Welcome to today's lesson on Standard Math Algorithms in PHP. Many software engineering problems require an understanding and application of standard math algorithms. They form the foundation of numerous complex real-life implementations. As a programmer, honing your skills in utilizing math algorithms with PHP equips you to tackle complex problems efficiently while boosting your confidence in handling data-intensive tasks. In this lesson, we will specifically explore the use of prime numbers, an essential concept within standard math algorithms.

Let's consider a simple use case — identifying if a number is prime or not. A prime number is a number greater than 1 that has no positive divisors other than 1 and itself. Here's a straightforward and effective way to check if a number $n is prime: we iterate from 2 to the square root of $n. If $n is divisible by any of these numbers, it's not a prime number. If $n is not divisible by any of the numbers in the range, then it's a prime number.

Here is how the solution will look in PHP:

Now that we've grasped the idea of handling math problems in PHP, let's proceed to practice exercises! This basic understanding of standard math algorithms can be a game-changer in solving multifaceted coding challenges. It's not just about applying a method to solve a problem but more about understanding the logic behind it that paves the way toward becoming a skilled programmer. Practicing math problems using PHP helps solidify your comprehension of logic and enhances your problem-solving skills in PHP programming.