Urgent Help with Base64 encoding required!

[ghostwalkz]

Hi all,

 

I am really in need of a second pair of eyes on this, and a code snippet example would be perfect!

 

I have a long string which is actually html source code. ($html)

 

I need to base64 all the urls within this string.

 

To be more specific....

 

$html = "This is a test page <a href=\"http://test.com\"/a> blah blah blah <a href = \"http://www.microsoft.com\"/a>";

 

How can I base64 encode all the urls in this string including the http:// bit? Not jsut the first instance but recursively so all urls are converted within $html??

 

Heeeeelp me before I throw this laptop thru the window and then drive over it in my car!

 

 

 

 

[redarrow]

<?php

$str = 'This is an encoded string';

 

echo base64_encode($str);

?>

 

http://uk3.php.net/base64_encode

 

<?php

$str = 'VGhpcyBpcyBhbiBlbmNvZGVkIHN0cmluZw==';

echo base64_decode($str);

?>

 

http://uk3.php.net/manual/en/function.base64-decode.php

[ghostwalkz]

Hi thanks for the response, but that will base64 the entire string I need to just get the urls within the string, the good thing is that every url in my string is preceded by  "href=" if that helps anybody?

 

Again thanks for response I do need to use that php function tho.

 

Any more takers?

 

 

[GingerRobot]

Hows about:

 

<?php
$str = '<a href="http://www.microsoft.com">microsoft</a> Some text <a href="http://www.google.com">google</a>';
preg_match_all('|<a href="(.*?)">|',$str,$matches);
$replacements = array();
foreach($matches[1] as $k => $v){
$replacements[] = base64_encode($v);
}
$str = str_replace($matches[1],$replacements,$str);
echo $str;
?>

[redarrow]

<?php

$a=array("http://www.google.com","http://www.msn.com");

foreach($a as $b){

$test=base64_encode($b);

echo"<a href='$test'>Try me</a><br>";

}
?>

[ghostwalkz]

GingerRobot, your code is the closest so far:

 

I have put it up at http://www.weblogica.co.uk/test.php

 

as you can see it kinda seems to just encode the file and not the domain and http:// bit too, its good I could do with a little assistance in order to just kill this one off!

 

Thanks

 

 

[GingerRobot]

If you view the source, it's actually doing what you've asked - everything is encoded, including the http:// part. However, the resulting string is still part of a link. Without the http:// prefix, the browser will treat this as a relative link - it thinks that the encoded string is a path to something on your site.

 

I'm not sure what you really wanted to achieve with this encoding, so i cant suggest what to change.

[redarrow]

mod_rewrite you need............

 

 

.htaccess file

[GingerRobot]

Redarrow, sometimes i wonder if you've even paying attention to the question!

[ghostwalkz]

Hi GingerRobot, again thanks for the help,

 

the html has links that point to other sites which I need to encode and still need them to point the other site. I see what you are saying the encoded string seems local.

 

Can you alter the code to make it so the http:// isnt encoded but the rest of the url is ??

 

That should do it.

[ghostwalkz]

maybe add some kind off 'padding' so that 12 characters in it does the base64 encoding?

 

But how to change that code of yours to do that beats me.

[redarrow]

gingerobot i do read and i fill modrewrite would off been better

[GingerRobot]

I can, but it still wont link to the other site:

 

<?php
$str = '<a href="http://www.microsoft.com">microsoft</a> Some text <a href="http://www.google.com">google</a>';
preg_match_all('|<a href="http://(.*?)">|',$str,$matches);
$replacements = array();
foreach($matches[1] as $k => $v){
$replacements[] = base64_encode($v);
}
$str = str_replace($matches[1],$replacements,$str);
echo $str;
?>

 

The browser wont decode the string and work out which site it is supposed be going to. Perhaps i should have asked earlier, what are you actually trying to achieve?

[ghostwalkz]

GingerRobot - Thats it! You cracked it!

 

I know it wont link on my test site, but it will on the real one as the urls are dcoded on the fly during page-parsing thru a proxy.

 

one more thing..... I know its a lot to ask, is it possible for you to slot in a bit of code to urlencode each url before it is encoded in base64?

 

 

[GingerRobot]

Ah, ok - fair enough.

 

Im pretty sure you could have handled the last bit:

 

<?php
$str = '<a href="http://www.microsoft.com">microsoft</a> Some text <a href="http://www.google.com">google</a>';
preg_match_all('|<a href="http://(.*?)">|',$str,$matches);
$replacements = array();
foreach($matches[1] as $k => $v){
$replacements[] = base64_encode(urlencode($v));
}
$str = str_replace($matches[1],$replacements,$str);
echo $str;
?>

 

If thats it all sorted, then don't forget to hit the solved button

[ghostwalkz]

GingerRobot THANKS!

 

Problem solved, tryed to add you on msn but your listed address failed. Mine is mark*nospam*@*nospam*weblogica.co.uk.

 

***SOLVED***