What are the methods for rounding integers in PHP?

In PHP, there are several ways to round numbers, here are some commonly used methods:

1. ceil() rounds up to the nearest integer that is greater than or equal to the given value.
2. floor(): Round down and return the largest integer not greater than the given value.
3. round(): rounding the given value to the nearest integer.
4. intval(): Convert the given value to an integer type, disregarding the decimal part.
5. abs(): Take the absolute value, return the absolute value of the given value.

These methods can be chosen according to specific needs.