How can PHP developers prevent SQL injection vulnerabilities when updating database entries in a loop?

To prevent SQL injection vulnerabilities when updating database entries in a loop, PHP developers should use prepared statements with parameterized queries. By binding parameters to placeholders in the query, the database engine can distinguish between the SQL code and the data being passed, thus preventing malicious SQL injection attacks. 

// Assume $db is your database connection

// Sample loop to update database entries
foreach ($entries as $entry) {
    $stmt = $db->prepare("UPDATE table_name SET column_name = :value WHERE id = :id");
    $stmt->bindParam(':value', $entry['value']);
    $stmt->bindParam(':id', $entry['id']);
    $stmt->execute();
}

Keywords

PHP SQL injection database loop prepared statements

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