str_replace or ereg_replace and image maps

More simple by using the 'e' modifier on the regexp IMO. E.g.

$imagemap = preg_replace("/href=\"([^\"]*)\"/ie", '"href=\"" . tep_href_link(FILENAME_DEFAULT, $cPath . '_' . $matches[1]) . '\"'', $imagemap );

I hope it helps,
Zoltan

vorbe, this almost worked using the following code:

function replace_one($group_cat_ids) {
   global $cPath, $page;
   return 'href="' . tep_href_link(FILENAME_DEFAULT, 'cPath=' . $cPath . '_' . $page . '_' . $group_cat_ids[0]) . '"';
}


I build the array $group_cat_ids - code not shown - array values are 29, 30, 31, 32
The next line modifies each href and retains the above values in one call - don't quite understand that as the above function
only references the first value in the array $group_cat_ids[0].

$imagemap = preg_replace_callback("/href=\"([^\"]*)\"/i", "replace_one", $imagemap);

The typical result in the imagemap html is:

href="http://10.0.0.3/pewter/index.php?cPath=5_2_24_href="29""

What is not quite correct is the _href="29"
I need to remove the href=" and second "
I see what is happening, it is retaining the search string href="29" and prefixing, where as I'm hoping to get the following:

href="http://10.0.0.3/pewter/index.php?cPath=5_2_24_29

zmagyar, the page would not display with your code added, may be I'm using it incorrectly or may be there is a syntax error?

vorbe, a slight change and a str_replace has got me there, but you might see a neater way:

$imagemap = preg_replace_callback("/href=\"([^\"]*)/i", "replace_one", $imagemap);

$imagemap = str_replace('_href="', '_', $imagemap);

Actually the callback function gets a special array. At position 0 is the whole match, that is href="29" in the example. At position 1 is only 29, i.e. the part in the parentheses (if you look at the regular expression). I understood you needed only that string, not the whole href="29" string so I used that - $matches[1] (not $matches[0]).

That should be like this:

function replace_one($group_cat_ids) {
   global $cPath, $page;
   return 'href="' . tep_href_link(FILENAME_DEFAULT, 'cPath=' . $cPath . '_' . $page . '_' . $group_cat_ids[1]) . '"';
}

Sorry for missing to set global those vars in my example ;)

Sorry, yes I see it does work $group_cat_ids[1], I was thinking the [1] was refering to the second value in the array values 29, 30, 31, 32, but instead it is referencing the search string. I shall never understand regular expression syntax, I shall always have to rely on the experts!

BTW I have also adjusted the regexp to be more flexible on the href tag allowing spaces before and after the = char. It can be tuned a bit more by allowing both single and double quotes if required.

zmagyar, in the imagemap there are up to 3 x href="#" to replace, hence I have built an array of those # values for vorbe's example (if that is correct), or does your example not care what the # value is, does it retain the value whatever it is?

It retains the value see the example script. E.g. if $imagemap = ' href="29" ... href="30"' and $cPath="path/filename.html" then the above regexp will chane it to $imagemap = ' href="path/filename.html_29" ... href="path/filename.html_30"'