I'm kind of a noob at this stuff.
But I've been browsing around and I see sites that are kind alike this
www.store.com/product.php?id=123
this is really cool. but How do I do it?
Im stuck using something like this
www.store.com/product/product123.php
If you could tell me how I can go about do this it would be awesome!
What you're looking at is a $_GET argument.
In your PHP code, try writing something like this:
$value = $_GET['foo'];
Then open your page like this:
hello.php?foo=123
This will set $value to 123.
You need to use the $_GET here.
if you use the following:
?id=123
then this will be how to use it and the result
$_GET['id'] (returns the 123)
You can use as many $_GET arguments as you need, for example:
?id=123&foo=bar&type=product
$_GET is an array of what parameters are in the url, so you use it the same way as an array.
Create a file called product.php with this code:
<?php
echo "The argument you passed was: " . $_GET['id'];
?>
Now run this URL in your browser:
http://<yourdomain>/product.php?id=123
and you will understand how $_GET works.
Those are called URL parameters (what they're contained in is called a query string), and they're not unique to PHP but can be accessed in PHP using the $_GET superglobal.
Similarly, you can get POST parameters using the $_POST superglobal, though in POST requests, these parameters are not appended to the URL.
Note: Generally, for usability purposes (and thus also SEO purposes), you want to avoid using query strings as much as possible. These days, the standard practice is to use URL rewriting to display friendly URLs to the user. So your application might accept a URL like:
/products.php?id=32
But the user only sees:
/product/32
You can do this by using mod_rewrite or similar URL rewriting capabilities to turn the friendly URL into the former query string URL internally, without having the user type out the query string.
You might want to have a look at the documentation at www.php.net, especially these pages: http://www.php.net/manual/en/reserved.variables.php
Specifically, have a look at $_GET and $_POST, which are two frequently used ways to transmit information from a browser to the server. (In short, GET-parameters are specified in the URL, as in your question, while POST-parameters are "hidden from view", but can contain more data - typically the contents of forms etc, such as the textbox you posted your question in).
Related
I have a URL with a query param like: www.example.com?src=%27};alert(1);a={%27%27:%27. I want to clean up the URL when the request gets made and return it to the browser without the javascript alert evaluating. By "clean up" I mean: remove html tags, invalid characters, and characters that can potentially evaluate in the user's browser.
This is what I'm thinking and please correct me if I'm thinking about this incorrectly: when the request is made, catch it in the middleware and then send back a cleaned up version of the query params (maybe redirect the user).
I'm not sure if PHP supports this? I thought I could override the query params in $_GET and assign the src param with the cleaned up value but that doesn't seem to be working. I've also tried overriding $_SERVER['QUERY_STRING'] but that also doesn't work.
What's the best way to handle something like this in PHP?
I'm using Zend Framework and it has a controller formatted to be accessed like this: url/search/Steve where Steve is a $_GET variable(name=keyword). It parses it correctly.
Now, the big question is: how can I have an url like that after the form is submitted? Instead of having ?keyword=Steve.
Thanks
have a look at the getParam method for Zend_Controller_Request
Something like this...
$var = Zend_Controller_Request::getParam('keyword');
$url = 'url/search'.$var;
If you var_dump($var) in between the two lines of code above you can test what values your application is returning.
This is all part of Zends Request object
Remember you can still use the $_GET superglobal with zend so the above becomes
$var=$_GET['keyword'];
$url = 'url/search'.$var;
I'm unsure of what you really want to have done.
If you have forms then what you should do in your case is to put method="POST" so that the fields don't end up in the URL at all in your case.
Or you need to do some JavaScript trickery to change the action="" of the form whenever the field you mention is changed. However, I've found this to be a bit unreliable as some browsers doesn't really like this for some reason.
Or, perhaps better, you could do a redirect after the form is submitted, where you redirect to the new "prettier" URL.
It all depends on your purpose.
I have a quick question i hope you guys can answer, i've got a search system that uses POST to do searches, now i want to track queries using Google Analytics but it requires using GET url parameters to pull parameters out the URL, what i don't want to do is rewrite the entire search system to use GET instead of POST. Is there any way around this? I was thinking maybe i can make a GET call to a new page from the page that recieves the search POSTs, but i don't want it to redirect, i merely want it to "hit" the url without actually redirecting?
Is this possible?
Any other solutions would also be appreciated.
Thanks for the help
You can specify an abritrary URL when you add your GA code. For example, all our different checkout pages go through validate.php, so this is the URL that the person would see, however, we put in some extra code to give a specific tracking URL to google.
