How can PHP documentation be effectively utilized to troubleshoot coding issues and find relevant functions?

Issue: To troubleshoot coding issues and find relevant functions in PHP, utilizing the PHP documentation is crucial. The PHP documentation provides detailed explanations of functions, parameters, return values, and examples, making it easier to understand how to use a particular function or troubleshoot coding problems. Code snippet:

// Example of using the PHP documentation to find relevant functions
$number = 5;
$factorial = gmp_fact($number); // Using the gmp_fact function to calculate the factorial of a number
echo "Factorial of $number is: $factorial";