Regular Expressions 101

<iframethe literal text <iframe (case sensitive)

.+?any character (except for line terminators), repeated at least once

src="httpthe literal text src="http (case sensitive)

s?optionally matches the literal s (115₁₀ / 163₈ / 73₁₆) (case sensitive)

://wwwthe literal text ://www (case sensitive)

.any character (except for line terminators)

youtubethe literal text youtube (case sensitive)

.any character (except for line terminators)

com/embed/the literal text com/embed/ (case sensitive)

Group 1([a-zA-Z0-9_-]{11})

Character Class[a-zA-Z0-9_-]{11}

{11}matches exactly 11 characters from the set below:

a-zone character from a (97₁₀) to z (122₁₀) (case sensitive)

A-Zone character from A (65₁₀) to Z (90₁₀) (case sensitive)

0-9one character from 0 (48₁₀) to 9 (57₁₀)

_the literal _ (95₁₀ / 137₈ / 5F₁₆)

-the literal - (45₁₀ / 55₈ / 2D₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^>]+?

+?matches at least one character outside the set below:

>the literal > (62₁₀ / 76₈ / 3E₁₆)

></iframe>the literal text ></iframe> (case sensitive)

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

<iframe.+?src="https?://www.youtube.com/embed/([a-zA-Z0-9_-]{11})"[^>]+?></iframe>

New

<iframe width="560" height="315" src="http://www.youtube.com/embed/12345678901" frameborder="0" allowfullscreen></iframe>