suppose we have the following PHP page "index.php":
<?
if (!isset($_GET['req'])) $_GET['req'] = "null";
echo $_SERVER['REQUEST_URI'] . "<br>" . $_GET['req'];
?>
and the following ".htaccess" file:
RewriteRule ^2.php$ index.php?req=%{REQUEST_URI}
RewriteRule ^1.php$ 2.php
Now, let's access "index.php". We get this:
/index.php
null
That's cool. Let's access "2.php". We get this:
/2.php
/2.php
That's cool too. But now let's have a look at "1.php":
/1.php
/2.php
So... we ask for "1.php", it silently redirects to "2.php" which silently redirects to "index.php?req=%{REQUEST_URI}", but here the "%{REQUEST_URI}" seems to be "2.php" (the page we're looking for after the first redirection) and the $_SERVER['REQUEST_URI'] is "1.php" (the original request).
Shouldn't these variables be equal? This gave me a lot of headaches today as I was trying to do a redirection based only on the original request. Is there any variable I can use in ".htaccess" that will tell me the original request even after a redirection?
Thanks in advance and I hope I've made myself clear. It's my first post here :)
I'm not sure whether it will meet your needs, but try looking at REDIRECT_REQUEST_URI first, then if it's not there, REQUEST_URI. You mention in your comment to Gumbo's answer that what you're truly looking for is the original URI; REDIRECT_* versions of server variables are how Apache tries to make that sort of thing available.
Just change the order of the rules and it works:
RewriteRule ^1\.php$ 2.php
RewriteRule ^2\.php$ index.php?req=%{REQUEST_URI}
Or use just one rule:
RewriteRule ^(1|2)\.php$ index.php?req=%{REQUEST_URI}
Well I guess I solved the problem. I used the %{THE_REQUEST} variable which basically contains something like this: "GET /123.php HTTP/1.1". It remains the same even after a redirection. Thanks everyone for your help! :)
Related
I just saw this somewhere, and I'm interested on it, and can't seemed to find it anywhere or I just used the wrong words to search for.
Well I saw this link,
http://splur.gy/r/QqVYf/r/2tgNklHgmVK
and when I clicked it, I got redirected to other page which called
https://www.facebook.com/xxx.xxx?sk=app_xxxx
Anyone knows how this thing was made? or just a little hint to start off?
A help would be nice. :)
These are done with RewriteRule, a simple Google search willgive you mroe details.
In short, the URL will be broken down sorta like this: (Line 1, URL part, Line 2, PHP relative.
http://splur.gy
http://splur.gy/index.php
r
$_GET['var_1']
QqVYf
$_GET['var_2']
r
$_GET['var_3']
2tgNklHgmVK
$_GET['var_4']
The RewriteMod will take the URL as setup in the above format, and pass the varialbes to a script. It is another way of posting variables in the URL.
As you see above: stackoverflow.com/posts/15182831, does not actually have a file named posts/15182831, it is simple used as a variable, passed to a script which queries that database, and spits out results based on what the script says.
You will need to have a server that will allow you to rewrite requests so you can redirect all requests to a single script. If you are running Apache, you would create an .htaccess file with something like this in it:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteRule ^r$ /redirect.php [L,QSA]
RewriteRule ^r/(.*) /redirect.php?__q=/$1 [L,QSA]
</IfModule>
Then if you go to http://yourdomain.com/r/234243/adsfsd, the request will be sent to the script /redirect.php and '234243/adsfsd' will be passed as the GET paramiter 'q'.
Then you would create a file called redirect.php that would process the request and then redirect the user. It might look somthing like this:
<?php
$redirection = process_to_determine_location_from_query( $_GET['q'] );
header( 'Location: {$redirection}' );
?>
It's called a redirect. You can do it in PHP with this code:
<?php
header('http://example.com');
Another thing that might have happened is that the link you saw was not the actual link you follow when you click. It's as simple as doing this:
example.com
Anyone could do that.
http://www.google.com/
It has nothing to do with PHP.
How do I strip a part of the url? I do not know much about htaccess or apache.
I would like to strip www.mysite.com/page=services to www.mysite.com/services for example.
What exactly do I need to put in the .htaccess file in order to achieve this, and would that work for other pages as well?
Thanks.
I tried this for one of my sites lately and came up with this and for me it works fine,
this goes into the .htaccess file:
RewriteEngine On
RewriteRule ^([A-Za-z]+)/?$ index.php?page=$1 [NC,L]
then if you would write yoursite.com/pagename it would send yoursite.com/index.php?page=pagename to your php.
You will link to the page like so: yoursite.com/pagename
it wont change yoursite.com/index.php?page=pagename to yoursite.com/pagename in the adress bar after you send it.(if that makes sense :) )
I hope this is what you are looking for...
