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<?php

/**
 * Split a md5 hash and make it a integer.
 */
function md5_to_int($md5)
{
    static $inc = 0;

    $inc++;

    $parts = str_split($md5, 2);

    $sum = $inc;
    foreach ($parts as $val) {
        // $sum += hexdec($val);
        $sum += intval($val);
    }

    return $sum;
}



/**
 * Create random integer within a range.
 */
function rand_int($min, $max)
{
    mt_srand(md5_to_int(KEY));
    return mt_rand($min, $max);
}



/**
 * Create random float within a range.
 */
function rand_float($min, $max, $precision)
{
    mt_srand(md5_to_int(KEY));
    $factor = pow(10, $precision);
    return mt_rand($min*$factor, $max*$factor) / $factor;
}



/**
 * Create random value from an array of values.
 */
function rand_array($array)
{
    mt_srand(md5_to_int(KEY));
    $len = count($array);
    $which = mt_rand(0, $len - 1);
    return $array[$which];
}