php - Get all images url from string

Hi,
I have found solution to get first image from string:

preg_match('~]*src\s?=\s?[\'"]([^\'"]*)~i',$string, $matches);

But I can't manage to get all images from string.
One more thing... If image contains alternative text (alt attribute) how to get it too and save to another variable?
Thanks in advance,
Ilija

Answer

This is what I tried but can't get it print value of src

 $dom = new domDocument;

    /*** load the html into the object ***/
    $dom->loadHTML($html);

    /*** discard white space ***/
    $dom->preserveWhiteSpace = false;

    /*** the table by its tag name ***/
    $images = $dom->getElementsByTagName('img');

    /*** loop over the table rows ***/
    foreach ($images as $img)
    {
        /*** get each column by tag name ***/
        $url = $img->getElementsByTagName('src');
        /*** echo the values ***/
        echo $url->nodeValue;
        echo '
';
    }

EDIT: I solved this problem

$dom = new domDocument;

/*** load the html into the object ***/
$dom->loadHTML($string);

/*** discard white space ***/
$dom->preserveWhiteSpace = false;

$images = $dom->getElementsByTagName('img');

foreach($images as $img)
    {
        $url = $img->getAttribute('src');   
        $alt = $img->getAttribute('alt');   
        echo "Title: $alt
$url
";
    }