For example:-
<script type="text/javascript">
try {
var pageTracker = _gat._getTracker("UA-XXXXX-1");
pageTracker._setDomainName("example.com");
pageTracker._trackPageview("/checkout/login/");
} catch(err) {}
</script>
Would make google track this as being /checkout/login/ even though the page in the browser actually shows /validate.php
You can output (as we do) this page variable from different PHP variables
$searchterm = $_POST['search'];
echo 'pageTracker._trackPageview("/search/' . urlencode($searchterm) . '");';
Sure, use the apache mod_rewrite module to create a fancy, seo friendly url and pass the user keywords in the url.
Something like "www.yoursite.com/search/what+a+user+searches+for/"
In a .htaccess file you create a rule
RewriteRule ^search/(.*)/$ /search.php?keywords=$1
You're orignal script keeps working with your postvalues and you provide an URL with GET variables. With explode("+", $_GET["keywords"]) you can extract the searchvalues.
With the array $_REQUEST you can access all request parameters GET and POST.
The only way you will be able to do this, is re-set the forms method to GET and just changed the $_POST requests to $_GET
Thats not such a huge change?
You should be able to do that with HTTPRequest:
http://php.net/manual/en/class.httprequest.php
You can just alter your Google Analytics code - see Tracking Custom Variables
I'm trying to make a bookmarklet that will take the URL of the current page you are on, and send it to an application written using CodeIgniter.
The problem I keep running into is that I can't do a standard AJAX call, because it's cross-domain. It is disallowed, and I can't figure out a way to use the JSONP via $_GET method since CodeIgniter blows away the $_GET parameter.
At this point I'll take any suggestions on how to do this. Please note that I need to send a URL, and if it's to be passed via a URL itself it obviously needs to be encoded or something. This I also haven't figured out how to do, so any pointers on that end would be appreciated as well.
Codeigniter unsets $_GET but you can get the data from the query string. It is a little inefficient because PHP will probably end parsing the query string twice, but it should work:
parse_str($_SERVER['QUERY_STRING'], $get);
print_r($get);
All the GET variables should be accesible in the variable $get. See parse_str() documentation for some more information.
As an alternative you could url-encode the current URL and append it to what you are requesting e.g.
var url = 'http://example.com/bookmarklet/'
+ encodeURIComponent(window.location);
Then in Codeigniter do something like:
//you might have to call urldecode() on this value
$url = $this->uri->segment(0);
but you may find you then have this problem
It is possible to enable query strings in Codeigniter, but watch out for the caveats - you can't use the URL helper, for example.
How do I make it so that I can make a thing at the end of the address where the .php is and then tell it to do certain things. For example pull up a page like this:
sampardee.com/index.php?page=whatever
Help?
Anything else I could do with this?
This is generally achieved with the global php array $_GET. You can use it as an associative array to 'get' whatever variable you name in the url. For example your url above:
//this gives the $page variable the value 'whatever'
$page = $_GET['page'];
if($page == 'whatever'){
//do whatever
}
elseif($page == 'somethingelse'){
//do something else
}
Check out the php documentation for more information:
$_GET documentation
and there's a tutorial here:
Tutorial using QUERY_STRING and _GET
A small improvement over Brett's code:
if (array_key_exists('page', $_GET) === false)
{
$_GET['page'] = 'defaultPage';
}
$page = $_GET['page'];
// ... Brett Bender's code here
$_GET is usually used if you are sending the information to another page using the URL.
$_POST is usually used if you are sending the information from a form.
If you ever need to write your code so that it can accept information sent using both methods, you can use $_REQUEST. Make sure you check what information is being sent though, especially if you are using it with a database.
From your question it looks like you are using this to display different content on the page?
Perhaps you want to use something like a switch to allow only certain page names to be used?
i.e.
$pageName=$_REQUEST['page'];
switch($pageName){
case 'home':$include='home.php';break;
case 'about':$include='about.php';break;
case default:$include='error.php';break;
}
include($include);
This is a really simplified example, but unless the $page variable is either home or about, the website will display an error page.
Hope it helps!
I'm not quite sure what you're asking, but I think you're asking how to use GET requests.
Make GET requests against any PHP page as follows:
www.mysite.com/page.php?key1=value1&key2=value2
Now, from within PHP, you'll be able to see key1 -> value1, key2 -> value2.
Access the GET hash from within PHP as follows:
$myVal1 = $_GET['key1'] #resolves to "value1"
$myVal2 = $_GET['key2'] #resolves to "value2"
From here, play with your GET variables as you see fit.
The system of adding page parameters to a URL is know as HTTP GET (as distinct from HTTP POST, and some others less commonly used).
Take a look at this W3 schools page about GET in PHP and ahve a play about in getting parameters and using them in your PHP code.
Have fun!