I just cant figure it out with what I know so far. See how you can select the little scissors and 'cut' out the listing and store it for print later. How could this be done with php?
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How do they do this? 1
- Thread starter pugs421
- Start date
Well presumably each ad is a record in a database with a unique ID.
Then when you click the scissors, the ad's id is stored within your session, or as a cookie on your machine.
So when you go to "My List" the server simply retrieves the records corresponding to the ads you have clipped by looking at your session/cookie and getting the relevant id numbers.
I am not sure of the exact way that this particular site works, but that's the general idea.
Then when you click the scissors, the ad's id is stored within your session, or as a cookie on your machine.
So when you go to "My List" the server simply retrieves the records corresponding to the ads you have clipped by looking at your session/cookie and getting the relevant id numbers.
I am not sure of the exact way that this particular site works, but that's the general idea.
- Thread starter
- #7
Foamcow, what you said at first is the path I was trying. So I have a form with a submit button in each listing. Each form in each listing contains a hidden field with the unique_id for each listing. But what should the action be for the form? I tried $SERVER['PHP_SELF'], but since this is already on the results page, wouldn't I have to resend all the information that was on the search page? Or is there a way to skip the code on the results page that retrieves the results, and only parse* the code that will store the unique_id's a session variables? Is there a way to have the user click the button and store the variable, without reloading the whole page?
*is parse the right word?
This is my first dynamic site so I might be missing a basic concept that I need when it comes to processing a form via $SERVER['PHP_SELF']. Here is the site I'm trying to do this for: I hope I was clear in my problem. Thanks.
*is parse the right word?
This is my first dynamic site so I might be missing a basic concept that I need when it comes to processing a form via $SERVER['PHP_SELF']. Here is the site I'm trying to do this for: I hope I was clear in my problem. Thanks.
Well, I wouldn't use a form for a start.
They are only using one as they are compiling this list with Javascript functions (I think... I am going out on a limb here)
Simply provide a link for each item that passes the id of that item to the same page its on. Then at the top of the page detect whether an id is being passed and append it to an array.
So you end up with an array that contains a number of ids.
Then when the user views the "my list" page, that array is used to generate the listing. I am guessing that this array should be a session variable so it has some persistance. PHP has some nice session handling functions that make life fairly easy in this respect.
To be honest, I am probably talking out of my arse here...
It's been a long, hard and hot day
and I don't think I would do it quite the same way if I sat down and thought about it for more than 5 minutes ;-)
They are only using one as they are compiling this list with Javascript functions (I think... I am going out on a limb here)
Simply provide a link for each item that passes the id of that item to the same page its on. Then at the top of the page detect whether an id is being passed and append it to an array.
So you end up with an array that contains a number of ids.
Then when the user views the "my list" page, that array is used to generate the listing. I am guessing that this array should be a session variable so it has some persistance. PHP has some nice session handling functions that make life fairly easy in this respect.
To be honest, I am probably talking out of my arse here...
It's been a long, hard and hot day
and I don't think I would do it quite the same way if I sat down and thought about it for more than 5 minutes ;-)
- Thread starter
- #9
Heres the javascript in the page:
Don't know much javascript, so can't tell you how it works...
function changeAction(){
if ( document.quickSearch.alias.selectedIndex < 0 )
{
alert( 'Please select a category from the list.' );
return false;
}
document.quickSearch.action='/c2/'+document.quickSearch.alias.options[document.quickSearch.alias.selectedIndex].value +'/results/index.xml';
return true;
}
Magic... not really. It'd be that easy to do with PHP or ASP too.
Don't know much javascript, so can't tell you how it works...
function changeAction(){
if ( document.quickSearch.alias.selectedIndex < 0 )
{
alert( 'Please select a category from the list.' );
return false;
}
document.quickSearch.action='/c2/'+document.quickSearch.alias.options[document.quickSearch.alias.selectedIndex].value +'/results/index.xml';
return true;
}
Magic... not really. It'd be that easy to do with PHP or ASP too.
Hi.. sorry it has taken me some time to get back to you.
Hmm, I know this should be easy, but the method I jsut tried does not work as I thought it would.
Now, I thought that this would append the value of the URL parameter to the array stored in $_SESSION['list'].
It does, but then when I try and append another value to the array it replaces the last one.
I expect that I have misunderstood how session variables work. I have used them before to handle a login thingy and didn't have any problem there.
As I understand it, a session variable should be available to the user/script throughout the "session" of that user's activity on the site.
So in my mind each time they click on one of the links in my test page, the corresponding value would get added to the list.
I'm going to try and spend some time on this tonight, hopefully i should get the answer as to why it doesnt work!
Hmm, I know this should be easy, but the method I jsut tried does not work as I thought it would.
Code:
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> Parameter Passing Test </title>
</head>
<body>
<?
