How can debugging be effectively utilized to troubleshoot issues with PHP functions like array_fill_keys?

When troubleshooting issues with PHP functions like array_fill_keys, debugging can be effectively utilized by using tools like var_dump() or print_r() to inspect the input parameters and return values of the function. This can help identify any unexpected values or errors that may be causing the function to behave incorrectly. Additionally, stepping through the code with a debugger can help pinpoint the exact line where the issue occurs and provide insights into the underlying problem.

// Debugging array_fill_keys function
$keys = ['a', 'b', 'c'];
$value = 'default';

// Check input parameters
var_dump($keys);
var_dump($value);

// Call array_fill_keys function
$result = array_fill_keys($keys, $value);

// Check return value
var_dump($result);