А так чтобы поставить/удалить лайк:

Вот мой код:

wall.js:

const SET_LIKE = 'like.php';
function p_gll() // get_like_list
{
//<div class="tooltip">' . $str_users_likes . '</div>
}
function p_sl(postid, likeid, uid) // set_like
{
  var timer1 = null;
  var timer2 = null;
  var persons_text = '';
  $$.ajax(path + SET_LIKE, 'POST', 'cmd=1&type=like&lid=' + likeid + '&uid=' + uid, function(value) 
  {
    $('post_like_' + postid).text(value);
    $('post_like_' + postid).attr('onclick', 'p_usl(' + postid + ', ' + likeid + ');');
    if(value != '' && value != null)
    {    
      timer1 = setTimeout(function() {
        $$.ajax(path + SET_LIKE, 'POST', 'cmd=3&lid=' + likeid, function(persons)
        {
          persons_text = persons;
        });    
      }, 100);
      timer2 = setTimeout(function() {
        $$.ajax(path + SET_LIKE, 'POST', 'cmd=2&lid=' + likeid, function(count)
        {
          if(persons_text == '')
            $('like_counter_' + postid).text(count);
          else 
            $('like_counter_' + postid).text('<div class="tooltip_likes">' + persons_text + '</div>' + count);
        });    
      }, 200);
    }
  });
    clearTimeout(timer1);
  clearTimeout(timer2);
}
function p_usl(postid, likeid, uid) // un_set_like
{
  var timer1 = null;
  var timer2 = null;
  var persons_text = '';
  $$.ajax(path + SET_LIKE, 'POST', 'cmd=1&type=unlike&lid=' + likeid, function(value) 
  {
    $('post_like_' + postid).text(value);
    $('post_like_' + postid).attr('onclick', 'p_sl(' + postid + ', ' + likeid + ',' + uid +');');
    timer1 = setTimeout(function() {
      $$.ajax(path + SET_LIKE, 'POST', 'cmd=3&lid=' + likeid, function(persons)
      {
        persons_text = persons;
      });    
    }, 100);
    timer2 = setTimeout(function() {
      $$.ajax(path + SET_LIKE, 'POST', 'cmd=2&lid=' + likeid, function(count)
      {
        if(persons_text == '')
          $('like_counter_' + postid).text(count);
        else 
          $('like_counter_' + postid).text('<div class="tooltip_likes">' + persons_text + '</div>' + count);
      });    
    }, 100);
  });
  clearTimeout(timer1);
  clearTimeout(timer2);
}

like.php:

<?php
require_once('./config/config.php');
require_once('./libs/core/mod_core.php');
require_once('./libs/core/mod_database.php');
require_once('./libs/core/mod_like.php');
require_once('./libs/core/mod_notifications.php');
require_once('./libs/i18n/mod_i18n.php');
session_start();
if(!isset($_SESSION['UserID']))
  exit;

if(!isset($_POST['cmd']))
  exit;

$int_cmd = $_POST['cmd'];
if(core_is_logged_in())
{
  if($int_cmd == 1)
  {
    I18n_init();
    I18n_lang('./i18n/' . core_get_current_language() . '_like.php', './i18n/en_like.php');
    if($_POST['type'] == 'like')
    {
      like_set_like($_POST['lid'], $_SESSION['UserID'], 1);
      if($_SESSION['UserID'] != $_POST['uid'])
      {
        $str_now = date("y-m-d H:i:s");
        notifications_add_notification($_SESSION['UserID'], $_POST['uid'], NOTIFICATION_LIKE, $str_now, $_POST['lid']);
      }
      echo __('unlike');
    }
    if($_POST['type'] == 'unlike')
    {
      like_set_like($_POST['lid'], $_SESSION['UserID'], 0);
      echo __('like');
    }
    return ;
  }
  if($int_cmd == 2)
  {
    $int_likes_count =  like_get_like_count($_POST['lid']);
    if($int_likes_count <= 1)
      echo sprintf(__choice(__('likes'), 0), $int_likes_count);
    else if($int_likes_count > 1)
      echo sprintf(__choice(__('likes'), 1), $int_likes_count);
    exit;
  }
  if($int_cmd == 3)
  {
    $int_like_count = like_get_like_count($_POST['lid']);
    $arr_users_likes = like_get_like_users($_POST['lid'], 0, 5);
    foreach($arr_users_likes as $arr_user_like)
    {
      echo $arr_user_like['flname'];
      echo '<br />';
    }
    if($int_like_count > 5)
    {
      $int_other_count = $int_like_count - 5;
      if($int_other_count == 1)
         echo sprintf(__(__choice('other', 0)), $int_other_count);
      elseif($int_other_count > 1)
         echo sprintf(__(__choice('other', 1)), $int_other_count);
    }
  }
}
?>