How can PHP developers securely handle user input in image gallery applications?

To securely handle user input in image gallery applications, PHP developers should always validate and sanitize user input to prevent SQL injection, XSS attacks, and other security vulnerabilities. This can be achieved by using PHP functions like htmlspecialchars() to sanitize user input before storing or displaying it in the application. 

// Sanitize user input before storing it in the database
$userInput = $_POST['user_input'];
$cleanInput = htmlspecialchars($userInput);

// Display sanitized user input in the application
echo $cleanInput;

Keywords

SQL injection input validation image uploading cross-site scripting image manipulation.

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