Htaccess and php preg_match?

PHP
1

Hey,

I’m just wondering how to use the preg_match function in php to meet the variables of the htaccess

strictly to the point, hope you understand my silly english (:

look in htaccess we use things like

RewriteRule ^([^/]+)/$ ./test.php?url=$1

what i’m looking for is what is the variable which we use in the preg_match function to meet the code

([^/]+)/

and how to add many variables like

RewriteRule ^([^/]+)/p([0-9]+).html$ ./test.php?url=$1&page=$2

what is the equivalent of these variables in the preg_match function ?

cuz i’ve seen alot of the examples like this one :eek:

preg_match("/^([a-z0-9])(([-a-z0-9._])*([a-z0-9]))*\\@([a-z0-9])(([a-z0-9-])*([a-z0-9]))+(\\.([a-z0-9])([-a-z0-9_-])?([a-z0-9])+)+$/i", $string);

but i didn’t understand what’s in it. :confused:

2

well, the PHP preg_match looks like it checks if it’s a valid email address.

Are you asking how to pass matches into a variable in php?

preg_match($pattern, $string, $match);
//if there's a match, it will be passed into $match variable as an array

the htaccess examples you gave above is more of a preg_replace function in php where $n (n is any number). here’s an example from http://www.php.net/manual/en/function.preg-replace.php


$string = 'April 15, 2003';
$pattern = '/(\\w+) (\\d+), (\\d+)/i';
$replacement = '${1}1,$3';
echo preg_replace($pattern, $replacement, $string);

//output: April1,2003

each $n variable is based on each pattern/subpattern

3

yes i know that the example i wrote above was for checking if an e-mail is valid

and i know how to use the preg_match function but my question is what are the patterns that’s equivalent to the htaccess codes which i can use in the preg_match function ??

4

To have PHP pick up those variables from the previous mod_rewrite you showed us, you would simply do this in your test.php

test.php


<?php

echo 'page is ' . $_GET['page'];
echo 'url is ' . $_GET['url'];
5

well thank you but i already know that, actually every php beginner knows that :smiley:

my question is what is the pattern that’s equivalent to this code “([^/]+)”, this code “([^/]+)/p([0-9]+).html”, and so on.

i just want to redirect all the links to the test.php file which in turn match the requested link to the exact pattern i want then send data which i got from the link pattern to another page. like in vbseo plugin all links are redirected to the vbseo.php file.

6

Are you saying you want PHP to redirect the user depending on the value of $_GET[‘url’], and the pattern you are looking to match is something like p123.html ?

If that is not what you mean, then try and spend a bit more time and attention in giving us an actual specific example of what you do want, and maybe someone will be able to help you out.

7

guess i’ve pissed you off and i’m sorry didn’t mean to

i’m not depending on the value of $_GET[‘url’]

i’m depending on the value of $_SERVER[‘REQUEST_URI’]

guess now there’s no mystery in my question :wink:

8

Im not pissed off, but I am getting exasperated because I fail to understand your problem. Dont worry, a forum is sometimes not the best method for getting ideas across – time lags, language differences etc.

Let’s try this:

Give us a concrete example of a value that $_SERVER[‘REQUEST_URI’] would hold (just make one up that typifies your problem).

Then explain what the regex has to extract from that - don’t describe it in terms, show us exactly the text or decision that has to be extracted from that $_SERVER[‘REQUEST_URI’]

9

([^/]+)/

Is a valid preg_match pattern, which reads “One or more of anything that isnt a /, followed by a /”.

How to decode it:
() is a subpattern. the / on the end is a literal /. So we’ve dealt with those. Remaining pattern: [^/]+
is a character class. + after a character class means “One or more of the preceding class”.
^ at the beginning of a character class means “negate the class”
the / is again a literal /.
So now that you’ve broken it down, build it back up:
^/ “Not a slash.”
[^/]+ “One or more not-a-slash-es”
([^/]+)/ “One or more not-a-slashes followed by a slash.”, which, reworded, is “One or more of anything that isnt a /, followed by a /”.

http://us.php.net/manual/en/reference.pcre.pattern.syntax.php

EDIT: Note that the ^ has another meaning if used outside of a character class.

10

ok then, I’m working on a cms script and one of the urls (the topic one) should be like

http://www.example.com/cmsdir/category/topic1/topic-name.html

when i redirect the urls to the test.php file which includes the following simple code

<?php

echo $_SERVER['REQEST_URI'];

?>

it prints me out

/cmsdir/category/topic1/topic-name.html

and the htaccess file has the following code


RewriteEngine On

RewriteCond %{REQUEST_FILENAME} !-f
RewriteCond %{REQUEST_FILENAME} !-d
RewriteRule ^(.+)$ test.php [L,QSA]

i want to use the preg_match function to match the requested url to an exact pattern that is

/category/topic1/topic-name.html

and if it matches this pattern the test.php file sends the variables (that i extract from the url such as $category,$id and $name) to another file which has the query codes

and thank you for your patience :slight_smile:

11

So… the request URI contains /cmsdir/category/topic1/topic-name.html, and you want to capture category, topic1, and topic-name.

preg_match(“~/cmsdir/([^/]+)/([^/]+)/([^/]+).html~”,$_SERVER[‘REQEST_URI’],$matches);

$matches[1] = category
$matches[2] = topic1
$matches[3] = topic-name

12

well i tried the code ([^/]+)/ in the test file and it get’s me the next error

Warning: preg_match() [function.preg-match]: Unknown modifier '/' in C:\\xampp\\htdocs\\cmsdir\	est.php on line 3

and here’s the content of the test.php file


<?php

Preg_Match('([^/]+)/', $_SERVER['REQUEST_URI'], $Match);

if(isset($Match[1])) {
echo "Good";
}else {
echo "Bad";
}

?>
13

well let me try this one :slight_smile:

14

Great One, this is my pattern :smiley:
when i copied the code it gave me an error then i realized that REQUEST_URI is missing the U ;), anyway it’s working :smiley:
many thanks <3 <3

15

another simple question

when i use code like

preg_match("~/news/?~",$_SERVER['REQUEST_URI'],$matches);

when i use the link like “http://www.example.com/cmsdir/news/” it matches

and if i use it like “http://www.examples.com/cmsdir/news/anything-here” it matches too :S

is there anyway to match only the “http://www.example.com/cmsdir/news/” link ??

16

“~/news/?$~”

17

You are Awesome :smiley: thank you <3