What are the potential issues with the SQL syntax in the provided script?

The potential issue with the SQL syntax in the provided script is the lack of proper escaping of variables, which can lead to SQL injection vulnerabilities. To solve this issue, you should use prepared statements with parameterized queries to safely handle user input. 

// Potential fix for SQL syntax issue using prepared statements
$pdo = new PDO("mysql:host=localhost;dbname=myDB", 'username', 'password');

// Prepare a SQL statement
$stmt = $pdo->prepare("SELECT * FROM users WHERE username = :username");

// Bind the parameter
$stmt->bindParam(':username', $username);

// Execute the statement
$stmt->execute();

// Fetch the results
$results = $stmt->fetchAll();

Keywords

SQL syntax PHP script potential issues error types libraries

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