PHP Functions Essential Reference

getrandmax

int getrandmax(void) 

Returns the maximum random number possible, as defined by the system’s RAND_MAX value.

Returns:

Maximum random value

Description:

getrandmax() returns the maximum value that rand() can produce. This function is basically a utility function, but can have application when manipulating numbers produced by rand().

This function cannot fail.

Version:

PHP 3, PHP 4

See also:

mt_getrandmax() 
mt_rand() 
mt_srand() 
rand() 
srand() 

Example:

Get the maximum value returnable by rand()

echo "Max value of rand() is: ", getrandmax();