How can PHP developers effectively troubleshoot and debug issues related to displaying graphics based on user input strings?

Issue: PHP developers can effectively troubleshoot and debug issues related to displaying graphics based on user input strings by sanitizing and validating the user input to prevent any malicious code injection. Additionally, they can use PHP's built-in image processing functions to manipulate and display graphics based on the sanitized user input. 

// Sanitize and validate user input
$user_input = $_POST['user_input'];
$sanitized_input = filter_var($user_input, FILTER_SANITIZE_STRING);

// Display graphic based on user input
$filename = 'images/' . $sanitized_input . '.jpg';
if (file_exists($filename)) {
    echo '<img src="' . $filename . '" alt="User Input Image">';
} else {
    echo 'Image not found.';
}

Keywords

PHP debugging graphics user input strings

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