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Passing variables between pages

Posted on 2004-09-21
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Last Modified: 2008-03-17
Hi,
I am using the code below to display a table on a page with some information for a helpdesk. I want the user to have the ability to look at more detailed information on the incident by clicking the incident number. The link to the other page works using the code :
              echo '<td> <a href="details.php">'.$row['incidentno'].'</a></td>';   (for full code listing see below)

This link works but on the 'details.php' page I only want to show details of the incident selected by the user. I know that I need to pass a variable to the other page but how?

PHP code used on page:

<?php
  mysql_connect("localhost", "administrator", "password");
  echo '<table width="85%" border="1">';

echo '<tr><th>Incident Number</th><th>Type</th><th>Decription</th><th>Date</th><th>Engineer</th></tr>';  

$sql="SELECT incidentno, type, shortdesc, date, engineer FROM helpdesk.incidents WHERE status = 'Open'";
$result=mysql_query($sql);

if(mysql_num_rows($result)>0)
{
 
  while($row=mysql_fetch_assoc($result))  
  {
        
    echo '<tr>';
    echo '<td> <a href="details.php">'.$row['incidentno'].'</a></td>';
    echo '<td>'.$row['type'].'</td>';
    echo '<td>'.$row['shortdesc'].'</td>';
    echo '<td>'.$row['date'].'</td>';
    echo '<td>'.$row['engineer'].'</td>';
    echo '</tr>';

  }
}
else
{
  echo '<tr><td colspan="200">no data retieved</td></tr>';  
}
echo '</table>';
?>
0
Comment
Question by:dm_mcelduff
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3 Comments
 
LVL 13

Accepted Solution

by:
cLFlaVA earned 500 total points
ID: 12117864

Make your while statement like this:

  while($row=mysql_fetch_assoc($result))  
  {
       
    echo '<tr>';
    echo '<td> <a href="details.php?id=' . $row['incidentno'] . '">'.$row['incidentno'].'</a></td>';
    echo '<td>'.$row['type'].'</td>';
    echo '<td>'.$row['shortdesc'].'</td>';
    echo '<td>'.$row['date'].'</td>';
    echo '<td>'.$row['engineer'].'</td>';
    echo '</tr>';

  }

Then, in your details.php page, use this code and SQL Statement:

# if the id is set in the url, use it, otherwise use 0
$ino = isset($_GET['id']) && is_numeric($_GET['id']) ? $_GET['id'] : 0;
$sql="SELECT incidentno, type, shortdesc, date, engineer FROM helpdesk.incidents WHERE incidentno = '" . $ino . "'";



Any more questions, feel free to ask...
0
 
LVL 4

Expert Comment

by:llcooljayce
ID: 12118815
You can pass variables in the URL by simply adhering to this format:

<a href="mypage.php?VariableName=$VariableValue">Link</a>

To add more than one variable to pass simply use the & symbol.  For example:

<a href="mypage.php?name=$username&birthday=$dob">Link</a>

You can pass as many variables as you need to.  To access the variable value in the following php page simply refer to it as the VariableName (as in my first example).  Or in my second example:

echo "Hello there ".$name." welcome to my new page!";

Hope this helps.  Cheers.

Jayce
0
 
LVL 2

Author Comment

by:dm_mcelduff
ID: 12125070
Cheers cLFlaVA that worked a treat :)
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