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<?php
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<?php
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// PHP library for CurrencyLayer
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// PHP library for CurrencyLayer
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// (C) 2017 ViaThinkSoft, Daniel Marschall
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// (C) 2017-2022 ViaThinkSoft, Daniel Marschall
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// Revision: 2017-03-25
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// Revision: 2022-08-06
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//
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//
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// More information at https://currencylayer.com/documentation
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// More information at https://currencylayer.com/documentation
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# EXAMPLE
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# EXAMPLE
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/*
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/*
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                $this->check_json_file_exists();
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                $this->check_json_file_exists();
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                $data = json_decode(file_get_contents($this->jsonfile), true);
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                $data = json_decode(file_get_contents($this->jsonfile), true);
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                $this->check_data_ok($data);
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                $this->check_data_ok($data);
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                $exchange_rates_ary = array();
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                $exchange_rates_ary = array();
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                $source = $data['source'];
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                $quotes = $data['quotes'];
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                $quotes = $data['quotes'];
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                $quotes['USDUSD'] = 1; // missing 06 Aug 2022. A bug?? Reported https://github.com/apilayer/currencylayer-API/issues/16
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                foreach ($quotes as $n => $v) {
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                foreach ($quotes as $n => $v) {
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                        if ($source == substr($n, 0, 3)) {
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                        $exchange_rates_ary[substr($n, 3, 3)] = $v; // key: USDxxx=12.345
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                                $exchange_rates_ary[substr($n, 3, 3)] = $v; // key: USDxxx=12.345
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                }
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                        }
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                }
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                unset($quotes);
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                unset($quotes);
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                asort($exchange_rates_ary);
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                $this->cache_exchange_rates_ary = $exchange_rates_ary;
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                $this->cache_exchange_rates_ary = $exchange_rates_ary;
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                return $exchange_rates_ary;
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                return $exchange_rates_ary;
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        }
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        }
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        public function get_supported_currencies() {
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        public function get_supported_currencies() {
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                if ($from_cur == $to_cur) return $value;
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                if ($from_cur == $to_cur) return $value;
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                $exchange_rates_ary = $this->get_exchange_rates_ary();
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                $exchange_rates_ary = $this->get_exchange_rates_ary();
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                if (!isset($exchange_rates_ary[$from_cur])) throw new CurCalcException('Source curreny $from_cur not found in exchange data.');
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                if (!isset($exchange_rates_ary[$from_cur])) throw new CurCalcException("Source curreny $from_cur not found in exchange data.");
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                if (!isset($exchange_rates_ary[$to_cur])) throw new CurCalcException('Destination curreny $to_cur not found in exchange data.');
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                if (!isset($exchange_rates_ary[$to_cur])) throw new CurCalcException("Destination curreny $to_cur not found in exchange data.");
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                return $value * $exchange_rates_ary[$to_cur]/$exchange_rates_ary[$from_cur];
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                return $value * $exchange_rates_ary[$to_cur]/$exchange_rates_ary[$from_cur];
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        }
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        }
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}
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}