Use a function to insert 2 queries in mysql - php

Question

Currently I am trying to write a single function in my php script that adds a new page into my database and updates the navigation table at the same time. For some reason both queries are failing, and I'm not sure what else I should do.
This is my add_content function call:
elseif ($react == "add_content") {
echo 'add content';
$title = $_POST['title'];
$content = $_POST['content'];
$page = $_POST['page'];
if (!empty($title) && !empty($content) && !empty($page)) {
addcontent($title, $content, $page);
} else {
echo 'not enough info';
}
and this is my function:
function addcontent($title, $content, $page) {
global $db;
$query1 = "INSERT INTO `content`(`title`, `content`) VALUES (:title, :content)";
$query2 = "INSERT INTO `navigation` ('page', 'content_id') SELECT :page, c.content_id FROM content c WHERE title=:page;";
try {
$stat = $db->prepare($query1);
$stmt = $db->prepare($query2);
$stat->bindParam(':title', $title);
$stat->bindParam(':content', $content);
$stat->bindParam(':page', $page);
$stat->execute($query1);
$stmt->execute($query2);
$result = "<strong>$title</strong> added<p>";
} catch (Exception $ex) {
$result = "$title deltetion failed";
}
}
I know the two queries work because I've already tested them with dummy information, it's just getting them to work inside of this function that's causing the problem.
I'm not sure if this is needed, but just in case, this is my table to add content:
<form method="POST" action="index.php">
<input type="hidden" name="react" value="add_content">
<input type="hidden" name="page|title" value="admin">
<div align="center"><center><p>ADD A New Page<br>
Title: <input type="text" name="title|page" size="20"><br>
Content: <input type="text" name="content" size="20"><br>
<input type="submit" value="Submit"></p></center></div>
</form>

Answer 1

$query2 = "INSERT INTO `navigation` ('page', 'content_id')
SELECT :page, c.content_id FROM content c WHERE title=:page;";
^ column name marker
You can't use markers for column names. From the docs
The markers are legal only in certain places in SQL statements. For
example, they are allowed in the VALUES() list of an INSERT statement
(to specify column values for a row), or in a comparison with a column
in a WHERE clause to specify a comparison value. However, they are not
allowed for identifiers (such as table or column names), in the select
list that names the columns to be returned by a SELECT statement), or
to specify both operands of a binary operator such as the = equal
sign. The latter restriction is necessary because it would be
impossible to determine the parameter type. In general, parameters are
legal only in Data Manipulation Language (DML) statements, and not in
Data Definition Language (DDL) statements.
If you're trying to select the constant $page you can select c.title because your where condition guarantees that it will be equal to $page.
$query2 = "INSERT INTO `navigation` ('page', 'content_id')
SELECT c.title, c.content_id FROM content c WHERE title=:page;";
Also, you're binding $page to the wrong statement
$stat->bindParam(':page', $page);
Change it to
$stmt->bindParam(':page', $page);
^