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POHow to retain the value of a variable after sucessive submission of form
 

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  1. POHow to retain the value of a variable after sucessive submission of form
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    <p>I am developing a Contextual Search Engine in php. For that when an user types a query, I need her latlong and time. I am developing the search box in php. To get latlong I am using HTML 5 geolocation api. I have written following two files by taking idea from posts in stackoverflow. </p> <p>order.php</p> <pre><code>&lt;html&gt; &lt;head&gt; &lt;script type="text/javascript"&gt; function getLocation(){ var x = document.getElementById("demo"); if (navigator.geolocation){ navigator.geolocation.getCurrentPosition(showPosition); } else { x.innerHTML="Geolocation is not supported by this browser."; } } function showPosition(position){ var latitude=document.getElementById("latitude"), longitude=document.getElementById("longitude"); latitude.value = position.coords.latitude; longitude.value = position.coords.longitude; } &lt;/script&gt; &lt;/head&gt; &lt;body onload="getLocation()"&gt; &lt;p id="demo"&gt;&lt;/p&gt; &lt;form id="searchbox" action="process.php" method="get"&gt; &lt;input name="q" type="text" placeholder="Type here"&gt; &lt;input name="latitude" id="latitude" type="hidden"&gt; &lt;input name="longitude" id="longitude" type="hidden"&gt; &lt;input id="submit" type="submit" value="Search"&gt; &lt;/form&gt; &lt;/body&gt;&lt;/html&gt; </code></pre> <p>Another file is process.php</p> <pre><code>&lt;html&gt; &lt;body&gt; &lt;form id="searchbox" action="process.php" method="post"&gt; &lt;input name="q" type="text" placeholder="Type here"&gt; &lt;input name="latitude" id="latitude" type="hidden" value="&lt;?php $latitude=$_POST['latitude']; echo $latitude; ?&gt;"&gt; &lt;input name="longitude" id="longitude" type="hidden" value="&lt;?php $longitude=$_POST['longitude'];echo $longitude; ?&gt;"&gt; &lt;input id="submit" type="submit" value="Search"&gt; &lt;/form&gt; &lt;?php $quantity=$_POST['quantity']; $date = date('Y-m-d H:i:s'); $arr=explode(" ",$date); $latitude=$_GET['latitude']; $longitude=$_GET['longitude']; echo "Latitude=". $latitude."Longitude=". $longitude." Time=".$arr[1]."&lt;br&gt;"; ?&gt; &lt;/body&gt; &lt;/html&gt; </code></pre> <p>The problem is that whenever I am submitting the form again from process.php the latitude and longitude values are getting reset. So how do I retain the value of them that I have got after landing on process.php so that they do not get reset even if I submit the form from process.php multiple times. </p> <p>In this context I have seen other similar questions asked here and applied their solutions but none of them seems to be working. So please help. Thank you.</p>
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    1. COCan you not attach the long/lat data values to your REQUEST headers? Then you would be able to access the values on the serverside
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    2. COSir, sorry I did not understand. I am new to php. I don't know what is REQUEST header. So could you please explain? Thank you.
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    3. COSee the answer SULEMAN and STEGREX has written below? that is what i mean, but i too lack php knowledge. It looks like STEGREX is the better of the two answers.
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