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<?php
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$rateFile = "exchangeRates.php";
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if (is_file($rateFile)) {
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$diff = (time() - filemtime($rateFile)) / 86400;
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echo "$rateFile last modified " . $diff . " days ago." . PHP_EOL;
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if ($diff < 0.9) {
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echo "Exiting - File too new." . PHP_EOL;
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exit(1);
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}
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}
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$str = '<?php' . PHP_EOL;
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$str .= 'function getExchangeRate($source, $target) {' . PHP_EOL;
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$str .= ' $currencyRates = array (' . PHP_EOL;
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/*
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$str .= retrieveRates("AUD");
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$str .= ','. PHP_EOL;
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$str .= retrieveRates("CAD");
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$str .= ','. PHP_EOL;
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$str .= retrieveRates("CNY");
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$str .= ','. PHP_EOL;
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$str .= retrieveRates("EUR");
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$str .= ','. PHP_EOL;
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$str .= retrieveRates("GBP");
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$str .= ','. PHP_EOL;
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$str .= retrieveRates("HKD");
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$str .= ','. PHP_EOL;
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$str .= retrieveRates("INR");
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$str .= ','. PHP_EOL;
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*/
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$str .= retrieveRates("USD");
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$str .= ' );' . PHP_EOL;
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$str .= '' . PHP_EOL;
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$str .= ' $rate = 1;' . PHP_EOL;
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$str .= '' . PHP_EOL;
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$str .= ' if (array_key_exists($source, $currencyRates)) {' . PHP_EOL;
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$str .= ' if (array_key_exists($target, $currencyRates[$source])) {' . PHP_EOL;
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$str .= ' $rate = $currencyRates[$source][$target];' . PHP_EOL;
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$str .= ' }' . PHP_EOL;
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$str .= ' }' . PHP_EOL;
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$str .= '' . PHP_EOL;
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$str .= ' return($rate);' . PHP_EOL;
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$str .= '}' . PHP_EOL;
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$str .= '?>' . PHP_EOL;
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if (is_file($rateFile)) {
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rename($rateFile, $rateFile . ".old");
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}
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file_put_contents($rateFile, $str);
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echo "$rateFile updated." . PHP_EOL;
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exit(0);
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function retrieveRates($source)
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{
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$accessKey = "9ca495b56281a691775f8b289e586f8f";
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$apiCall = "http://apilayer.net/api/live?access_key=" . $accessKey . "&source=";
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$json = file_get_contents($apiCall . $source);
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$json = json_decode($json);
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if ($json->success !== true) {
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echo "CurrencyLayer Error (" . $source . "): " . $json->error->code . " / " . $json->error->info . PHP_EOL;
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echo "Exiting." . PHP_EOL;
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exit(2);
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}
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$str = ' "' . $source . '" => array (' . PHP_EOL;
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foreach ($json->quotes as $symbol => $quote) {
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$str .= ' "' . substr($symbol, 3) . '" => ' . $quote . ',' . PHP_EOL;
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}
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$str .= ' )' . PHP_EOL;
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return ($str);
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}
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?>
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