wc_decimal_to_fraction() │ WC 1.0

Convert a decimal (e.g. 3.5) to a fraction (e.g. 7/2). From: https://www.designedbyaturtle.co.uk/2015/converting-a-decimal-to-a-fraction-in-php/

No Hooks.

Return

Array|true|false. a 1/2 would be [1, 2] array (this can be imploded with '/' to form a string).

Usage

wc_decimal_to_fraction( $decimal );

$decimal(float) (required)

the decimal number.

wc_decimal_to_fraction() wc decimal to fraction code ^{WC 9.7.1}

function wc_decimal_to_fraction( $decimal ) {
	if ( 0 > $decimal || ! is_numeric( $decimal ) ) {
		// Negative digits need to be passed in as positive numbers and prefixed as negative once the response is imploded.
		return false;
	}

	if ( 0 === $decimal ) {
		return array( 0, 1 );
	}

	$tolerance   = 1.e-4;
	$numerator   = 1;
	$h2          = 0;
	$denominator = 0;
	$k2          = 1;
	$b           = 1 / $decimal;

	do {
		$b           = 1 / $b;
		$a           = floor( $b );
		$aux         = $numerator;
		$numerator   = $a * $numerator + $h2;
		$h2          = $aux;
		$aux         = $denominator;
		$denominator = $a * $denominator + $k2;
		$k2          = $aux;
		$b           = $b - $a;
	} while ( abs( $decimal - $numerator / $denominator ) > $decimal * $tolerance );

	return array( $numerator, $denominator );
}