Regex to change format of all img src attributes

Question

Let's say I have a string contaning HTML markup with many img tags that look like this:

<img src="data/images/original/3.png" alt="" />

I need a regular expression that would change all images to have paths like this:

<img src="/utils/locate-image?path=data%2Fmedia%2Fimages%2Foriginal%2F3.png" alt="" />

I'm not very good with regular expression so I would appreciate some code example that can do this?

Answer 1

Don't use regular expressions for this. The Simple HTML DOM parser should be perfect for the job.

It should be as easy as this:

foreach($html->find('img') as $e) {
  $e->src = "insert modified src here";
}

echo $html;

Answer 2

Don't use regular expressions for this. PHP's native DOM parser should be perfect for the job.

$dom = new DOMDocument;
$dom->loadHTML('<img src="foo" alt=""/>');
$images = $dom->getElementsByTagName('img');
foreach($images as $image) {
    $image->setAttribute('src', 'bar');
    echo $dom->saveXML($image);
}

echoes <img src="bar" alt=""/>