在PHP中使用array()处理多货币系统时，可以考虑以下策略：
$currencies = array(
'USD' => 1.0,
'EUR' => 0.85,
'GBP' => 0.75
);
function convertCurrency($amount, $fromCurrency, $toCurrency, $currencies) {
$exchangeRate = $currencies[$toCurrency] / $currencies[$fromCurrency];
return $amount * $exchangeRate;
}
$amount = 100;
$fromCurrency = 'USD';
$toCurrency = 'EUR';
$convertedAmount = convertCurrency($amount, $fromCurrency, $toCurrency, $currencies);
echo "Converted amount: $convertedAmount $toCurrency";
通过这些策略，可以在PHP中有效地处理多货币系统，并实现货币之间的转换和计算。
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