get_post_meta($post_id, "votes_count", true);
    
            if(!begen_kontrol($post_id))
            {
                $voted_IP[$ip] = time();
    
                update_post_meta($post_id, "voted_IP", $voted_IP);
                update_post_meta($post_id, "votes_count", ++$meta_count);
                
                echo $meta_count;
            }
            else
                echo "already";
        }
        exit;
    }
    function begen_kontrol($post_id)
    {
        global $begen_zaman_sayaci;
    
        $meta_IP = get_post_meta($post_id, "voted_IP");
        $voted_IP = $meta_IP[0];
        
        if(!is_array($voted_IP))
            $voted_IP = array();
            
        $ip = $_SERVER['REMOTE_ADDR'];
        
        if(in_array($ip, array_keys($voted_IP)))
        {
            $time = $voted_IP[$ip];
            $now = time();
            
            if(round(($now - $time) / 60) > $begen_zaman_sayaci)
                return false;
                
            return true;
        }
        return false;
    }


    function ayasBegen($post_id){

        $begenme_sayisi = get_post_meta($post_id, "votes_count", true);
        $cikis = '<div class="makaleBegen"><a href="#" data-post_id="'.$post_id.'"><i class="fa fa-heart"></i>';
        if(begen_kontrol($post_id))
            $cikis .= '<p>Beğendin</p>';
        else
            $cikis .= '<p>Beğen !</p>';
        
        if($begenme_sayisi != 0 || $begenme_sayisi != null)
            $cikis .= '<span class="begeniSayisi">('.$begenme_sayisi.')</span>';
        else
            $cikis .= '<span class="begeniSayisi">'.$begenme_sayisi.'</span>';
        $cikis .= '</a></div>';
        return $cikis;
    }

temanızın js klasörüne begen.js adında dosya açıp şunları yazın:

jQuery(document).ready(function(){jQuery(".makaleBegen a").click(function(){return kalp=jQuery(this),post_id=kalp.data("post_id"),jQuery.ajax({type:"post",url:ajax_var.url,data:"action=ayas-begen&nonce="+ajax_var.nonce+"&begen=&post_id="+post_id,success:function(a){"already"!=a&&(kalp.addClass("voted"),kalp.find("p").html("Beğendin !"),kalp.find(".begeniSayisi").html("("+a+")"))}}),!1})});

Daha sonra kullanmak istediğin sayfaya şunu ekleyin (single.php):

<?php echo ayasBegen(get_the_ID());?>