<div class="contain">
  <div class="upvote-vetor">
    <a href="javascript:void(0)"><img alt="" src="images/upvotes.png" id="like_'.$post['id_post'].'" class="like"></a>
    <p id="likes_'.$post['id_post'].'">'.$upvote['upvotes'].' Up Votes</p>
 </div>

$(document).ready(function(){

    // like and unlike click
    $(".upvote-vetor").on("click",".like", function(){
        var id = this.id;   // Getting Button id
        var split_id = id.split("_");

        var text = split_id[0];
        var postid = split_id[1];  // postid
        // Finding click type
        var type = 1;
        // AJAX Request
        $.ajax({
            url: 'php/upvote.php',
            type: 'post',
            data: {postid:postid,type:type},
            dataType: 'json',
            success: function(data){
                var likes = data['likes'];

                $("#likes_"+postid).text(likes);        // setting likes

            },
            error: function(data){
                alert("error : " + JSON.stringify(data));
            }
        });
    });
});