// set up session var array if not existing
if (!isset($_SESSION['list'])){
$_SESSION['list']=array("item1","item2","item3","item4",); // fill the array with some test data to find where its going wrong
}
// append the value of the passed parameter into the array
$_SESSION['list'][]=$_GET['parameter'];
//Output the list
echo("<h2>Here is your list</h2><br>");
// access the array in the session Var and output the values stored in it
foreach($_SESSION['list'] as $key => $value){
echo($key." = ".$value."<br>\n");
}
?>
<hr>
<h2>Pick an item from here</h2><br>
<p>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Fishpaste">Fishpaste</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Handgrenade">Hangrenade</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Mobile Phone">Mobile Phone</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Shoelaces">Shoelace</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Rubber Duck">Rubber Duck</a><br>
</p>
</body>
</html>Now, I thought that this would append the value of the URL parameter to the array stored in $_SESSION['list'].
It does, but then when I try and append another value to the array it replaces the last one.
I expect that I have misunderstood how session variables work. I have used them before to handle a login thingy and didn't have any problem there.
As I understand it, a session variable should be available to the user/script throughout the "session" of that user's activity on the site.
So in my mind each time they click on one of the links in my test page, the corresponding value would get added to the list.
I'm going to try and spend some time on this tonight, hopefully i should get the answer as to why it doesnt work!
-
1
- #12
sleipnir214
Programmer
One general comment....
I don't see a session_start() anywhere in that code you just posted.
Want the best answers? Ask the best questions: TANSTAAFL!!
I don't see a session_start() anywhere in that code you just posted.
Want the best answers? Ask the best questions: TANSTAAFL!!
Oh you git ;-)
Yes.. it works now
Now I could have SWORN that I read that you don't need to use session_start() with $_SESSION.
LMAO... can't see the wood for the trees as they say
Thanks
Yes.. it works now
Code:
<? session_start(); ?>
<!doctype html public "-//W3C//DTD HTML 4.0 Transitional//EN">
<html>
<head>
<title> Parameter Passing Test </title>
</head>
<body>
<?
// set up session var array if not existing
if (!isset($_SESSION['list'])){
$_SESSION['list']=array("item1","item2","item3","item4",); // fill the array with some test data to find where its going wrong
}
// append the value of the passed parameter into the array
$_SESSION['list'][]=$_GET['parameter'];
//Output the list
echo("<h2>Here is your list</h2><br>");
// access the array in the session Var and output the values stored in it
foreach($_SESSION['list'] as $key => $value){
echo($key." = ".$value."<br>\n");
}
?>
<hr>
<h2>Pick an item from here</h2><br>
<p>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Fishpaste">Fishpaste</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Handgrenade">Hangrenade</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Mobile Phone">Mobile Phone</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Shoelaces">Shoelace</a><br>
<a href="<?=$_SERVER['PHP_SELF'];?>?parameter=Rubber Duck">Rubber Duck</a><br>
</p>
</body>
</html>Now I could have SWORN that I read that you don't need to use session_start() with $_SESSION.
LMAO... can't see the wood for the trees as they say
Thanks
sleipnir214
Programmer
You can use sessions without using session_start(). If an only if the PHP runtime configuration directive "session.auto_start" is set to either "1" or "yes". The default value is either "0" or "no".
I do not recommend changing this value -- why enable functionality you don't use?
If you're running PHP with Apache, you can change this value at a very discrete level -- you can set this value in httpd.conf or a .htaccess file.
Want the best answers? Ask the best questions: TANSTAAFL!!
I do not recommend changing this value -- why enable functionality you don't use?
If you're running PHP with Apache, you can change this value at a very discrete level -- you can set this value in httpd.conf or a .htaccess file.
Want the best answers? Ask the best questions: TANSTAAFL!!
- Thread starter
- #15
- Thread starter
- #16
I almost have it but how would I select from the database WHERE listing_id = an array? When the user wants to display their listings I have to select from the db all the listings for values stored in the session variable array. Or would the listings be retrieved a different way?
sleipnir214
Programmer
There are two ways I can think of off the top of my head.
Use each array element in a query in turn and aggregate the results.
Use the individual array values in a comma-separated list to be fetched. Something like MySQL's WHERE id in (<list of ids>).
Either way, you're going to have to loop across the array.
Want the best answers? Ask the best questions: TANSTAAFL!!
Use each array element in a query in turn and aggregate the results.
Use the individual array values in a comma-separated list to be fetched. Something like MySQL's WHERE id in (<list of ids>).
Either way, you're going to have to loop across the array.
Want the best answers? Ask the best questions: TANSTAAFL!!
- Thread starter
- #18
sleipnir214
Programmer
Uh, string concatenation?
Want the best answers? Ask the best questions: TANSTAAFL!!
Want the best answers? Ask the best questions: TANSTAAFL!!
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