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phpurloptimizationusing

Using URL With Variables to Effect Code

I was wondering how you use ? (question marks) in your website to make it do different stuff based on the variable in the url. like: http://example.com/php/learn/kinder.php?level=$level like what's that called, and how do you use it? I assume with a switch statement This is my code at the momment:

<php
$con=mysqli_connect("host","username","pass","db");
  //Check connection
 if (mysqli_connect_errno())
   {
   echo "Failed to connect to MySQL: " . mysqli_connect_error();
   }

$level = mysqli_query($con,"SELECT gradek FROM profiles");
?>
<html>
<head>
<title> Redirecting </title>

<meta http-equiv="refresh" content="1; url=http://teachertechtutor.com/php/learn/kinder.php?level=$level> 
</head>
<body>
</body>
</html>

Then i'd have a switch... I know it's pointless. I just want to know for future reference.

So my question is: how to redirect using php variable in html How to use the ? to change the code.

I used bolli's code and this is what appears in the web page:

`<meta http-equiv="refresh" content="1; url=http://teachertechtutor.com/php/learn/kinder.php?level2=> </head> <body> </body> </html>

And it still doesn't redirect correctly

Solution

  • In kinder.php place:

    $level = $_REQUEST['level'];
echo $level;

    And read about POST and GET request. http://www.tizag.com/phpT/postget.php

    Or do you mean how to place the variable in the URL?

    Either do

     <meta http-equiv="refresh" content="1; url=http://teachertechtutor.com/php/learn/kinder.php?level=<?php echo $level;?>>

    or

    echo "<meta http-equiv="refresh" content="1; url=http://teachertechtutor.com/php/learn/kinder.php?level=".$level;

    EDIT / UPDATE

    Are you trying to get the variable and based on it, switch the page content?

    You could do something like this?

    <?php

//you could load header here
//include 'header.php';

/*
*Load content based on $_get parameter
*/

    // Get the $variable from the url after the level=
$page = (isset($_GET['level'])) ? $_GET['level'] : 'index';

//Check to see if the file exist
if (!file_exists($page . '.php'))
{
//echo "File does not exist" . $page;
}

switch ($page)
{
case 'test':
include('test.php');
break;

case 'test2':
include('test2.php');
break;

case 'test3':
include('test3.php');
break;

//Defualt start page
default:
include('index.php');

}

// You could load footer here
//include 'footer.php';
?>