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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
use PhpOffice\PhpSpreadsheet\Calculation\Information\ExcelError;
class Random
{
use ArrayEnabled;
/**
* RAND.
*
* @return float Random number
*/
public static function rand()
{
return mt_rand(0, 10000000) / 10000000;
}
/**
* RANDBETWEEN.
*
* @param mixed $min Minimal value
* Or can be an array of values
* @param mixed $max Maximal value
* Or can be an array of values
*
* @return array|float|int|string Random number
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function randBetween($min, $max)
{
if (is_array($min) || is_array($max)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $min, $max);
}
try {
$min = (int) Helpers::validateNumericNullBool($min);
$max = (int) Helpers::validateNumericNullBool($max);
Helpers::validateNotNegative($max - $min);
} catch (Exception $e) {
return $e->getMessage();
}
return mt_rand($min, $max);
}
/**
* RANDARRAY.
*
* Generates a list of sequential numbers in an array.
*
* Excel Function:
* RANDARRAY([rows],[columns],[start],[step])
*
* @param mixed $rows the number of rows to return, defaults to 1
* @param mixed $columns the number of columns to return, defaults to 1
* @param mixed $min the minimum number to be returned, defaults to 0
* @param mixed $max the maximum number to be returned, defaults to 1
* @param bool $wholeNumber the type of numbers to return:
* False - Decimal numbers to 15 decimal places. (default)
* True - Whole (integer) numbers
*
* @return array|string The resulting array, or a string containing an error
*/
public static function randArray($rows = 1, $columns = 1, $min = 0, $max = 1, $wholeNumber = false)
{
try {
$rows = (int) Helpers::validateNumericNullSubstitution($rows, 1);
Helpers::validatePositive($rows);
$columns = (int) Helpers::validateNumericNullSubstitution($columns, 1);
Helpers::validatePositive($columns);
$min = Helpers::validateNumericNullSubstitution($min, 1);
$max = Helpers::validateNumericNullSubstitution($max, 1);
if ($max <= $min) {
return ExcelError::VALUE();
}
} catch (Exception $e) {
return $e->getMessage();
}
return array_chunk(
array_map(
function () use ($min, $max, $wholeNumber) {
return $wholeNumber
? mt_rand((int) $min, (int) $max)
: (mt_rand() / mt_getrandmax()) * ($max - $min) + $min;
},
array_fill(0, $rows * $columns, $min)
),
max($columns, 1)
);
}
}
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