Question

I’ve made a ‘like’ button for my product pages with this code:

<?php
if('POST' == $_SERVER['REQUEST_METHOD']) {
$sql = "UPDATE table set `likes` = `likes`+1 where `product_id` = '1'";
$result=mysql_query($sql);
}
?>

<form action="<?php echo $_SERVER['PHP_SELF']?>" method="POST">
<input type = "submit" value = "like"/>
</form>

Works like a charm excpet for one minor problem being that every visit to the page registers a ‘like’.

Could someone help explain what i need to chnage/add in order that new ‘likes’ are only registered when the actual form is submitted?

Thanks
Dan

Answer 1

<?php
if($_POST['like']) {
$sql = "UPDATE table set `likes` = `likes`+1 where `product_id` = '1'";
$result=mysql_query($sql);
}
?>

<form action="<?php echo $_SERVER['PHP_SELF']?>" method="POST">
<input type = "submit" value = "like" name='like'/>
</form>

This should work 😉