用PHP获取photoshop写入图片的文字信息

$image_info = array();
$size = getimagesize('图片文件.jpg', $info);
if(isset($info['APP13']))
{
    $iptc = iptcparse($info['APP13']);
    foreach (array_keys($iptc) as $s)
    {             
        $c = count ($iptc[$s]);
        for ($i=0; $i <$c; $i++)
        {
            @$image_info[$s] .= $iptc[$s][$i];
        }  
    }
}
print_r($image_info);