preg_match() question: Operation to occurrence does not result

<?php

/*
Using a function to perform an operation to an occurrence before
returning it to the replacement string does not work in preg_replace.
Consider the following code in which I want to urlencode the
replacement string which does not work.
I tried to call another function but that did not work either.

May be I do something wrong ???

Thanks,

Klaas


*/

$string = "<a href=\"/path/path2/script.php?session_id=zEFCFClDmmlFFHE15416&option= myoption\">My
Option</a><br>";

echo "urlencode the parameter part: [" .
preg_replace('/(<a.+href=\")([^\"]+)/i', "$1". urlencode('\\2'),
$string) . "]\n";
echo "uppercase the parameter part: [" .
preg_replace('/(<a.+href=\")([^\"]+)/i', "$1". strtoupper("$2"),
$string) . "]\n";

/*

Content-type: text/html
X-Powered-By: PHP/4.3.3RC4

urlencode the parameter part: [<a href="%5C2">My Option</a><br>]
uppercase the parameter part: [<a
href="/path/path2/script.php?session_id=zEFCFClDmmlFFHE15416&option= myoption">My
Option</a><br>]
*/

?>

thenetflyer wrote:
....
> $string = "<a href=\"/path/path2/script.php?session_id=zEFCFClDmmlFFHE15416&option= myoption\">My
> Option</a><br>";
>
> echo "urlencode the parameter part: [" .
> preg_replace('/(<a.+href=\")([^\"]+)/i', "$1". urlencode('\\2'),
(snip)

You need to specify the /e option in the regular expression


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