How can one ensure that their PHP code is secure and follows best practices when displaying dynamic images?

To ensure that PHP code displaying dynamic images is secure and follows best practices, one should validate user input, sanitize data, and properly handle file uploads. This helps prevent vulnerabilities such as code injection or file execution exploits. 

<?php
// Validate and sanitize user input
$imageId = filter_input(INPUT_GET, 'image_id', FILTER_VALIDATE_INT);

if (!$imageId) {
    // Handle invalid input
    die('Invalid image ID');
}

// Retrieve image data from database
// $imageData = retrieveImageData($imageId);

// Output image with proper headers
header('Content-Type: image/jpeg');
// echo $imageData;
?>

Keywords

PHP security dynamic images validation input validation

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