php+js怎么跟php结合使用实现历史汇率查询？比如最近一月，或者最近一年？有免费汇率接口吗？

来源：蜘蛛抓取(WebSpider) 时间：2023-12-09 00:30 标签： php换算人民币计算器
html代码 Exchange Rate Calculator

Exchange Rate Calculator

Choose the currency and the amounts to get the exchange rate

css代码:root { --primary-color: #5fbaa7; } * { box-sizing: border-box; } body { background-color: #f4f4f4; font-family: Arial, Helvetica, sans-serif; display: flex; flex-direction: column; align-items: center; justify-content: center; height: 100vh; margin: 0; padding: 20px; } h1 { color: var(--primary-color); } p { text-align: center; } .btn { color: #fff; background: var(--primary-color); cursor: pointer; border-radius: 5px; font-size: 12px; padding: 5px 12px; } .money-img { width: 150px; } .currency { padding: 40px 0; display: flex; align-items: center; justify-content: space-between; } .currency select { padding: 10px 20px 10px 10px; -moz-appearance: none; -webkit-appearance: none; appearance: none; border: 1px solid #dedede; font-size: 16px; background: transparent; background-image: url('data:image/svg+xml;charset=US-ASCII,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20width%3D%2229 2.4%22%20height%3D%22292.4%22%3E%3Cpath%20fill%3D%22%20000002%22%20d%3D%22M287%2069.4a17.6%2017.6%200%200%200-13-5.4H18.4c-5%200-9.3%201.8-12.9%205.4A17.6%2017.6%200%200%200%200%2082.2c0%205%201.8%209.3%205.4%2012.9l128%20127.9c3.6%203.6%207.8%205.4%2012.8%205.4s9.2-1.8%2012.8-5.4L287%2095c3.5-3.5%205.4-7.8%205.4-12.8%200-5-1.9-9.2-5.5-12.8z%22%2F%3E%3C%2Fsvg%3E'); background-position: right 10px top 50%, 0, 0; background-size: 12px auto, 100%; background-repeat: no-repeat; } .currency input { border: 0; background: transparent; font-size: 30px; text-align: right; } .swap-rate-container { display: flex; align-items: center; justify-content: space-between; } .rate { color: var(--primary-color); font-size: 14px; padding: 0 10px; } select:focus, input:focus, button:focus { outline: 0; } @media (max-width: 600px) { .currency input { width: 200px; } } JavaScript代码 // 获取货币1对象 let currencyEl_one = document.getElementById("currency-one"); // 获取货币2对象 let currencyEl_two = document.getElementById("currency-two"); // 获取货币1对应的汇率对象 let amountEl_one = document.getElementById("amount-one"); // 获取货币2对应的汇率对象 let amountEl_two = document.getElementById("amount-two"); // 获取提示框对应的对象 let rateEl = document.getElementById("rate"); // 检查初始状态下 是否需要换算汇率 getData(); // 货币2发生变化时 触发的事件 currencyEl_two.onchange = getData; // 货币1发生变化时 触发的事件 currencyEl_one.onchange = getData; // 获取按钮 货币1和货币2是否都有值 let btn = document.getElementById("swap"); // 点击交换按钮时 触发的事件 btn.onclick = function() { // console.log("!!!"); let currency_one = currencyEl_one.value; let currency_two = currencyEl_two.value; // 定义临时变量 let temp = currency_one; // 交换货币1和货币2的value currencyEl_one.value = currency_two; currencyEl_two.value = temp; // 并且交换货币1和货币2对应的汇率 currency_one = currency_two; currency_two = temp; fetch(`https://api.exchangerate-api.com/v4/latest/${currency_one}`) .then(res => res.json()) .then(data => { const rate = data.rates[currency_two]; rateEl.innerText = `1 ${currency_one} = ${rate} ${currency_two}`; amountEl_two.value = (amountEl_one.value * rate).toFixed(2); }); }; // 得到汇率 function getData() { let currency_one = currencyEl_one.value; let currency_two = currencyEl_two.value; fetch(`https://api.exchangerate-api.com/v4/latest/${currency_one}`) .then(res => res.json()) .then(data => { const rate = data.rates[currency_two]; rateEl.innerText = `1 ${currency_one} = ${rate} ${currency_two}`; amountEl_two.value = (amountEl_one.value * rate).toFixed(2); }); } 运行效果
还是github上找的小玩意跟着模仿着敲的。首先看一下fetch，我也是学过ajax之后头一次见这玩意，然后就看着人家代码顺便上MDN看了一下。Fetch API 提供了一个 JavaScript 接口，用于访问和操纵 HTTP 管道的一些具体部分，例如请求和响应。它还提供了一个全局 fetch() 方法，该方法提供了一种简单，合理的方式来跨网络异步获取资源。反正这个东西好像就是比ajax要牛的东西？具体的还是MDN看一下文档吧MDN-fetch链接直接看最基本用法：fetch('http://example.com/movies.json') .then(response => response.json()) .then(data => console.log(data)); 可以log看一下返回的东西就差不多知道咋用了吧看一下汇率计算器直接上源码html代码

Exchange Rate Calculator

Choose the currency and the amounts to get the exchange rate

css代码* { margin: 0; padding: 0; box-sizing: border-box; } select:focus, input:focus, button:focus { outline: 0; } body { display: flex; flex-direction: column; justify-content: center; align-items: center; min-height: 100vh; background-color: #f4f4f4; } img { width: 150px; } h1 { margin: 22px 0; color: rgb(47, 186, 158); } .description { margin: 16px 0; } select { padding: 9px 5px 9px 9px; font-size: 16px; background: transparent; border: 1px #dedede solid; border-radius: 5px; } input { font-size: 30px; text-align: right; border: 0; background: transparent; } .flex { display: flex; align-items: center; justify-content: space-between; } .top { padding: 40px 0; } .swapBtn { padding: 5px 12px; background-color: rgb(47, 186, 158); color: #fff; border-radius: 5px; } .rate { color: rgb(47, 186, 158); font-size: 14px; padding: 0 10px; } .bottom { padding: 40px 0; } js代码var selectTb = document.querySelector('#choose-tb') var selectDb = document.querySelector('#choose-db') var inputTb = document.querySelector('#input-tb') var inputDb = document.querySelector('#input-db') var swapBtn = document.querySelector('.swapBtn') var rateData = document.querySelector('.rate') function calculate() { fetch('https://open.exchangerate-api.com/v6/latest') .then(res => res.json()) .then(data => { rate = data.rates[selectDb.value] / data.rates[selectTb.value] rateData.innerText = `1${selectTb.value}=${rate} * ${selectDb.value}` inputDb.value = (inputTb.value * rate).toFixed(2) }) } selectTb.addEventListener('change', calculate) selectDb.addEventListener('change', calculate) inputTb.addEventListener('input', calculate) inputDb.addEventListener('input', calculate) swapBtn.addEventListener('click', () => { var temp = selectDb.value selectDb.value = selectTb.value selectTb.value = temp calculate() }) calculate() API用的是人家原来项目上的，所以这个汇率八成不太符合实际吧。

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