PDO update two tables at once - php

Question

I am trying to update two tables at once when form is submited.
http://pastebin.com/ctmaWWN8
Beside updating the article_cat table, I also need to update article_posts table.
In article_posts table I need to set cat to what ever I have typed in the form.
UPDATE article_posts SET cat=:cat WHERE cat=:cat
Something like that I guess, but I don't know how to combine them together!
Here is my PHP code:
if (isset($_POST['submit'])) {
$cat = $_POST['cat'];
$name = $_POST['name'];
$sqlInsert = 'UPDATE article_cat SET cat=:cat, name=:name WHERE id=:id';
$preparedStatement = $db->prepare($sqlInsert);
$preparedStatement->execute(array(':cat' => $cat, ':name' => $name, ':id' => $id));
if (empty($name)) {
// do something
echo'<div class="alert-box error"><span>error: </span>Categorys name field is Empty!</div>';
}
elseif (empty($cat)) {
echo'<div class="alert-box error"><span>error: </span>Categorys short name field is Empty!</div>';
}
else {
if ($preparedStatement->execute())
{
echo'<div class="alert-box success"><span>success: </span>Category Updated!</div>';
}
// If execution failed then ->
else
{
echo'<div class="alert-box error"><span>error: </span>Something went wrong while updating Category :/ ! Please try again.</div>';
}
}
}

Answer 1

Your code should become this and make sure you replace placeholder values in the second statement.
if (isset($_POST['submit'])) {
$cat = $_POST['cat'];
$name = $_POST['name'];
// first
$sqlInsert = 'UPDATE article_cat SET cat=:cat, name=:name WHERE id=:id';
$preparedStatement = $db->prepare($sqlInsert);
// second
$sqlInsert = 'UPDATE article_posts SET cat=:cat WHERE cat = :_cat';
$preparedStatement->execute(array(':cat' => $cat, ':name' => $name, ':id' => $id));
$preparedStatement->closeCursor();
if (empty($name)) {
echo'<div class="alert-box error"><span>error: </span>Categorys name field is Empty!</div>';
} elseif (empty($cat)) {
echo'<div class="alert-box error"><span>error: </span>Categorys short name field is Empty!</div>';
} else {
// second
$preparedStatement = $db->prepare($sqlInsert);
// second query statement
if ($preparedStatement->execute(array(':cat' => 'set-your-cat', ':_cat' => 'where-clause'))) {
$preparedStatement->closeCursor();
echo'<div class="alert-box success"><span>success: </span>Category Updated!</div>';
} else {
echo'<div class="alert-box error"><span>error: </span>Something went wrong while updating Category :/ ! Please try again.</div>';
}
}
}