regular expression and function call

Anon

I have formed a regular expression to replace <image>xyz</image> with a full image tag. I'm not sure whether its possible but a key part of doing this is the ability to manipulate the data after it is extracted and before it is replaced.

$item[$p_key] = ereg_replace("<image>([^{<]*)</image>",} "\1", $item[$p_key]);

What I would like to do is feed the "\1" into a function to find the image's width and height, etc... and build the string to use for the replace. Is this possible? Have I missed something obvious? Thanks.

Anon

I am not sure that I understood what exactly you were asking, but here is a useful way to create an image tag:

$imagesize = GetImageSize($imagepath);
echo "<img src=\"".$imagepath."\" align=right width=".$imagesize[0]." height=".$imagesize[1].">\n";

Anon

I guess I didn't explain it very well. Code similar to that provided would be encapsulated in a function call. More specifically:

I have a string that contains something like: "blah blah blah <image>someimage</image> blah blah." I would like to extract the "<image>someimage</image>," pass "someimage" to the function and place the whole thing back into the original string to end up with something like: "blah blah blah <image src="/images/someimage.gif" width=10 height=10 border=0> blah blah."

Thanks though.

Anon

If I understand correctly 🙂 this should be what you need to do it.

function imagesize ($text) {
$imageurl=ereg("<IMAGE>([^{\"]+)</IMAGE>",} $text, $image);
$size=getimagesize($image[1]);
$imagetag="<IMG SRC=\"$image[1]\" $size[3]>";
return $imagetag;
}

echo imagesize("blah blah blah <IMAGE>demo.gif</IMAGE> blah blah blah");

This will take the demo.gif find the size and return a string that's formated like: <IMG SRC="demo.gif" width="x" height="y"> (except with the width and height filled in with the actual w/h)

Hope that helped.

Anon

Oops, I forgot to make it also echo the text surrounding the image... here\'s the code to make it also do that.

function imagesize ($text) {
$imageurl=eregi(\"<IMAGE>([^{\\"]+)</IMAGE>\",} $text, $image);
$size=getimagesize($image[1]);
$imagetag=\"<IMG SRC=\\"$image[1]\\" $size[3]>\";
$return=eregi_replace(\"$image[0]\", \"$imagetag\", $text);
return $return;
}

echo imagesize(\"blah blah blah <IMAGE>images/demo.gif</IMAGE> blah blah blah\");

That should do it.