Need help with regex and preg_replace

Hi!
I have the following pattern and replacement:
// [img alt= align=]image_url[/img]
$patterns[] = “#[img alt=(.?)(.?) align=(left|right)]([^{^?].*?)[/img]#i”;}
$replacements[] = ‘<img src=”3″ alt=”1″ class=”2″ />’;

those two arrays are sent in as parameters to the preg_replace function later in the code.

The thing is that I want it to be able to write [img alt=myalttext align=right]myimgurl[/img] to set an alt-text to the image and align it to the right side of the page…so simply the html output should be something like
<img src=”myimgutl” alt=”myalttext” class=”right” />

Im new to regex so this might be totaly wrong from the very start of the regex

Thanks in advance!

Also in #PHP _↴