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What are common pitfalls when displaying database links in PHP and how can they be resolved?

One common pitfall when displaying database links in PHP is not properly escaping the data retrieved from the database, which can lead to SQL injection attacks. To resolve this, use prepared statements with parameterized queries to safely display database links.

php 
// Retrieve database link safely using prepared statements
$stmt = $pdo->prepare("SELECT link FROM links_table WHERE id = :id");
$stmt->bindParam(':id', $id);
$stmt->execute();
$link = $stmt->fetch(PDO::FETCH_ASSOC);

// Display the link
echo '<a href="' . htmlspecialchars($link['link']) . '">Link</a>';

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