How to get all YouTube iframe from HTML using regex

Question

I want to get all YouTube iframe using regex and want to add specific tag to each record found.

For example <youtube-frame></youtube-frame> to iframe begeing and end.

Needed output:

<youtube-frame><iframe width="560" height="315" src="https://www.youtube.com/embed/vakfMRyjulw" frameborder="0" allowfullscreen></iframe></youtube-frame>

<youtube-frame><iframe width="560" height="315" src="https://www.youtube.com/embed/aDGWMlKPKDs" frameborder="0" allowfullscreen></iframe></youtube-frame>

My Code

$embed = '
<iframe width="560" height="315" src="https://www.youtube.com/embed/vakfMRyjulw" frameborder="0" allowfullscreen></iframe>

<iframe width="600" height="350" src="https://tune.pk/player/embed_player.php?vid=6508414&folderp2016/05/04/&width=600&height=350&autoplay=no" frameborder="0" allowfullscreen scrolling="no"></iframe>

<iframe width="560" height="315" src="https://www.youtube.com/embed/aDGWMlKPKDs" frameborder="0" allowfullscreen></iframe>

<iframe width="600" height="350" src="https://tune.pk/player/embed_player.php?vid=6508414&folder=2016/05/04/&width=600&height=350&autoplay=no" frameborder="0" allowfullscreen scrolling="no"></iframe>

<iframe width="600" height="350" src="https://tune.pk/player/embed_player.php?vid=6508414&folder=2016/05/04/&width=600&height=350&autoplay=no" frameborder="0" allowfullscreen scrolling="no"></iframe>
';

What I have tried?

$pattern = '/<iframe\.*src=\"//youtube"\.*/';
$iframeSrc = preg_match($pattern, $embed, $matches);
var_dump($iframeSrc);

Error_reporting is not an option for you? Why do you think src=\"//youtube" would match src="https://www.youtube.… ? — mario
– mario, Commented May 4, 2016 at 13:12
I already answered, but still: What would be missing at your question below "What I have tried?" is the result of the code you tried (such as the output of var_dump). — CherryDT
– CherryDT, Commented May 4, 2016 at 13:19

Damien · Accepted Answer · 2020-11-21 00:15:45Z

4

Try this:

$iframeSrc = preg_replace('/<iframe[^>]*src\s*=\s*"?https?:\/\/[^\s"\/]*youtube.com(?:\/[^\s"]*)?"?[^>]*>.*?<\/iframe>/i', '<youtube-frame>$0</youtube-frame>', $embed);

This uses preg_replace and a global regex to replace all YouTube IFrame tags (including their closing tags) with <youtube-frame>$0</youtube-frame> where $0 is the original string.

The regex could theoretically be simplified if you are totally sure about the format of your input, but I designed it to be robust enough to cope with other syntaxes such as src=http://example.com or src = "http://example.com" etc. which are accepted by browsers nowadays, and it only matches sources on *.youtube.com domains and not something like myyoutubesite.com.

edited Nov 21, 2020 at 0:15

Damien

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answered May 4, 2016 at 13:13

CherryDT

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2 Comments

Hassaan Over a year ago

Thank you @CherryDT Could you please explain what gido here <\/iframe>/gi

CherryDT Over a year ago

g makes it global so it matches multiple times (otherwise it would match only one time plus any submatches), i makes it case-insensitive because <IFRAME> is also a valid way to define an IFrame, as would be <iFrAmE>.

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