正则表达式iframe标签

Question

How can I "cut out" iframe tags in a string using regex so I can place them somewhere else on my page.

I got a page which shows an image at the top of an article, but when I add a video using my cms, I want that embedded video to be placed on the position of that image instead.

How can I look for those tags in a string and make them part of an array?

For example:

String:

This is the article title
<iframe width="853" height="480" src="https://www.youtube.com/embed/23r23ffwe" frameborder="0" allowfullscreen></iframe>
This is the article text

Should be usuable like:

$array[0] (title)
$array[1] (iframe)
$array[2] (text)

How can I select these tags? I can't find a clear answer on stackoverflow.

Answer 1

preg_match_all('@(.*)(<iframe(?:.*?)</iframe>)(.*)@gs', $html, $matches, PREG_SET_ORDER);

Then see $matches array. Or View regex in online debugger