PHP Sql Views counter using PDO prepare()

问题

I have a variable $id wich gives me the id of the current article and this can help me to make an update query in my database on current article.

This is my code:

 $vizualizari = $current_views+1;
    $sql1= "UPDATE detalii_cantari SET viz = viz WHERE id = {$id};";
$q1 = $dbh->prepare($sql1);
$q1->execute(array(':viz'=>$vizualizari));

I don't get any errors but my code still not working...

回答1:

Your correct code is here:

$vizualizari = $current_views+1;
    $sql1= "UPDATE detalii_cantari SET viz = :viz WHERE id = {$id}";
$q1 = $dbh->prepare($sql1);
$q1->execute(array(':viz'=>$vizualizari));

; from the end of sql is not needed here and viz = viz must become viz = :viz because of PDO.

回答2:

It seems you have to get rid of the previous query and make it in a single statement

$sql = "UPDATE detalii_cantari SET viz = viz + 1 WHERE id = ?";
$stm = $dbh->prepare($sql);
$stm->execute(array($id));

来源：https://stackoverflow.com/questions/19476351/php-sql-views-counter-using-pdo-prepare