What are some PHP functions that can be used for number formatting and manipulation in mathematical operations?

When working with numbers in PHP, it is common to need to format them for display or manipulate them in mathematical operations. PHP provides several built-in functions for number formatting and manipulation, such as number_format(), round(), ceil(), floor(), and more. These functions can help you format numbers with a specific number of decimal places, round numbers to a certain precision, or perform mathematical operations like rounding up or down.

// Example of using PHP functions for number formatting and manipulation

// Number formatting
$number = 1234.56789;
$formatted_number = number_format($number, 2); // Output: 1,234.57

// Rounding
$rounded_number = round($number, 2); // Output: 1234.57

// Ceil (round up)
$ceiled_number = ceil($number); // Output: 1235

// Floor (round down)
$floored_number = floor($number); // Output: 1234