is_finite - PHP code example

PHP Function Is_Fin - How to Make Sure That a Number is Finite

When working with float numbers, it is important to make sure that the numbers are finite. This is because it helps to prevent errors, such as division by zero, and allows you to handle the numbers in a controlled way. This article will show you how to use the php function is_finite to check whether a number is finite or not.

The is_finite() function returns a Boolean value that indicates whether the value of the argument passed to the function is finite or not. It does this by checking the float value of the argument. If the value is not a finite number, it will return FALSE, else it will return TRUE.

This function is especially useful in cases where an expression might lead to a NaN value, such as in a division by zero expression. When this happens, the is_finite() function will help you to identify the problem and resolve it before it leads to a larger issue.

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is_finite example

    private static function colord_clamp_hue( $degrees ) {
        $degrees = is_finite( $degrees ) ? $degrees % 360 : 0;
        return $degrees > 0 ? $degrees : $degrees + 360;
    }

    /** * Converts a hue value to degrees from 0 to 360 inclusive. * * Direct port of colord's parseHue function. * * @link https://github.com/omgovich/colord/blob/3f859e03b0ca622eb15480f611371a0f15c9427f/src/helpers.ts#L40 Sourced from colord. * * @internal * * @since 6.3.0 * * @param float $value The hue value to parse. * @param string $unit The unit of the hue value. * @return float The parsed hue value. */

        if (null === $value) {
            return;
        }

        $types = (array) $constraint->type;

        foreach ($types as $type) {
            $type = strtolower($type);
            if (isset(self::VALIDATION_FUNCTIONS[$type]) && match ($type) {
                'finite-float' => \is_float($value) && is_finite($value),
                'finite-number' => \is_int($value) || \is_float($value) && is_finite($value),
                'number' => \is_int($value) || \is_float($value) && !is_nan($value),
                default => self::VALIDATION_FUNCTIONS[$type]($value),
            }) {
                return;
            }

            if ($value instanceof $type) {
                return;
            }
        }