regex101: PCRE (Legacy) Match Workspace

Explanation

Pro

1st Alternative.*?iframe src=".*?(?:youtube|soundcloud|vimeo).*?".*

.*?any character (except for line terminators), repeated any number of times

iframe src="the literal text iframe src=" (case sensitive)

.*?any character (except for line terminators), repeated any number of times

Non-Capturing Group(?:youtube|soundcloud|vimeo)

1st Alternativeyoutube

youtubethe literal text youtube (case sensitive)

2nd Alternativesoundcloud

soundcloudthe literal text soundcloud (case sensitive)

3rd Alternativevimeo

vimeothe literal text vimeo (case sensitive)

.*?any character (except for line terminators), repeated any number of times

"the literal " (34₁₀ / 42₈ / 22₁₆)

.*any character (except for line terminators), repeated any number of times

2nd Alternative(.*?iframe src=".*?".*)

Group 1(.*?iframe src=".*?".*)

.*?any character (except for line terminators), repeated any number of times

iframe src="the literal text iframe src=" (case sensitive)

.*?any character (except for line terminators), repeated any number of times

"the literal " (34₁₀ / 42₈ / 22₁₆)

.*any character (except for line terminators), repeated any number of times

Global pattern flags

g modifier: global. Finds all matches instead of stopping after the first

Quick Reference

25 tokens

Regular Expression

.*?iframe src=".*?(?:youtube|soundcloud|vimeo).*?".*|(.*?iframe src=".*?".*)

New

&lt;p&gt;&lt;iframe src="http://www.3you3tube.com/embed/YoX1yc92MOU" width="500" height="300" frameborder="0" scrolling="auto"&gt;&lt;/iframe&gt;&lt;/p&gt;
29  &lt;p&gt;text daily to place domain staff as volunteers with charity partners, we know all too well that the "V" word can sometimes be misunderstood. Occasionally seen as a dusty, worthy word, it can conjure images of coffee mornings and bric-a-brac stalls. So its not always as easy as you might think to get people to embrace their inner-volunteer. That's why the &lt;a href="http://www.domain.co.uk/sdfn/2010/11/connect-create-domain-volunteers.shtml"&gt;Conne
&lt;p&gt;&lt;iframe src="http://www.youtube.com/embed/YoX1yc92MOU" width="500" height="300" frameborder="0" scrolling="auto"&gt;&lt;/iframe&gt;&lt;/p&gt;
29  &lt;p&gt;text daily to place domain staff as volunteers with charity partners, we know all too well that the "V" word can sometimes be misunderstood. Occasionally seen as a dusty, worthy word, it can conjure images of