ilMathPhpAdapter Class Reference

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V. More...

Inheritance diagram for ilMathPhpAdapter:

Collaboration diagram for ilMathPhpAdapter:

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

Private Member Functions
	transformToNumeric (?string $operand)

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)

Detailed Description

This file is part of ILIAS, a powerful learning management system published by ILIAS open source e-Learning e.V.

ILIAS is licensed with the GPL-3.0, see https://www.gnu.org/licenses/gpl-3.0.en.html You should have received a copy of said license along with the source code, too.

If this is not the case or you just want to try ILIAS, you'll find us at: https://www.ilias.de https://github.com/ILIAS-eLearning Class ilMathPhpAdapter

Author

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

Definition at line 23 of file class.ilMathPhpAdapter.php.

Member Function Documentation

add()

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

@inheritDoc

Implements ilMathAdapter.

Definition at line 45 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,
		?int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 154 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;
        }
 
        if ($left_operand > $right_operand) {
            return 1;
        }
 
        return -1;
    }

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

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div()

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

@inheritDoc

Implements ilMathAdapter.

Definition at line 91 of file class.ilMathPhpAdapter.php.

    {
        if ($right_operand == 0) {
            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 {
            $left_operand = $this->normalize($left_operand);
            $right_operand = $this->normalize($right_operand);
 
            $left_operand = $this->transformToNumeric($left_operand);
            $right_operand = $this->transformToNumeric($right_operand);
 
            $res = $left_operand / $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 Vendor\Package\$e, $res, ilMathBaseAdapter\applyScale(), ilMathBaseAdapter\normalize(), and transformToNumeric().

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mod()

ilMathPhpAdapter::mod	(		$left_operand,
			$right_operand
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 122 of file class.ilMathPhpAdapter.php.

                                                      : int
    {
        if ($right_operand == 0) {
            throw new ilMathDivisionByZeroException(sprintf("Division of %s by %s not possible!", $left_operand, $right_operand));
        }
 
        return $this->normalize($left_operand) % $this->normalize($right_operand);
    }

References ilMathBaseAdapter\normalize().

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mul()

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

@inheritDoc

Implements ilMathAdapter.

Definition at line 65 of file class.ilMathPhpAdapter.php.

    {
        try {
            $left_operand = $this->normalize($left_operand);
            $right_operand = $this->normalize($right_operand);
 
            $left_operand = $this->transformToNumeric($left_operand);
            $right_operand = $this->transformToNumeric($right_operand);
 
            $res = $left_operand * $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 Vendor\Package\$e, $res, ilMathBaseAdapter\applyScale(), ilMathBaseAdapter\normalize(), and transformToNumeric().

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pow()

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

@inheritDoc

Implements ilMathAdapter.

Definition at line 134 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,
		?int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 144 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,
		?int	$scale = null
	)

@inheritDoc

Implements ilMathAdapter.

Definition at line 55 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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transformToNumeric()

ilMathPhpAdapter::transformToNumeric ( ?string  $operand )

private

Parameters

string | null

$operand

Returns

float|int|string|null

Definition at line 29 of file class.ilMathPhpAdapter.php.

    {
        if (is_string($operand)) {
            if (strpos($operand, '.') !== false) {
                $operand = (float) $operand;
            } else {
                $operand = (int) $operand;
            }
        }
 
        return $operand;
    }

References ILIAS\Repository\int().

Referenced by div(), and mul().

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

• components/ILIAS/Math/classes/class.ilMathPhpAdapter.php