How can PHP code be stored in variables and executed in a generated file?

To store PHP code in variables and execute it in a generated file, you can use the `ob_start()` and `ob_get_clean()` functions to capture the output of the PHP code and store it in a variable. Then, you can use file handling functions like `file_put_contents()` to write the generated PHP code to a file.

<?php
ob_start();
// PHP code to be stored in a variable
echo "Hello, World!";
$php_code = ob_get_clean();

// Write the PHP code to a file
$file = 'generated_file.php';
file_put_contents($file, '<?php ' . $php_code);
?>