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PHP/REGEXP to inject data into html string

3 New Member

Salutations!

I have an odd situation and know nothing about regular expressions, but I believe I will need to use them to attempt what I have to do.

I am running a script in PHP 5 that takes some user input, formats and sends that input to a completely different server and puts that server's reply -- basically the entire returned page -- into a string. I have the entire contents of the resulting HTML page in a string called $ReturnedString. All this works properly. I can echo the string to the user and it displays the page the other server sent my script.

Now, here is where I get stuck. I want to be able to find the href="" inside <A> tags ONLY and inject a static string between the first double-quote and whatever the href might contain, then save the entire modified "page" back to the original $ReturnedString, or another string if necessary.

Any suggestions? Be kind to me, my coding skills are quite poor. :)

Oct 7 '06 #1

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3

2130

4,258

Recognized Expert Specialist

Is this of use?

[php]
<?php
$text = 'This is a text and a <a href="linkto.php?id=2">link</a>';
// find <a ..... </>yyy</a> tags
$pattern = "/<a.*? href=(\"|')(.*?)(\"|').*?>(.*?)<\/a>/i";
preg_match_all($pattern, $text, $matches);
echo '<pre>'; print_r($matches);
?>[/php]

Ronald :cool:

Oct 7 '06 #2

3

New Member

Thanks for the code.

It looks like we are going in the right direction. We get a cool array that contains pretty much all the stuff between the <a> tags, but its not quite what I am looking for.

The generated array only has the information from inside the <a> tags, and from what I can tell does not contain any of the html from anywhere else in the page.

I guess I dont really need a seperate array of the <a>'s and their content, but rather just need to be able to locate the HREFs inside <a>'s in a given string and inject a string directly between the href=" and everthing after it. For example, given a string containing the following html:
[PHP]
<html>
<body>
<a target="_top" id="foo" href="someplace.htm"></a>
<a target="_top" id="foo" href="anotherplace.htm"></a>
</body>
</html>
[/PHP]

I would like the final output string generated by the php code to be:

[PHP]
<html>
<body>
<a target="_top" id="foo" href="somecgi.cgi?u=someplace.htm"></a>
<a target="_top" id="foo" href="somecgi.cgi?u=anotherplace.htm"></a>
</body>
</html>
[/PHP]

Notice the "somecgi.cgi?u=" injected between the doublequote and the text after it.

Your thoughts?

Oct 8 '06 #3

3

New Member

I believe I figured it out. I used part of your regexp along with a preg_replace and the \\0 backreference.

It is working the way I want, I believe.

THANKS!

Oct 8 '06 #4

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