Preg match and replace for img urls

I have used preg match to find in a page all img tags:

<(img)[^>]*?>

Code (markup):

Can someone please tell me how i would check if it has a full url and if it does not replace it with a full url from a variable called $link2. I would also like to be able to process urls which have change directory such as: ../images/example.gif --> to http://example.com/images/example.gif using the http://example.com previously stored in $link2.

I have tried, without any luck:

if ($urlres = true) {
						
						for($i = 0, $size = sizeof($matches[0]); $i < $size; ++$i)
					{
					$imgurl =  preg_match_all('#http:\/\/#si', $matches[0][$i], $matches);
					if ($imgurl = true) {break;} else 
					preg_replace('#src="#si', '#src="$link2#', $matches[0][$i]);
					}
			}
			

Code (markup):

Thanks

 

I think you need to use $matches[1]

 

if (preg_match_all('/<img[^>]+>/isU', $html, $matches) {

for($i = 0, $size = sizeof($matches[0]); $i < $size; ++$i) {

if (preg_match('#http:\/\/#si', $matches[0][$i]) break;
else preg_replace('#src="#si', 'src="' . $link2 . '#', $matches[0][$i]);
}
}

 

so your problem is that you use $imgurl = preg_match_all('#http:\/\/#si', $matches[0][$i], $matches);

I mean you already have array $matches so you have to use $matches2 for example
or use code that I posted above

btw you may also use str_replace. Sometimes it is faster.
and also you might be interesting in preg_replace_callback function

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