怎麼讀取<img>裡的title

如何讀取裡的title
在下面的函數中，讀取了src，請問如何再讀取裡的title
function get_pic_list($content='')
{
$pattern="//";
preg_match_all($pattern,$content,$match);

$arr_pic = array();
$i = 0;
foreach($match[1] as $imgsrc)
{
$arr_pic[$i]['src'] = $imgsrc;
$i++;
}

return $arr_pic;
}
------解決思路----------------------
如果不確定是否每張圖都有title標記，需要二次正則擷取。
修改如下：

function get_pic_list($content='')
{
    $pattern="/------解決思路----------------------
\"](.*?(?:[\.gif
------解決思路----------------------
\.jpg]))[\'
------解決思路----------------------
\"].*?>/"; 
    preg_match_all($pattern,$content,$match); 

    $arr_pic = array();
    $i = 0;
    for($i=0,$len=count($match[1]); $i<$len; $i++){
        $arr_pic[$i]['src'] = $match[1][$i];
        preg_match('/title=[\'
------解決思路----------------------
\"](.*?)[\'
------解決思路----------------------
\"]/', $match[0][$i], $match1);
        $arr_pic[$i]['title'] = isset($match1[1])? $match1[1] : '';
    }
    return $arr_pic;
}

$content =<<


  管理菜單
  


TXT;

$result = get_pic_list($content);

print_r($result);

Array
(
    [0] => Array
        (
            [src] => /assets/ico_set.gif
            [title] => title1
        )

    [1] => Array
        (
            [src] => /assets/arrow_down.gif
            [title] => title2
        )

    [2] => Array
        (
            [src] => /assets/arrow_down123.gif
            [title] => 
        )

)

