Liking system, how do I fix it? - php

Question

I have the following script for showing posts and liking them, but if I like one post it likes all the posts on the page, I can't think of another way to do it, can anyone give me some advice?
<?php
if ($sort == 1){
$result = $conn->query("SELECT * FROM posts ORDER BY date DESC LIMIT 4 ");
}
elseif($sort == 2)
{
$result = $conn->query("SELECT * FROM posts WHERE date > NOW() - INTERVAL 24 HOUR ORDER BY likes DESC");
}
elseif($sort == 3)
{
$result = $conn->query("SELECT * FROM posts ORDER BY likes DESC");
}
if ($result->num_rows > 0) :
while($row = mysqli_fetch_assoc($result)) : ?>
<div class="card mb-4">
<img class="card-img-top" src="<?php echo $row['image1'] ?>" alt="Card image cap">
<div class="card-body">
<h2 class="card-title"><?php print title; ?></h2>
<p class="card-text"><?php print text; ?></p>
Read More →
</div>
<div class="card-footer text-muted">
Posted on <?php print $row['date'] ?> by
<?php print $row['author']; ?>
<?php
$id=$row['id'];
if($_POST['like']) {
$update = "UPDATE posts set `likes` = `likes`+1 where `id` ='$id'";
if ($conn->query($update) === TRUE) {
} else {
echo "Error updating record: " . $conn->error;
}
} ?>
<form action="" method="POST">
<button type = "submit" value = "like" name='like'style="font-size:24px"><?php echo $row['likes']; ?><i class="fa fa-thumbs-o-up"></i>
</form>
</div>
</div>
<?php endwhile; endif; ?>

Answer 1

Your while loop contains the update query so your code should be change like this.
in order to get the id to like you just need to use a hidden field to post that id like in this code
<?php
if($_POST['like']) {
$id=$POST['id'];
$update = "UPDATE posts set `likes` = `likes`+1 where `id` ='$id'";
if ($conn->query($update) === TRUE) {
} else {
echo "Error updating record: " . $conn->error;
}
} ?>
<?php
if ($sort == 1){
$result = $conn->query("SELECT * FROM posts ORDER BY date DESC LIMIT 4 ");
}
elseif($sort == 2)
{
$result = $conn->query("SELECT * FROM posts WHERE date > NOW() - INTERVAL 24 HOUR ORDER BY likes DESC");
}
elseif($sort == 3)
{
$result = $conn->query("SELECT * FROM posts ORDER BY likes DESC");
}
if ($result->num_rows > 0) :
while($row = mysqli_fetch_assoc($result)) : ?>
<div class="card mb-4">
<img class="card-img-top" src="<?php echo $row['image1'] ?>" alt="Card image cap">
<div class="card-body">
<h2 class="card-title"><?php print title; ?></h2>
<p class="card-text"><?php print text; ?></p>
Read More →
</div>
<div class="card-footer text-muted">
Posted on <?php print $row['date'] ?> by
<?php print $row['author']; ?>
<form action="" method="POST">
<input name="id" type="hidden" value="<?php echo $row['id']; ?>">
<button type = "submit" value = "like" name='like'style="font-size:24px"><?php echo $row['likes']; ?><i class="fa fa-thumbs-o-up"></i>
</form>
</div>
</div>
<?php endwhile; endif; ?>