PHP Functions Essential Reference

floor

int floor(float i) 

Truncates the given argument to the integer portion.

Returns:

Next-lowest integer from the given argument; FALSE on error

Description:

floor() is the opposite of ceil(). It rounds down a floating-point number to the next-lowest integer, no matter what the value of the floating-point number is.

Version:

PHP 3, PHP 4

See also:

ceil() 
round() 

Example:

Truncate a floating-point number

$number = 12.923; echo "The next smaller integer to $number is ", floor($number);