How do you make dynamic urls?

what do you call "dynamic URLs" ?

urls with parameters ? urls generated on the fly ? how and why ?

blah.php?weeeeee=woooooo=that      

that kind

escape double quotes for the target=

sorry

simply do e.g.:

$name = "Steve"
echo("<a href='blah.php?name=".$name."'>click here</a>");

which will generate a link to:

blah.php?name=Steve

now in blah.php the following variable will become available:

$_GET['name']

which will contain "Steve"

regards

Okay, well say you had a MySQL table called "users" that looked like this:

+---------+-----------+-----------+-------------------+
| user_id | user_name | user_pass | user_email        |
+---------+-----------+-----------+-------------------+
|       1 | bork      | bork      | bork@blahblah.net |
|       2 | bink      | bink      | bink@bleeblee.net |
+---------+-----------+-----------+-------------------+

And you wanted to make a set of links that would go off to everyone's profile information or whatever:

-------------------------------------------------------------------
<?php

// Connect to MySQL
// Note: replace localhost, username, password, and database with your own values
mysql_connect('localhost', 'username', 'passsword') or die("Couldn't connect to MySQL!");
mysql_select_db('database') or die("Couldn't select database!");

// Get everything from the users table
$query = "select * from users";

// Query the database
$result = mysql_query($query) or die("Problem with the query: " . mysql_error());

// Loop through each row and make a URL for each row
while ($row = mysql_fetch_assoc($result)) {
    extract($row);
    echo("<a href=\"view_details.php?user_id=$user_id\">$user_name</a><br>\n");
}

// close database connection
mysql_close();
?>
----------------------------------------------------

Your code, once displayed, would look like this:

<a href="view_details.php?user_id=1">bork</a><br>
<a href="view_details.php?user_id=2">bink</a><br>

Then view_details.php would act based on the ID that was passed to it:

---------------------------------------------------------
<?php

// Connect to the database again
mysql_connect('localhost', 'username', 'passsword') or die("Couldn't connect to MySQL!");
mysql_select_db('database') or die("Couldn't select database!");

// Create variables for all the passed querystring information
extract($_GET);

// Get details for the specific user that was chosen
$query = "select * from users where user_id = $user_id";

// Query the database
$result = mysql_query($query) or die("Problem with the query: " . mysql_error());

// Grab the returned row
$row = mysql_fetch_assoc($result);
extract($row);

// Display results to the screen
echo "
<h2>User details</h2>
Username: $user_name<br>
E-mail: $user_email<br>
";

// Close database connection
mysql_close();
?>
---------------------------------------------------------

So for example, if you selected the first link, it would show you username bork and email address bork@blahblah.net.

Hope that helps...

blah.php?firstname=sam&lastname=spade&address=1950+Gough+st

The "?" is used to indicate the beginning of the GET arguments.
The "&" is used to separate the key=value pairs from each other
All the keys and values should be passed through urlencode() function to convert spaces, ampersands, equals signs, etc.

Try making a page called "blah.php" which contains the following code:
<?php print_r($_GLOBALS); ?>

Then access the page with the URL above.
you will see how the arguments in the URL are available to the PHP code, through the $_GET['firstname'] or $HTTP_GET_VARS['firstname'] variables, or through the $firstname variable, if register_globals is enabled.

ok, i'm gona try all these methods out, then i will come back and award the person who has given me the code that suits me best!

so i'll see you lot soon! cheers to everyone anyway!!!

i couldnt get any of them to work

oh

Try learning php first. Then we might get better responses and questions from you.

excuse-me, but if you copy-paste this very first "answer", it works... Comment from VGR  Date: 07/09/2003 05:43AM PDT  


<?php
//
// file blah.php
//

if (isset($_GET)) {
  if (isset($_GET['somevar'])) {
    echo "the variables receoved were : somevar={$_GET['somevar']} and otherone={$_GET['otherone']} <HR>";
  } // if CORRECT data received
} // if data received

$somevar="somewhere who told me this";
$theuri="blah.php?somevar=\"$somevar\"&otherone=3";
echo "<a href=\"$theuri\" target="_new">click here to go $somevar</A>";

?>