In what situations would it be more beneficial to refer to the PHP documentation for built-in functions rather than implementing custom functions from scratch?

In situations where you need to perform common tasks or operations that are already supported by PHP's built-in functions, it would be more beneficial to refer to the PHP documentation for those functions rather than implementing custom functions from scratch. This not only saves time and effort but also ensures that you are using efficient and tested solutions provided by the PHP language.

// Example: Using built-in PHP function to calculate the square root of a number
$number = 16;
$squareRoot = sqrt($number);
echo "Square root of $number is $squareRoot";