How can PHP functions stored in a MySQL table be properly executed when outputting a table cell?

When storing PHP functions in a MySQL table, they are typically stored as strings. To properly execute these functions when outputting a table cell, you can retrieve the stored function string from the database, use the `eval()` function to evaluate it as PHP code, and then echo the result within the table cell.

// Retrieve the stored PHP function from the MySQL table
$query = "SELECT function_string FROM functions_table WHERE id = 1";
$result = mysqli_query($connection, $query);
$row = mysqli_fetch_assoc($result);
$function_string = $row['function_string'];

// Evaluate the PHP function string using eval()
eval("\$result = $function_string;");

// Output the result within a table cell
echo "<td>" . $result . "</td>";