regex101: PCRE (Legacy) Match Workspace

<iframethe literal text <iframe (case sensitive)

Positive Lookahead(?=\s)

\sany whitespace character

Positive Lookahead(?=(?:[^>"']|"[^"]*"|'[^']*')*?\ssrc\s*=\s*(?:(['"])(?:(?!\1)[\S\s])*?(?:specical\.com\/external\/widget\/api\.php?)(?:(?!\1)[\S\s])*?\1))

Non-Capturing Group(?:[^>"']|"[^"]*"|'[^']*')*?

*?repeats the group contents below any number of times:

1st Alternative[^>"']

Negated Character Class[^>"']

>the literal > (62₁₀ / 76₈ / 3E₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

'the literal ' (39₁₀ / 47₈ / 27₁₆)

2nd Alternative"[^"]*"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Negated Character Class[^"]*

*matches any number of characters outside the set below:

"the literal " (34₁₀ / 42₈ / 22₁₆)

3rd Alternative'[^']*'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Negated Character Class[^']*

*matches any number of characters outside the set below:

'the literal ' (39₁₀ / 47₈ / 27₁₆)

\sany whitespace character

srcthe literal text src (case sensitive)

\s*any whitespace character, repeated any number of times

=the literal = (61₁₀ / 75₈ / 3D₁₆)

\s*any whitespace character, repeated any number of times

Non-Capturing Group(?:(['"])(?:(?!\1)[\S\s])*?(?:specical\.com\/external\/widget\/api\.php?)(?:(?!\1)[\S\s])*?\1)

Group 1(['"])

Character Class['"]

'the literal ' (39₁₀ / 47₈ / 27₁₆)

"the literal " (34₁₀ / 42₈ / 22₁₆)

Non-Capturing Group(?:(?!\1)[\S\s])*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!\1)

\1the text saved by group 1

Character Class[\S\s]

\Sany non-whitespace character

\sany whitespace character

Non-Capturing Group(?:specical\.com\/external\/widget\/api\.php?)

specicalthe literal text specical (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

comthe literal text com (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

externalthe literal text external (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

widgetthe literal text widget (case sensitive)

\/the literal / (47₁₀ / 57₈ / 2F₁₆)

apithe literal text api (case sensitive)

\.the literal . (46₁₀ / 56₈ / 2E₁₆)

phthe literal text ph (case sensitive)

p?optionally matches the literal p (112₁₀ / 160₈ / 70₁₆) (case sensitive)

Non-Capturing Group(?:(?!\1)[\S\s])*?

*?repeats the group contents below any number of times:

Negative Lookahead(?!\1)

\1the text saved by group 1

Character Class[\S\s]

\Sany non-whitespace character

\sany whitespace character

\1the text saved by group 1

\s+any whitespace character, repeated at least once

Non-Capturing Group(?:"[\S\s]*?"|'[\S\s]*?'|[^>]*?)+

+repeats the group contents below at least once:

1st Alternative"[\S\s]*?"

"the literal " (34₁₀ / 42₈ / 22₁₆)

Character Class[\S\s]*?

*?matches any number of characters from the set below:

\Sany non-whitespace character

\sany whitespace character

"the literal " (34₁₀ / 42₈ / 22₁₆)

2nd Alternative'[\S\s]*?'

'the literal ' (39₁₀ / 47₈ / 27₁₆)

Character Class[\S\s]*?

*?matches any number of characters from the set below:

\Sany non-whitespace character

\sany whitespace character

'the literal ' (39₁₀ / 47₈ / 27₁₆)

3rd Alternative[^>]*?

Negated Character Class[^>]*?

>the literal > (62₁₀ / 76₈ / 3E₁₆)

Global pattern flags

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

25 tokens

Regular Expression

<iframe(?=\s)(?=(?:[^>"']|"[^"]*"|'[^']*')*?\ssrc\s*=\s*(?:(['"])(?:(?!\1)[\S\s])*?(?:specical\.com\/external\/widget\/api\.php?)(?:(?!\1)[\S\s])*?\1))\s+(?:"[\S\s]*?"|'[\S\s]*?'|[^>]*?)+>

New

<a href='https://www.google.lk/' id='21'>Google</a>  <a>Solution</a>


<a href='https://www.test.com/lk/' id='21'>Google</a><a href='https://www.google.lk/' id='21'>Google</a>  <a>Solution</a>

<a href='https://www.google.lk/' id='21'>Google</a>  <a>Solution</a>

<iframe width="100% !important" height="800px" src="//specical.com/external/widget/api.php?height=800px&amp;width=640px&amp; blablabal" ...... ></iframe>

the only part in concern is: