PHP Number Formatting: Rounding Down to Two Decimal Places

Q: How do I round down a decimal number in PHP to two decimal places accurately?

A: To achieve this, you can utilize the following formula:

floor($number * 100) / 100

Let's break down the steps:

1. Multiply the number by 100: This effectively shifts the decimal point two places to the right. For example, 49.955 becomes 4995.5.
2. Apply the floor() function: The floor() function rounds the result down to the nearest whole number, discarding any fractional part. In our example, 4995.5 becomes 4995.
3. Divide by 100: This shifts the decimal point back to its original position, resulting in 49.95.

Example:

$number = 49.955;
echo floor($number * 100) / 100; // Outputs 49.95

This method ensures accurate rounding down to two decimal places, even for numbers smaller than 1.