Writing ECMAScript Javascript Regex to Perl flavour (PCRE) / (PCRE2)

Question

I'm having the below Regex which is written to support the ECMAScript Javascript flavour. However, this has to be re-written in the Perl flavour (PCRE) / (PCRE2)

(?<!x)(?<!\border\D*\W*)(?<!\border\D*number\W*)(?=(?:[._ –-]*\d){9})(?!9|66\D*6|00\D*0|(?:\d\D*){3}0\D*0|(?:\d\D*){5}0(?:\D*0){3})\d(?:[._ –-]*\d){4}

The above regex has Set of rules in it, Regex Demo here

I don't have an idea in Perl on how to implement it, however if i could get a help on this, it would be great!

anubhava · Accepted Answer · 2022-04-07 07:22:03Z

2

You may use this PCRE compliant regex equivalent of your Javascript regex:

\border(?:\s*number)?\W*\d+(*SKIP)(*F)|(?<!x)(?=(?:[._ –-]*\d){9})(?!9|66\D*6|00\D*0|(?:\d\D*){3}0\D*0|(?:\d\D*){5}0(?:\D*0){3})\d(?:[._ –-]*\d){4}

RegEx Demo

The idea of the (*SKIP)(*FAIL) trick is to consume characters that you want to avoid, and that must not be a part of the match result.
(*F) shorthand for (*FAIL)

edited Apr 7, 2022 at 7:22

answered Apr 6, 2022 at 19:17

anubhava

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11 Comments

The fourth bird Over a year ago

Good old SKIP FAIL :-)

anubhava Over a year ago

Thanks, that's the only work around for dynamic length lookbehind of JS

Kamesh Over a year ago

@anubhava, I worked on it, and got this to work.

(\border\D*\W*)\d+(*SKIP)(*F)|(\border\D*number\W*)\d+(*SKIP)(*F)|(?<!x)(?=(?:[._ –-]*\d){9})(?!9|66\D*6|00\D*0|(?:\d\D*){3}0\D*0|(?:\d\D*){5}0(?:\D*0){3})\d(?:[._ –-]*\d){4}

hope i didn't do anything wrong and make it more complex. Thoughts?

Michail Over a year ago

@anubhava, thank you very mutch for your explanation

Kamesh Over a year ago

@anubhava, i have posted the new question.. You can find it here link

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