How can PHP developers effectively debug and troubleshoot issues related to function execution and parameter passing in a multi-function setup like the one described in the forum thread?

To effectively debug and troubleshoot issues related to function execution and parameter passing in a multi-function setup, PHP developers can use tools like var_dump() or print_r() to inspect the values of variables and parameters at different stages of the code execution. They can also use error_reporting() to display any errors or warnings that may occur during the execution of the functions.

// Example code snippet demonstrating debugging techniques
function function1($param1) {
    // Debugging parameter passing
    var_dump($param1);

    // Function logic
    // ...
}

function function2($param2) {
    // Debugging function execution
    echo "Function 2 executed with parameter: " . $param2;

    // Function logic
    // ...
}

// Calling the functions
$param1 = "Value 1";
function1($param1);

$param2 = "Value 2";
function2($param2);