如何在php中显示DOMElement类的对象

Question

need your help.. I've seen a great answer from Dynamically replace the “src” attributes of all tags (redux) , but I don't know how to display from the code below

$dom=new DOMDocument();
$dom->loadHTML($your_html);
$imgs = $dom->getElementsByTagName("img");
foreach($imgs as $img){
    $alt = $img->getAttribute('alt');
    if ($alt == 'pumpkin'){
        $src = 'http://myhost.com/cache/img001.gif'; 
    } else if ($alt== '*'){
        $src = 'http://myhost.com/cache/img002.gif';
    } else if ($alt== 'cool image'){
        $src = 'http://myhost.com/cache/img003.jpg';
    }
    $img->setAttribute( 'src' , $src );
}

Answer 1

Use the DOMDocument::saveHTML() method, after you modify the image, by changing this line:

$img->setAttribute( 'src' , $src );

To this:

$img->setAttribute( 'src' , $src );
echo $dom->saveHTML( $img);