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Math in PHP

  1. Count the Number of Characters in a String in PHP
    How to count the number of characters in a multi-byte string using PHP.
  2. PHP: How to Find Common Multiples
    Lean to find the common multiples between two numbers in PHP; the tutorial starts by teaching you about multiples, then moves on to common multiples.
  3. PHP: Check if Number is a Decimal Number
    This tutorial shows how to check if a number is a decimal number using the PHP floor function.
  4. PHP: Calculating Exponential Growth
    Why the caret character is not working in exponential growth calculations in PHP, and what to use instead.