update html page real time

rohitb · August 22, 2013

i have 1 html page and 2 php files.. below are the codes

index.html

here user inputs the value in the text field of the form

<html>
<head>
<title>A BASIC HTML FORM</title>
</head>
<body>

<Form name ="form1" Method ="POST" Action ="callput.php">

<INPUT TYPE = "TEXT" VALUE ="Enter Nifty Spot Price" Name ="spotprice">
<INPUT TYPE = "Submit" Name = "Submit1" VALUE = "Next->">

</FORM>

</body>
</html>

callput.php

depending on the user input value we calculate and give the user 2 more text boxes to fill values

<?php
$spotPrice = 1.0 * $_POST['spotprice'];
if($spotPrice%100>=0 && $spotPrice%100<40){
            $callStrikePrice=floor($spotPrice/100)*100 + 100;
            $putStrikePrice=floor($spotPrice/100)*100 - 100;
        }else if($spotPrice%100 >=40 && $spotPrice%100<=60){
            $callStrikePrice=floor($spotPrice/100)*100 + 100;
            $putStrikePrice=floor($spotPrice/100)*100;
        }else{
            $callStrikePrice=floor($spotPrice/100)*100 + 200;
            $putStrikePrice=floor($spotPrice/100)*100;
        }
?>

<Form name ="form1" Method ="POST" Action ="trend.php">
You Entered Nifty SpotPrice as <input type="text" name="spot" style="border:none;width:40px;background-color:#000000;color:yellow;font-weight:bold;text-align:center" value="<?php echo $spotPrice?>"/><br><br>
Enter price for Nifty <input type="text" name="something" disabled="" style="border:none;width:40px;background-color:#000000;color:yellow;font-weight:bold;text-align:center" value="<?php echo $callStrikePrice?>"/> CE <input type="text" name="callRate" size="10"><br><br>
Enter price for Nifty <input type="text" name="something1" disabled="" style="border:none;width:40px;background-color:#000000;color:yellow;font-weight:bold;text-align:center" value="<?php echo $putStrikePrice?>"/> PE <input type="text" name="putRate" size="10">

<INPUT TYPE = "Submit" Name = "Submit1" VALUE = "Calculate Trend->">

</FORM>

trend.php

depending on what value user has entered we give him the final result

<?php
$spotPrice = 1.0 * $_POST['spot'];
echo"$spotPrice<br><br>";
$callStrikePrice = 1.0 * $callStrikePrice;
$callRate = 1.0 * $_POST['callRate'];
echo"$callRate<br><br>";
$putStrikePrice = 1.0 * $putStrikePrice;
$putRate = 1.0 * $_POST['putRate'];
echo"$putRate<br><br>";
$actualCallRate = ceil(100.0 * (((($callStrikePrice - $spotPrice) - ($callStrikePrice - ($callStrikePrice+$putStrikePrice)/2.0))/($callStrikePrice - $spotPrice)) + 1) * $callRate);
$actualPutRate = ceil(100.0 * (1 - (((($callStrikePrice+$putStrikePrice)/2.0 - $putStrikePrice) - ($spotPrice - $putStrikePrice))/($spotPrice - $putStrikePrice))) * $putRate);

$buyPercent = ceil(10000.0 * $actualCallRate/($actualCallRate + $actualPutRate));
$sellPercent =  ceil(10000.0 * $actualPutRate/($actualCallRate + $actualPutRate));

echo'The chances of Nifty Future going up is ' .$buyPercent/100.0.  ' % and going down is ' .$sellPercent/100.0. ' %';
if($buyPercent==$sellPercent){
            echo"<br/><h1 style='color:yellow'>TREND IS NEUTRAL</h1>";
        }else if($buyPercent>$sellPercent){
            echo"<br/><h1 style='color:green'>TREND IS UP</h1>";
        }else{
            echo"<br/><h1 style='color:red'>TREND IS DOWN</h1>";
        }
        
?>

the issue is im loading the pages individually ie first index.html then callput.php and then trend.php .. is it possible to get the outputs on same index.html

Edited August 22, 2013 by rohitb

HippoZoned · August 22, 2013

Yes you could make the form submit on the same page using action="<?php echo $_SERVER['PHP_SELF'];?>"

To display values dynamically it would be best to use either Javascript or even Ajax.. Google it.

Also to display and hide certain form elements you could use CSS combined with PHP to hide/show elements when certain conditions are met

Edited August 22, 2013 by HippoZoned

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