calling a php routine in the same page

jbond · April 17, 2008

Hi everyone,

I am trying to call a routine within the same program when a user fills out a form and hits the submit key. I am sure that this is feasible, but big question is on how to accomplish this

The form takes several inputs and should then be redirected to a routine that will eventually display the query results, but this within the same program, so I do not want to link the form to a call to an external php program . I think that I may have to use the extension

onclick=" ", but the big question then is how to call the php routine that does all the checking??

Below is the extract of the form that is being used..

<td colspan="4"><div align="center">PLEASE SELECT ONE OF THE ABOVE QUERY POSSIBILITIES </div></td>

</tr>

<tr>

</tr>

</table>

</form>

Thanks very much for your kind input

B rgds

blackcell · April 17, 2008

The thing you want is either ajax or an easier way of passing a variable and catching it on the reload to build your sql query off of the variable description. For instance:

<?php

if($_REQUEST['VIEW'] == "showall" || $_REQUEST['VIEW'] == "")$sqlQuery = "SELECT * FROM `table`";
if($_REQUEST['VIEW'] == "late")$sqlQuery = "SELECT * FROM `table` WHERE `Status` = 'Late'";

//Execute your query here.


?>
<a href='index.php?VIEW=showall'>Show Late</a>
<a href='index.php?VIEW=late'>Show Late</a>

I think this is where your going with this but if you want to display the results on the page without reloading you need ajax. If you want to just query out the user data you just entered and loading a page is not an issue just go to another page.

GingerRobot · April 17, 2008

Sounds like you need to look into some AJAX. The basic idea is that javascript makes a request to another php file 'behind the scenes' then updates the page with the output from that page.

I suggest you google for some AJAX tutorials to get you started.

blackcell · April 17, 2008

I would also recommend the xajax class if you need something fast and have minimal time for learning ajax.

jbond · April 17, 2008

thanks for all your input, the xajax class approach seems to be very interesting and easy to implement. I will have a go at this.

jbond · April 17, 2008

This is my first attempt with xajax.. however, it doesn't display the contents of var $container. Where am I going wrong??

Below is my test code ..

<?php require_once("xajax_core/xajax.inc.php");

?>

<?php

$xajax = new xajax();

$xajax->registerFunction("getdata");

function getdata($arg){

$container=$arg['container'];

echo $container;

}

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Untitled Document</title>

</head>

<body>

<p>container:

</p>

<p>

</p>

</form>

</body>

</html>

blackcell · April 18, 2008

Im not for sure but I think there is more you have to do int he php function you register with xajax(your getdata function) I haven't been able to straighten out the part on xajax when it comes to grabbing form data. I will continue to play and if you find the way to use form data with xajax please contact me! I will do the same.

jbond · April 18, 2008

Will do. It seems as if the routine is not called from the form. I inserted a small routine that writes the var contents to a file, but nothing appears in the file, which makes me believe the call to the function is ignored.

jbond · April 18, 2008

following code works for me (proof of concept). By putting the array elements into $_SESSION vars, I can use them in the main routine...

<?php require_once("xajax_core/xajax.inc.php");

?>

<?php

session_start();

$xajax = new xajax();

$xajax->registerFunction("getdata");

$xajax->processRequest();

function getdata($arg){

$container=$arg['container'];

$namis=$arg['namis'];

$_SESSION['cont']= $container;

$_SESSION['namis']=$namis;

}

?>

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<head>

<title>Untitled Document</title>

</head>

<body>

<?php

/*** print the javasript ***/

$xajax->printJavascript();

?>

<p>container:

</p>

<p>namis number

</p>

<p>

</p>

</form>

<?php

$show_cont=$_SESSION['cont'];

$show_namis=$_SESSION['namis'];

echo $show_cont . " " . $show_namis;

?>

</body>

</html>

blackcell · April 18, 2008

You invoke some class functions within your xajax defined function. I am not for sure about forms but:

