php - extract image src from text?

Question

I have a variable $content that contains some text and images in this form (unknown amount of images):

    text text text text <img src="path/to/image/1">text text text text
    <img src="path/to/image/2">
text text text text text text text text text text text text text text text text <img src="path/to/image/3"><img src="path/to/image/4">text text text text 
<img src="path/to/image/5">

I want to extract all images src and store them in array using php like so:

array(
[1]="path/to/image/1"
[2]="path/to/image/2"
[3]="path/to/image/3"
[4]="path/to/image/4"
[5]="path/to/image/5"
.
.
.
)

what is the best way to do something like this. I already tried the function explode but this way seemed inefficient.

Answer 1

    $dom = new domDocument;
    $dom->loadHTML($html);
    $dom->preserveWhiteSpace = false;
    $imgs  = $dom->getElementsByTagName("img");
    $links = array();
    for($i = 0; $i < $imgs->length; $i++) {
       $links[] = $imgs->item($i)->getAttribute("src");
    }