I think you mean your original URL to be www.mysite.com/index.php?page=services and not www.mysite.com/page=services
Also, you probably mean the opposite, you should switch www.mysite.com/services to www.mysite.com/index.php?page=service
Anyway, to change www.mysite.com/services to www.mysite.com/index.php?page=services then you need .htaccess, and the rule for that would be RewriteRule ^([^/]+)/?$ /index.php?page=$1 [L]
As suggested earlier, you should read about .htaccess, regex, and rewrite rules. Best resource is the apache documentation here: http://httpd.apache.org/docs/2.2/howto/htaccess.html
I read your comment earlier that you need the opposite, I am not sure why you need that, because the whole idea of URL shortining is to make easy-to-remember URLs in addition to some security concerns that can be resolved. The URL is the first thing that is sent to load your webpage, then .htaccess changes it to some form undrstandable by PHP then PHP deals with get parameters for example.
I would like to make my urls more seo friendly and for example change this:
http://www.chillisource.co.uk/product?&cat=Grocery&q=Daves%20Gourmet&page=1&prod=B0000DID5R&prodName=Daves_Insanity_Sauce
to something nice like this:
http://www.chillisource.co.uk/product/Daves_Gourmet/Daves_Insanity_Sauce
What is the best way of going about doing this? I've had a look at doing this with the htaccess file but this seems very complicated.
Thanks in advance
Ben Paton, there is in fact a very easy way out. CMSes like Wordpress tend to use it instead of messing around with regular expressions.
The .htaccess side
First of, you use an .htacess with the content below:
<IfModule mod_rewrite.c>
RewriteEngine On
RewriteBase /
RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule . /index.php [L]
</IfModule>
Let me explain what it does (line by line):
if the apache module named mod_rewrite exists..
turn the module on
let it be known that we will rewrite anything starting after the
domain name (to only rewrite some directories, use RewriteBase
/subdir/)
if the requested path does not exist as a file...
and it doesn't even exist as a directory...
"redirect" request to the index.php file
close our module condition
The above is just a quick explanation. You don't really need it to use this.
What we did, is that we told Apache that all requests that would end up as 404s to pass them to the index.php file, where we can process the request manually.
The PHP side
On the PHP side, inside index.php, you simply have to parse the original URL. This URL is passed in the $_SERVER variable as $_SERVER['REDIRECT_URL'].
The best part, if there was no redirection, this variable is not set!
So, our code would end up like:
if ( isset( $_SERVER['REDIRECT_URL'] ) ) {
$url = explode('/', $_SERVER['REDIRECT_URL'] );
switch($url[0]){
case 'home': // eg: /home/
break;
case 'about': // eg: /about/
break;
case 'images': // eg: /images/
switch( $url[1] ){
case '2010': // eg: /images/2010/
break;
case '2011': // eg: /images/2011/
break;
}
break;
}
}
Easy Integration
I nearly forgot to mention this, but, thanks to the way it works, you can even end up not changing your existing code at all!
Less talk, more examples. Let's say your code looked like:
<?php
$page = get_page($_GET['id']);
echo '<h1>'. $page->title .'</h1>';
echo '<div>'. $page->content .'</div>';
?>
Which worked with urls like:
index.php?id=5
You can make it work with SEO URLs as well as keep it with your old system at the same time. Firstly, make sure the .htaccess contains the code I wrote in the one above.
Next, add the following code at the very start of your file:
if ( isset( $_SERVER['REDIRECT_URL'] ) ) {
$url = explode('/', $_SERVER['REDIRECT_URL'] );
$_GET['id'] = $url[0];
}
What are we doing here? Before going on two your own code, we are basically finding IDs and information from the old URL and feeding it to PHP's $_GET variable.
We are essentially fooling your code to think the request had those variables!
The only remaining hurdle to find all those pesky <a/> tags and replace their href accordingly, but that's a different story. :)
It's called a mod_rewrite, here is a tutorial:
http://www.workingwith.me.uk/articles/scripting/mod_rewrite
What about using the PATH_INFO environment variable?
$path=explode("/",getenv("PATH_INFO"));
echo($path[0]."; ".$path[1] /* ... */);
Will output
product; Daves_Gourmet; Daves_insanity_Sauce
The transition from using $_GET to using PATH_INFO environment is a good programming exercise. I think you cannot just do the task with configuration.
try some thing like this
RewriteRule ^/([a-zA-Z0-9]+)/([a-zA-Z0-9]+)/([a-zA-Z0-9]+) /$1.php?id1=$2&id2=$3 [QSA]
then use $_GET to get the parameter values...
I'll have to add: in your original url, there's a 'prod' key, which seems to consist of an ID.
Make sure that, when switching to rewritten urls, you no longer solely depend upon a unique id, because that won't be visible in the url.
