ilMathPhpAdapter Class Reference

Class ilMathPhpAdapter. More...

Inheritance diagram for ilMathPhpAdapter:

Collaboration diagram for ilMathPhpAdapter:

Public Member Functions
	add ($left_operand, $right_operand, $scale=null)
	{Adds two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	sub ($left_operand, $right_operand, $scale=null)
	{Subtracts two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	mul ($left_operand, $right_operand, $scale=null)
	{Multiplies two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	div ($left_operand, $right_operand, $scale=null)
	{Divides two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed Exceptions ilMathDivisionByZeroException } More...
	mod ($left_operand, $right_operand)
	{Gets modulus of two numbers. Parameters mixed $left_operand mixed $right_operand Returns mixed Exceptions ilMathDivisionByZeroException } More...
	pow ($left_operand, $right_operand, $scale=null)
	{Raises a number to another. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
	sqrt ($operand, $scale=null)
	{Gets the square root of a number. Parameters mixed $operand int $scale Returns mixed } More...
	comp ($left_operand, $right_operand, $scale=null)
	{Compares two numbers. Parameters mixed $left_operand mixed $right_operand int $scale Returns mixed } More...
Public Member Functions inherited from ilMathBaseAdapter
	applyScale ($number, $scale=null)
	This method adapts the behaviour of bcscale() More...
	round ($value, $precision=0)
	Parameters mixed $value int $precision Returns string More...
	equals ($left_operand, $right_operand, $scale=null)
	{Checks whether or not two numbers are identical. Parameters mixed $left_operand mixed $right_operand int $scale Returns bool } More...
	add ($left_operand, $right_operand, $scale=null)
	Adds two numbers. More...
	sub ($left_operand, $right_operand, $scale=null)
	Subtracts two numbers. More...
	mul ($left_operand, $right_operand, $scale=null)
	Multiplies two numbers. More...
	div ($left_operand, $right_operand, $scale=null)
	Divides two numbers. More...
	mod ($left_operand, $right_operand)
	Gets modulus of two numbers. More...
	pow ($left_operand, $right_operand, $scale=null)
	Raises a number to another. More...
	sqrt ($operand, $scale=null)
	Gets the square root of a number. More...
	comp ($left_operand, $right_operand, $scale=null)
	Compares two numbers. More...
	equals ($left_operand, $right_operand, $scale=null)
	Checks whether or not two numbers are identical. More...
	applyScale ($left_operand, $scale=null)
	round ($value, $precision=0)

Additional Inherited Members
Protected Member Functions inherited from ilMathBaseAdapter
	normalize ($number)
	This function fixes problems which occur when locale ist set to de_DE for example, because bc* function expecting strings. More...
	exp2dec ($float_str)
	Moved from ilMath... Converts numbers in the form "1.5e4" into decimal notation. More...

Detailed Description

Class ilMathPhpAdapter.

Author

Michael Jansen mjans.nosp@m.en@d.nosp@m.ataba.nosp@m.y.de

Definition at line 10 of file class.ilMathPhpAdapter.php.

Member Function Documentation

add()

ilMathPhpAdapter::add	(		$left_operand,
			$right_operand,
			$scale = null
	)

{Adds two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 15 of file class.ilMathPhpAdapter.php.

    {
        $res = $this->normalize($left_operand) + $this->normalize($right_operand);
 
        return $this->applyScale($res, $this->normalize($scale));
    }

References $res, ilMathBaseAdapter\applyScale(), and ilMathBaseAdapter\normalize().

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comp()

ilMathPhpAdapter::comp	(		$left_operand,
			$right_operand,
			$scale = null
	)

{Compares two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 116 of file class.ilMathPhpAdapter.php.

    {
        $left_operand  = $this->normalize($left_operand);
        $right_operand = $this->normalize($right_operand);
        $scale         = $this->normalize($scale);
 
        if (is_numeric($scale)) {
            $left_operand  = $this->applyScale($left_operand, $scale);
            $right_operand = $this->applyScale($right_operand, $scale);
        }
 
        if ($left_operand == $right_operand) {
            return 0;
        } elseif ($left_operand > $right_operand) {
            return 1;
        } else {
            return -1;
        }
    }

References ilMathBaseAdapter\applyScale(), and ilMathBaseAdapter\normalize().

