Is there a specific PHP function or method that could be causing this security warning?

The security warning could be caused by using the `eval()` function in PHP, as it allows executing arbitrary code which can be a security risk. To solve this issue, avoid using `eval()` and instead find alternative ways to achieve the desired functionality, such as using built-in PHP functions or writing custom code.

// Avoid using eval() function
$code = "echo 'Hello, World!';";
eval($code); // This can be a security risk

// Use alternative ways to achieve the same functionality
echo 'Hello, World!'; // This is a safer approach