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POPassing values from client to server and back to client, asynchronously
 

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    <p>I've been trying to figure this problem out for quite a while. I know JavaScript is client side scripting and PHP is server-side scripting, but is it possible to pass a browsers epoch time into a PHP script to run some calculations then return geoJSON data based on the results; all asynchronously?</p> <p>The function I want to pass to the PHP script is something like:</p> <pre><code>function retreiveUTC() { var now = new Date().getTime(); var browserUTC = Math.floor(now)/1000.0; // this returns epoch time of the browser } </code></pre> <p>Then I would like to take the epoch time that is generated from the function and pass it to a php script to determine what JSON file to return.</p> <p>For example I will have the following files residing on the server:</p> <pre> 1352188536.JSON 1352187536.JSON 1352177536.JSON </pre> <p>And I want to retrieve the one that is closest to the browsers epoch results. Thank you in advance.</p> <p>Updated code below:</p> <p>not sure what I am doing wrong, but I am getting success from the ajax call but the return value is undefined.</p> <p>ajax stuff:</p> <pre><code> $.post ('timezone.php', { epochTime: browserUTC }, function (result) { //do someting to result }, "json"); var browserUTC = new Date().getTime(); $.post ('timezone.php', { epochTime: browserUTC }, function (result,status) { //display file name returned by PHP alert(result.file + "\n" + status); //console.log('test'); }); </code></pre> <p>PHP:</p> <pre><code> &lt;?php $epochTime = round($_POST['epochTime'] / 1000); $res= array(); $res['file'] = $epochTime . '.JSON'; return json_encode($res); ?&gt; </code></pre>
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