What are some potential pitfalls to be aware of when using PHP to draw graphs?

One potential pitfall when using PHP to draw graphs is not properly sanitizing user input, which can lead to security vulnerabilities such as SQL injection or cross-site scripting attacks. To prevent this, always validate and sanitize user input before using it to generate graphs. 

// Sanitize user input before using it to draw graphs
$user_input = $_POST['input'];
$sanitized_input = filter_var($user_input, FILTER_SANITIZE_STRING);

Keywords

GD library memory usage data validation image rendering charting libraries

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