Viewing file:  Logarithms.php (3.17 KB) -rw-r--r--
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<?php
namespace PhpOffice\PhpSpreadsheet\Calculation\MathTrig;
use PhpOffice\PhpSpreadsheet\Calculation\ArrayEnabled;
use PhpOffice\PhpSpreadsheet\Calculation\Exception;
class Logarithms
{
use ArrayEnabled;
/**
* LOG_BASE.
*
* Returns the logarithm of a number to a specified base. The default base is 10.
*
* Excel Function:
* LOG(number[,base])
*
* @param mixed $number The positive real number for which you want the logarithm
* Or can be an array of values
* @param mixed $base The base of the logarithm. If base is omitted, it is assumed to be 10.
* Or can be an array of values
*
* @return array|float|string The result, or a string containing an error
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function withBase($number, $base = 10)
{
if (is_array($number) || is_array($base)) {
return self::evaluateArrayArguments([self::class, __FUNCTION__], $number, $base);
}
try {
$number = Helpers::validateNumericNullBool($number);
Helpers::validatePositive($number);
$base = Helpers::validateNumericNullBool($base);
Helpers::validatePositive($base);
} catch (Exception $e) {
return $e->getMessage();
}
return log($number, $base);
}
/**
* LOG10.
*
* Returns the result of builtin function log after validating args.
*
* @param mixed $number Should be numeric
* Or can be an array of values
*
* @return array|float|string Rounded number
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function base10($number)
{
if (is_array($number)) {
return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $number);
}
try {
$number = Helpers::validateNumericNullBool($number);
Helpers::validatePositive($number);
} catch (Exception $e) {
return $e->getMessage();
}
return log10($number);
}
/**
* LN.
*
* Returns the result of builtin function log after validating args.
*
* @param mixed $number Should be numeric
* Or can be an array of values
*
* @return array|float|string Rounded number
* If an array of numbers is passed as an argument, then the returned result will also be an array
* with the same dimensions
*/
public static function natural($number)
{
if (is_array($number)) {
return self::evaluateSingleArgumentArray([self::class, __FUNCTION__], $number);
}
try {
$number = Helpers::validateNumericNullBool($number);
Helpers::validatePositive($number);
} catch (Exception $e) {
return $e->getMessage();
}
return log($number);
}
}
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