How important is it to refer to the English documentation for PHP functions to fully understand their usage and capabilities?

It is crucial to refer to the English documentation for PHP functions to fully understand their usage and capabilities. The documentation provides detailed explanations of the parameters, return values, and examples of how to use the function correctly. Without consulting the documentation, developers may misuse functions, leading to errors or unexpected behavior in their code.

// Example of referring to the PHP documentation for the strtoupper function
$word = "hello";
$uppercase_word = strtoupper($word);
echo $uppercase_word;