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div()

ilMathPhpAdapter::div	(		$left_operand,
			$right_operand,
			$scale = null
	)

{Divides two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

Exceptions

ilMathDivisionByZeroException

}

Implements ilMathAdapter.

Definition at line 55 of file class.ilMathPhpAdapter.php.

    {
        if ($right_operand == 0) {
            require_once 'Services/Math/exceptions/class.ilMathDivisionByZeroException.php';
            throw new ilMathDivisionByZeroException(sprintf("Division of %s by %s not possible!", $left_operand, $right_operand));
        }
 
        // This ensures the old PHP <= 7.0.x behaviour, see: #27785 / #26361
        try {
            $res = $this->normalize($left_operand) / $this->normalize($right_operand);
 
            $division = $this->applyScale($res, $this->normalize($scale));
        } catch (Throwable $e) {
            if  (strpos($e->getMessage(), 'A non-numeric value encountered') !== false) {
                $division = 0;
            } else {
                throw $e;
            }
        }
 
        return $division;
    }

References $res, ilMathBaseAdapter\applyScale(), ilMathBaseAdapter\normalize(), and sprintf.

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mod()

ilMathPhpAdapter::mod	(		$left_operand,
			$right_operand
	)

{Gets modulus of two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand

Returns

mixed

Exceptions

ilMathDivisionByZeroException

}

Implements ilMathAdapter.

Definition at line 81 of file class.ilMathPhpAdapter.php.

    {
        if ($right_operand == 0) {
            require_once 'Services/Math/exceptions/class.ilMathDivisionByZeroException.php';
            throw new ilMathDivisionByZeroException(sprintf("Division of %s by %s not possible!", $left_operand, $right_operand));
        }
 
        $res = $this->normalize($left_operand) % $this->normalize($right_operand);
 
        return $res;
    }

References $res, ilMathBaseAdapter\normalize(), and sprintf.

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mul()

ilMathPhpAdapter::mul	(		$left_operand,
			$right_operand,
			$scale = null
	)

{Multiplies two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 35 of file class.ilMathPhpAdapter.php.

    {
        try {
            $res = $this->normalize($left_operand) * $this->normalize($right_operand);
 
            $multiplication = $this->applyScale($res, $this->normalize($scale));
        } catch (Throwable $e) {
            if (strpos($e->getMessage(), 'A non-numeric value encountered') !== false) {
                $multiplication = 0;
            } else {
                throw $e;
            }
        }
 
        return $multiplication;
    }

References $res, ilMathBaseAdapter\applyScale(), and ilMathBaseAdapter\normalize().

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pow()

ilMathPhpAdapter::pow	(		$left_operand,
			$right_operand,
			$scale = null
	)

{Raises a number to another.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 96 of file class.ilMathPhpAdapter.php.

    {
        $res = pow($this->normalize($left_operand), $this->normalize($right_operand));
 
        return $this->applyScale($res, $this->normalize($scale));
    }

References $res, ilMathBaseAdapter\applyScale(), ilMathBaseAdapter\normalize(), and pow().

Referenced by pow().

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sqrt()

ilMathPhpAdapter::sqrt	(		$operand,
			$scale = null
	)

{Gets the square root of a number.

Parameters

mixed	$operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 106 of file class.ilMathPhpAdapter.php.

    {
        $res = sqrt($this->normalize($operand));
 
        return $this->applyScale($res, $this->normalize($scale));
    }

References $res, ilMathBaseAdapter\applyScale(), ilMathBaseAdapter\normalize(), and sqrt().

Referenced by sqrt().

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sub()

ilMathPhpAdapter::sub	(		$left_operand,
			$right_operand,
			$scale = null
	)

{Subtracts two numbers.

Parameters

mixed	$left_operand
mixed	$right_operand
int	$scale

Returns

mixed

}

Implements ilMathAdapter.

Definition at line 25 of file class.ilMathPhpAdapter.php.

    {
        $res = $this->normalize($left_operand) - $this->normalize($right_operand);
 
        return $this->applyScale($res, $this->normalize($scale));
    }

References $res, ilMathBaseAdapter\applyScale(), and ilMathBaseAdapter\normalize().

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The documentation for this class was generated from the following file:

• Services/Math/classes/class.ilMathPhpAdapter.php