gistfile1.php

<?php

$basePrices = [
	"6,00 € /l" => ['price' => '6,00', 'volume' => '1', 'unit' => 'l'],
	"1.88 € / 100 g" => ['price' => '1.88', 'volume' => '100', 'unit' => 'g'],
	"1.15 € / 100 gr" => ['price' => '1.15', 'volume' => '100', 'unit' => 'gr'],
	"2.33 € / 1 kg" => ['price' => '2.33', 'volume' => '1', 'unit' => 'kg'],
	"2.33 € / kg" => ['price' => '2.33', 'volume' => '1', 'unit' => 'kg'],
	"0,70 € / 10St" => ['price' => '0,70', 'volume' => '10', 'unit' => 'St'],
	"2.49 € / Stück" => ['price' => '2.49', 'volume' => '1', 'unit' => 'Stück'],
	"8.6 € / 100 Gramm" => ['price' => '8.6', 'volume' => '100', 'unit' => 'Gramm'],
	"6,00 € /l" => ['price' => '6,00', 'volume' => '1', 'unit' => 'l'],
	"22.21 EUR / Liter" => ['price' => '22.21', 'volume' => '1', 'unit' => 'Liter'],
	"10,53 € / 1.000ml" => ['price' => '10,53', 'volume' => '1.000', 'unit' => 'ml'],
	"8,73 € / 1.000l" => ['price' => '8,73', 'volume' => '1.000', 'unit' => 'l'],
	"13,20 €" => ['price' => '13,20', 'volume' => '', 'unit' => ''],
	"91,33 €/L" => ['price' => '91,33', 'volume' => '1', 'unit' => 'L'],
	"6.39€/1l" => ['price' => '6.39', 'volume' => '1', 'unit' => 'l'],
	"15,33 € / 1l" => ['price' => '15,33', 'volume' => '1', 'unit' => 'l'],
];

function getBasePrice($str) {
	$result = [];
	if (preg_match("/(.*)\/(.*)/", $str, $matches)) {
        if (preg_match("/([\d,\.]+)/", $matches[1], $priceMatches)) {
            $result['price'] = trim($priceMatches[1]);
        }
        if (preg_match("/([\d,\.]+)\s*(.*)/", $matches[2], $volumeMatches)) {
            $result['volume'] = trim($volumeMatches[1]);
            $result['unit'] = trim($volumeMatches[2]);
        } else {
            $result['volume'] = '1';
            $result['unit'] = trim($matches[2]);
        }
    } else {
        if (preg_match("/([\d,\.]+)/", $str, $priceMatches)) {
            $result['price'] = trim($priceMatches[1]);
            $result['volume'] = '';
            $result['unit'] = '';
        }
    }

	return $result;
}

foreach ($basePrices as $basePriceStr => $result) {
	$basePrice = getBasePrice($basePriceStr);
	if (count($result) === 3
        && $basePrice['price'] === $result['price']
        && $basePrice['volume'] === $result['volume']
        && $basePrice['unit'] === $result['unit']) {
		echo chr(27) . "[42m", " OK ";
	} else {
		echo chr(27) . "[41m", "FAIL";
	}
	echo chr(27) . "[0m";
    echo " ", $basePriceStr . "\n";
}