<?php
function doAdd($a, $b)
{
   $response = new xajaxResponse();
   $response->assign('answer', 'innerHTML', $a + $b);
   $response->assign('reset', 'style.display', 'block');
   return $response;
}
?>

Is an example they use for working with forms on their site at http://xajaxproject.org/

Also, here is a function that I used and it had some interesting class functions that would work with your return data before returning it to the main script:

There are seven steps in which I have commented to explain. When returning something a an html object you have to tell your php function defined for xajax where it needs to go and invoke new xajaxResponse()', and then return that variable to like this: $objResponse->assign("elemID1","innerHTML", $foundThis); then return it like this: return $objResponse;

<?php
//1. Include the xajax class library:
require('xajax/xajax_core/xajax.inc.php');

//2. Instantiate the xajax object:
$xajax = new xajax();

//3. Register the names of the PHP functions you want to be able to call through xajax:
$xajax->registerFunction("checkThis1");
$xajax->registerFunction("checkThis2");
$xajax->registerFunction("randUpdate");

//4. Write the PHP functions you have registered and use the xajaxResponse object to return XML commands from them:
function checkThis1(){
   //Columns:
   //id
   //nameWhole
   //someNum
   $sqlQuery = "SELECT `someNum` FROM `xajax` WHERE `nameWhole` = 'Name'";
   $sqlResult = mysql_query( $sqlQuery );
   $rowCheck = mysql_fetch_assoc($sqlResult);
   $foundThis = $rowCheck["someNum"];

   // Instantiate the xajaxResponse object
   $objResponse = new xajaxResponse();

   // add a command to the response to assign the innerHTML attribute of
   // the element with id="SomeElementId" to whatever the new content is
   $objResponse->assign("elemID1","innerHTML", $foundThis);

   //Return the object
   return $objResponse;
}
//5. Before your script sends any output, have xajax handle any requests:
$xajax->processRequest();
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
   "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
   <title>xajax Testing</title>
   <?php $xajax->printJavascript("xajax/"); ?>
   <style type="text/css">
       a { text-decoration : none;
           color : #000000;
       }
       a:visited { text-decoration : none;
           color : #000000;
       }
       a:hover {
           color : #F5AE25;
           background : ;
       }
       .hdr { text-decoration : none;
           color : #ff0000;
       }
       .hdr:visited { text-decoration : none;
           color : #ff0000;
       }
       .hdr:hover {
           color : #F5AE25;
           background : #bb0000;
       }
       .hihiterow:hover {
           color : #F5AE25;
           background : #ffffff;
       }

</style>
<script type="text/javascript">
function initializeAll(){ //Creates a control for starting async stuff
   checkBoth();
   updateRand();
   //setTimeout('startNow()',1000);
}
function updateRand(){
   xajax_randUpdate();
   setTimeout('updateRand()',1000);
}
function checkBoth(){
   xajax_checkThis1();
   xajax_checkThis2();
   setTimeout('checkBoth()',1000);
}
</script>

</head>
<body style="font-family: arial; font-size: 14px;" onLoad="initializeAll()">

<!--7. Call the function from a JavaScript event or function in your application:-->

<big>My Number<br>
<div id="elemID1"></div></big>
<big>Somebody's number<br>
<div id="elemID2"></div></big>
<br><br>
<? echo date("h:m:s") . " <-The time stamp is not updating and is created once upon page loading. Monitor this and change the database value.  The number should change but the non-changing timestamp indicated the page is not reloading. AJAX in work.<br><br>";?>
</body>
</html>

I used this to test sending chat messages to different channels and retrieving each channel. I only included one of the xajax functions for one channel.

jbond · April 18, 2008

thank you for your input blackcell.. will have a look at the example you posted.

B rgds

blackcell · April 18, 2008

Crap I am sorry didn't look at the code I pasted close enough. The     before the code is garbage. You can disregard all of that crap.

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