Code: Select all
<html>
<head>
<title>How to create a like/unlike button using jQuery and PHP</title>
<script src="http://code.jquery.com/jquery-1.3.2.min.js"></script>
<script>
function doAction(postid,type){
$.post('doAjax.php', {postid:postid, type:type}, function(data){
if(isNaN(parseFloat(data))){
alert(data);
}else{
$('#'+postid+'_'+type+'s').text(data);
}
});
}
</script>
</head>
<body>
<?php
include('db.php'); // including database connection.
$postid = 1; // default post id
$data = mysql_fetch_object(mysql_query('SELECT `like`,`unlike` FROM posts WHERE id="'.$postid.'"'));
?>
<a href="javascript:;" onclick="doAction('<?php echo $postid;?>','like');">Like (<span id="<?php echo $postid;?>_likes"><?php echo $data->like;?></span>)</a>
<a href="javascript:;" onclick="doAction('<?php echo $postid;?>','unlike');">Unlike (<span id="<?php echo $postid;?>_unlikes"><?php echo $data->unlike;?></span>)</a>
</body>
</html>Code: Select all
<?php
$host = 'localhost';
$user = 'root';
$pass = '';
$db = 'like';
$conn = mysql_connect($host, $user, $pass) or die(mysql_error());
mysql_select_db($db, $conn) or die(mysql_error());
?>Code: Select all
<?php
include('db.php');
if($_POST['postid'] != '' && $_POST['type'] != ''){
$alreadyExist = mysql_num_rows(mysql_query(' SELECT id FROM voted WHERE postid="'.(int)$_POST['postid'].'" AND ip="'.$_SERVER['REMOTE_ADDR'].'"'));
if($alreadyExist==0){
if($_POST['type']=='like'){
mysql_query(' UPDATE posts SET `like`=`like`+1 WHERE id="'.(int)$_POST['postid'].'"');
$num = mysql_fetch_row(mysql_query(' SELECT `like` FROM posts WHERE id="'.(int)$_POST['postid'].'" LIMIT 1'));
}elseif($_POST['type']=='unlike'){
mysql_query(' UPDATE posts SET `unlike`=`unlike`+1 WHERE id="'.(int)$_POST['postid'].'"');
$num = mysql_fetch_row(mysql_query(' SELECT `unlike` FROM posts WHERE id="'.(int)$_POST['postid'].'" LIMIT 1'));
}
echo $num[0];
mysql_query(' INSERT INTO voted (`postid`,`ip`) VALUES ("'.(int)$_POST['postid'].'","'.$_SERVER['REMOTE_ADDR'].'")');
}else{
echo 'You already voted this.';
}
}
?>but in my joomla page, it only previews the like and unlike button, i am unable to press it.
may i ask why ?
