How important is it to refer to the PHP manual for functions related to number formatting and manipulation?

It is crucial to refer to the PHP manual for functions related to number formatting and manipulation because it ensures that you are using the correct functions and syntax to achieve the desired results. The PHP manual provides detailed explanations, examples, and parameters for each function, helping you avoid errors and inconsistencies in your code.

// Example code snippet using number_format function for number formatting
$number = 1234.56;
$formatted_number = number_format($number, 2); // Outputs: 1,234.56
echo $formatted_number;