Now, you can use the ID to make a distinction between 2 products with the same name, but in case of rewriting urls and no longer requiring ID in the url, you need to make sure 1 product name can not be used multiple times for different products.
Likewise, I see the 'cat'-key not being present in the desired output url, same applies as described above.
Disregarding the above-described "problems", the rewrite should roughtly look like:
RewriteRule ^/product/(.*?)/(.*?)$ /product?&cat=Grocery&q=$1&page=1&prod=B0000DID5R&prodName=$2
The q & prodName will receive the underscored value, rather than %20, so also that will require some patching.
As you can see, I didn't touch the id & category, it'll be up to you to figure out how to handle that.
I have currently hit a bit of an issue with redirecting users with .htaccess and was wondering if anyone could help me.
1. Background:
I currently have a rather long domain name for the sake of this question lets refer to it as mylongdomainname.com now on this domain I have a subdomain that I use to host files, pictures etc to show friends or share with people this is files.mylongdomainname.com
now obviously the URL can get quite long as I have different directories and files. so to help reduce a bit of space I purchased another short domain, lets refer to this as small.me now what I want to do is use .htaccess and a simple PHP file to redirect small.me to files.mylongdomainname.com and pass on a file reference.
Example:
small.me/pictures/example.jpg should redirect to files.mylongdomainname.com/pictures/example.jpg
2. The problem
Basically I am unsure on the exact rewrite rule I would need to acomplish this. obviously I need a rule that will allow anything after small.me/ to be sent with the GET method to the index file which would then redirect the user accordingly. So that means that the rewrite rule will have to allow all letters, numbers and valid file name symbols to be used. I'm sure it's simple but after looking at a few tutorials and mod_rewrite help sites I still have no idea how to accomplish this.
3. The Code
.htaccess
RewriteEngine on
RewriteRule ^$ index.php?file_location=$1 [L]
obviously wrong
index.php
<?php
//Get the requested files location.
$file_location = $_GET['file_location'];
//Redirect the user to the file.
header('refresh:2; url=http://files.mylongdomainname.com/' . $file_location);
?>
4. Notes
I am aware I could just use a URL shortener, but because I am awkward I would rather it just went through my own domain, so please don't comment or answer telling me to use a shortener or to use a service like dropbox.
So can anybody help me by providing the right rule? Any help is much appreciated.
In .htaccess you can simply use:
RewriteRule ^(.*)$ http://small.me/?$1 [L]
No need for the PHP file if that's all you're trying to do.
Assuming you want this:
Picture to be shared: http://files.mylongdomainname.com/pictures/me/troll.jpg
Desired URL: http://small.me/pictures/me/troll.jpg
Remove the PHP file, just Place this in small.me's htaccess:
RewriteRule ^\/?(.*)$ http://files.mylongdomainname.com/$1 [NC,L]
The following in your .htaccess file should be all you need (no PHP file needed):
RewriteRule ^(.*) http://files.mylongdomainname.com/$1 [RL]
For more information and examples see the mod_rewrite documentation
So I have errors which are passed by the url, for example
index.php?error=nojs
will then be parsed by PHP to return an error message, for example: Please enable Javascript
I'm using the following line in my .htaccess to make the url easier to manage
RewriteRule ^ERROR_(.*)$ index.php/?error=$1&%{QUERY_STRING} [L]
It makes my URL look like this:
site.com/ERROR_nojs
The problem is, this only works for the root,
index.php?error=nojs works fine however
test/index.php?error=nojs does not?
So how can I convert the variable for every directory?
Thank you. (My original script handles hundreds of errors and filters out ones that might be useful to output to the user. It would be stupid to redirect them to the index just so they can see a small with an error message in it)
EDIT:
as Shai Mishali pointed out removing the '^' before ERROR did the trick.
RewriteRule ERROR_(.*)$ index.php/?error=$1&%{QUERY_STRING} [L]
But I forgot to tell you I have another variable ?page=
I need get that vairbale and add it to the url in order for this to work..
e.g:
index.php?page=home&error=nojs
= site.com/home/ERROR_nojs
so
www.site.com/?page=home&error=nojs = www.site.com/home/ERROR_nojs
or
www.site/?page=about&error=unknown = www.site.com/about/ERROR_unknown
I'm pretty sure your problem is your rule is looking for something that starts with ERROR (the ^ sign) .
/ERROR starts with error, which works in your root , but
/tests/ERROR starts with tests , so it won't recognize it.
Try removing the ^ sign and see what happens.
Shai.
You can use below code
RewriteRule ^([a-z0-9A-Z]+)/([a-z0-9A-Z]+)$ ./index.php?page=$1&error=ERROR_$2 [NC]
Your URL site.com/home/ERROR_nojs will treated as index.php?page=home&error=nojs and you can get the values by GET method. For more info