ZEND PHP 5 Certification STUDY GUIDE

160 ” Database Programming
While this example uses named placeholders—a named “template” variable preceeded
by a colon (:)—it is also possible to use question mark placeholders.
// Filter input from $_GET
$author1 = ’’;
if (ctype_alpha($_GET[’author1’]))
{
$author1 = $_GET[’author1’];
}
$author2 = ’’;
if (ctype_alpha($_GET[’author2’]))
{
$author2 = $_GET[’author2’];
}
// Set a named placeholder in the SQL statement for author
$sql = ’SELECT author.*, book.* FROM author
LEFT JOIN book ON author.id = book.author_id
WHERE author.last_name = :author’;
$stmt = $dbh->prepare($sql);
$stmt->setFetchMode(PDO::FETCH_OBJ);
// Fetch results for the first author
$stmt->bindParam(’:author’, $author1);
$stmt->execute();
$results = $stmt->fetchAll();
foreach ($results as $row)
{
echo "{$row->title}, {$row->last_name}\n";
}
// Fetch results for the second author
$stmt->bindParam(’:author’, $author2);
$stmt->execute();
Licensed to 482634 - Amber Barrow (itsadmin@deakin.edu.au)
$results = $stmt->fetchAll();
foreach ($results as $row)
{
echo "{$row->title}, {$row->last_name}\n";
}