PHP Functions Essential Reference

mt_getrandmax

int mt_getrandmax(void) 

Returns the greatest value that can be returned by the mt_rand() function.

Returns:

Greatest random value that can be generated by the Mersenne Twister function

Description:

This function returns the maximum value that mt_rand() can return.

Version:

PHP 3 since 3.0.6, PHP 4

See also:

getrandmax() 
mt_rand() 
mt_srand() 
rand() 
srand() 

Example:

Get the maximum possible result from mt_rand()

echo "The largest value that mt_rand() can return with no arguments is ", mt_getrandmax();