我有两个
JSON数组来自外部网站.我排序并合并两个数组,对它们进行解码,然后按ID从最高到最低排序.
目前,当单击“按字母顺序”选项时,将sort = alphabetical添加到URL的末尾,当页面重新加载完成后,JSON数组将再次被解码并合并.
这不是我想要的结果:我不希望JSON数组在单击该选项时再次被解码和合并 – 我只是希望已经解码和合并的JSON数组按字母顺序排序.
阵列:
$homepage = array(); $homepage[]= '{ "info":{ "collection":[ { "Name":"Charlie","ID":"7" },{ "Name":"Emma","ID":"9" } ] } }'; $homepage[] = '{ "info":{ "collection":[ { "Name":"Bob","ID":"5" } ] } }';
排序:
$data = array(); foreach ($homepage as $homepage2) { $tmp=json_decode($homepage2,false); $data = array_merge($data,$tmp->info->collection); } if(!empty($_GET['sort']) && $_GET['sort'] == 'alphabetical') { usort($data,function ($a,$b) { return strcmp($a->Name,$b->Name); }); }else{ usort($data,$b) { return $b->ID - $a->ID; }); } echo' <select onchange="location.href = this.value;"> <option value="example.PHP?sort=alphabetical">Alphabetical</option> </select> '; foreach($data as $key) { echo' <a href="test.com"> <p>'.$key->ID.'</p> <p>'.$key->Name.'</p> </a> '; }
解决方法
您可以使用JavaScript进行点击排序,并仅使用PHP将JSON传递给它.
在您提供了要显示列表的HTML结构之后,我更新了此答案,以便为这些字段的记录和p元素使用div元素.
我们可以通过两个按钮替换选择列表,用于选择排序顺序.
<?PHP $homepage = array(); $homepage[]= '{ "info":{ "collection":[ { "Name":"Charlie","ID":"13" },"ID":"10" } ] } }'; $data = array(); foreach ($homepage as $homepage2) { $tmp=json_decode($homepage2,$tmp->info->collection); } ?> <div id="container"></div> <button id="sort1">Alphabetical</button> <button id="sort2">High to Low</button> <script> var collection = <?=json_encode($data)?>; function populate(compareFunc) { collection.sort(compareFunc); var container = document.getElementById('container'); container.innerHTML = ''; collection.forEach(function (key) { var div = document.createElement("div"); div.className = "inventory"; var span = document.createElement("span"); span.textContent = key.ID; div.appendChild(span); span = document.createElement("span"); span.textContent = key.Name; div.appendChild(span); container.appendChild(div); }); } var populateById = populate.bind(null,function (a,b) { return a.ID - b.ID; }); var populateByName = populate.bind(null,b) { return a.Name.localeCompare(b.Name); }); document.getElementById("sort1").addEventListener('click',populateByName); document.getElementById("sort2").addEventListener('click',populateById); document.addEventListener('DOMContentLoaded',populateById); </script>
对于示例数据,这将导致以下JavaScript / HTML,您可以在这里测试:
var collection = [{"Name":"Charlie","ID":"13"},{"Name":"Emma","ID":"9"},{"Name":"Bob","ID":"10"}]; function populate(compareFunc) { collection.sort(compareFunc); var container = document.getElementById('container'); container.innerHTML = ''; collection.forEach(function (key) { var div = document.createElement("div"); div.className = "inventory"; var span = document.createElement("span"); span.textContent = key.ID; div.appendChild(span); span = document.createElement("span"); span.textContent = key.Name; div.appendChild(span); container.appendChild(div); }); } var populateById = populate.bind(null,b) { return a.ID - b.ID; }); var populateByName = populate.bind(null,b) { return a.Name.localeCompare(b.Name); }); document.getElementById("sort1").addEventListener('click',populateByName); document.getElementById("sort2").addEventListener('click',populateById); document.addEventListener('DOMContentLoaded',populateById);
span { margin-left: 5px } div.inventory { border-bottom: 1px solid gray }
<div id="container"></div> <button id="sort1">Alphabetical</button> <button id="sort2">High to Low</button>
请注意,我给出了三个不同于您的问题的ID值,因为否则排序顺序对于ID和Name都是相同的.
使用表:替代
有很好的JavaScript库可以提供更多的功能来表示数据集.这是一个使用jQuery与DataTables的例子:
var collection = [{"Name":"Charlie","ID":"5"}]; function populate() { var tbody = $('#collection>tbody'); collection.forEach(function (key) { var row = $('<tr>'); row.append($('<td>').text(key.ID)); row.append($('<td>').text(key.Name)); tbody.append(row); }); } $(document).ready(function(){ populate(); $('#collection').DataTable(); });
<script src="http://code.jquery.com/jquery-1.12.3.js"></script> <link rel="stylesheet" type="text/css" href="https://cdn.datatables.net/1.10.12/css/jquery.dataTables.min.css"> <script src="https://cdn.datatables.net/1.10.12/js/jquery.dataTables.min.js"></script> <table id="collection"> <thead> <tr><th>ID</th><th>Name</th></tr> </thead> <tbody/> </table>
实际的代码更小(不包括附带的库),而纯JavaScript解决方案将是一个基本的表.但是这样做有上下颠倒,过滤,分页,不错的风格…