How can I get the variable value I need - php

Question

how can I get the variable value I need, I have selected comments and like values through MySQL and have created a like button, but when I click like, it adds the like to the last selected/posted variable value, so it likes the last comment generated. How to I get it to like the one I wanted and not the last selected?
Example:
I have comments with id's (1,2,3) when generated it orders them in that order (1,2,3) when I like comment with id=2 it likes comment 3 because it was last generated so the varible id has a value of 3 at the time I liked comment 2.
I don't make any sense, I hope you guys get it, please help???

Answer 1

Let's say we have three comments all on the same post:
First Table: comments
id | post_id | comment
1 | 1 | "something"
2 | 1 | "something else"
3 | 1 | "something else entirely"
Second Table: comment_likes
id | comment_id
1 | 2
2 | 2
3 | 3
In this example, comment 2 would have 2 likes, and comment 3 one.
This might be the code to show our comments. The trick here is to add a custom attribute to the like link so we can detect the comment id in javascript.
<div class="comments">
<?php
$res = mysql_query('SELECT * FROM `comments` WHERE `post_id` = '.$post_id.';');
while ($row = mysql_fetch_array($res)) {
$cid = $row['id'];
echo '<div class="comment">';
echo $row['comment'].'<br />';
echo '<span class="like" comment-id="'.$cid.'">Like</span>';
$lres = mysql_query('SELECT COUNT(*) FROM `comment_likes` WHERE `comment_id` = '.$cid.';');
$likes = mysql_result($lres,0);
echo '<span class="likes">';
if ($likes > 0) {
echo '<span class="num_likes">'.$likes.'</span>';
$p = ($likes > 1) ? 'people like' : 'person likes';
echo $likes.' '.$p.' this';
}
echo '</span>';
echo '</div>';
}
?>
</div>
Now the JavaScript (using jQuery):
$(document).ready(function() {
$('.like').click(function() {
var id = $(this).attr('comment-id');
$.ajax({
url: 'add_like.php',
method: 'POST',
data: {'id':id},
success: function(res) {
if (res === '1') {
var likes = $('.like[comment-id='+id+']').find('.num_likes').text();
likes++;
var p = likes > 1 ? 'people like' : 'person likes';
var html = '<span class="num_likes">'+likes+'</span> '+p+' this';
$('.like[comment-id='+id+']').find('likes').html(html);
}
else alert('Error Liking Comment');
},
error: function() { alert('Error liking comment'); }
});
});
});
And the PHP (for the AJAX) - add_like.php
<?php
if (!isset($_POST['id'])) exit;
$id = $_POST['id'];
// connect / select db
$res = mysql_query('INSERT INTO `comment_likes` WHERE `comment_id` = '.$id.';');
if ($res) {
die(1); // success
}
die(0);
?>
Obviously you'd want to expand this for liking/un-liking - because at the moment the user can like multiple times but you get the idea.

Answer 2

note.php
//-------- WHILE LOOP FOR GETTING NOTE COMMENTS -------
$commentsList = array();
$query = mysql_query("SELECT * FROM note_comments WHERE note_id='$note_id'");
while (($row = mysql_fetch_assoc($query)) != false) {
$commentsList[] = array(
'comId' => $row['id'],
'comment' => $row['comment'],
'com_likes' => $row['likes'],
'com_likers' => $row['likers']
);
}
note.php (body):
<div id="noteComments">
<h2>Comments</h2>
<?php
$commentL = $commentsList;
if (count($commentL) == 0) {
echo 'Sorry, there are no comments.';
} else {
echo '<ul style="list-style:none;">';
foreach($commentL as $comment) {
echo '<li><p>', $comment['comment'], '</p><p><a style="background-color:#3b3c3b; color:#fff;
text-decoration:none; padding: 1 5 1 5; border-radius:5px; border: 1px solid black; " href="#" onclick="like_add(', $comment['comId'] ,');">Like</a><span id="comment_', $comment['comId'] ,'_likes">', $comment['com_likes'] , '</span> like this</p></li>';
}
echo '</ul>';
}
?>
</div><!-- end noteComments -->
like.js
function like_add(comId) {
$.post('ajax/like_add.php', {comId:comId}, function(data) {
if (data == 'success') {
like_get(comId);
} else {
alert(data);
}
});
}
function like_get(comId) {
$.post('ajax/like_get.php', {comId:comId}, function(data) {
$('#comment_'+comId+'_likes').text(data);
});
}
like_add.php
<?php
include_once("../scripts/checkuserlog.php");
include '../functions/like.php';
if (isset($_POST['comId']) && comment_exists($_POST['comId'])) {
$comId = $_POST['comId'];
add_like($comId);
}
?>
like_get.php
<?php
include '../scripts/checkuserlog.php';
include '../functions/like.php';
if (isset($_POST['comId']) && comment_exists($_POST['comId'])) {
echo like_count($_POST['comId']);
}
?>
like.php
<?php
function comment_exists($comId) {
$comId = (int)$comId;
return (mysql_result(mysql_query("SELECT COUNT('id') FROM note_comments WHERE id=$comId"), 0) == 0) ? false : true;
}
function like_count($comId) {
$comId = (int)$comId;
return (int)mysql_result(mysql_query("SELECT likes FROM note_comments WHERE id=$comId"), 0, 'likes');
}
function add_like($comId) {
$comId = (int)$comId;
$visitor = $_SESSION['id'];
$com_likers = "";
$query = mysql_query("SELECT likes, likers FROM note_comments WHERE id='$comId'");
while (($row = mysql_fetch_array($query)) != false) {
$com_likes = $row['likes'];
$com_likers = $row['likers'];
}
$thisComlikers = explode(",", $com_likers);
if (!in_array($visitor, $thisComlikers)) {
if ($com_likers != "") { $com_likers = "$com_likers,$visitor"; } else { $com_likers = "$visitor"; }
mysql_query("UPDATE note_comments SET likes = likes + 1 WHERE id=$comId")or die (mysql_error());
mysql_query("UPDATE note_comments SET likers =$com_likers WHERE id=$comId")or die (mysql_error());
echo 'success';
} else {
echo 'You have already liked this!';
}
}
?>