What syntax should I use to provide regex?

The correct form of regular expression is delimiter{pattern}delimiter, f.e. /^([a-z]*)$/i or @^(?:http://)?([^/]+)@i. Every form compatible with functions checking correctness of regular expressions in PHP are allowed (example).

Why should I type pattern with delimiters?

The reason is obvious. With delimiters you have a chance to add modifiers to the regexp. Otherwise script will automatically add / at the beginning and / at the end of the pattern.

Can I add any content to the tester?

Generally, the user determines what content and at what way he wants to test, but it must have full rights to publish the test content because it will be available for other Internet users. You should also avoid writing obscene phrases, vulgar phrases, or suggest resources incompatible with Polish law. You are fully responsible for the content posted by you on the site. On the reasoned request of a third party individual entries can be removed from the site.

What are regular expressions?

A regular expression is a pattern that describes a set of strings.

  1. wikipedia.org - definition
  2. regular-expressions.info - knowledge compendium
  3. php.net - using in PHP

Where can I find examples of regular expressions?

There are a lot of examples on the internet. You should especially check this:

  1. 15 useful regular expressions in PHP [polish]
  2. regexlib.com - patterns library

I think I have found a bug in Regexp. Where can I report it?

Please submit every found bug by typing comment here (polish and english).

I am a forum user. Can I show pattern test to other users?

Yes. On ID column of every tested expression you can find hiperlink. Copy it and share, that's all.

How can I help develop website?

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regexp.pl

regular expressions tester

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Tester wyrażeń regularnych pozwoli Ci w prosty sposób sprawdzić poprawność wykorzystywnego wzorca i frazy. Wystarczy, że wypełnisz poniższy formularz, a skrypt zwróci wszelkie niezbędne do walidacji dane.

Dodając wzorzec i ciąg znaków do sprawdzenia potwierdzasz, że masz pełne prawa do upubliczniania zawartych w nich treści.

ID Wyrażenie regularne Ciąg znaków Wynik Zwracane ciągi znaków Link
119311 %/g sadasdasd% fałsz Link
119310 /%/g sadasdasd% fałsz Link
119309 (/%/g) sadasdasd% fałsz Link
119308 (/^([0-9]{2})-([0-9]{3})$/D): 123123 fałsz Link
119307 /^([\d+.]*)\s+([\w\/\-\.]+)$/ 1000 xp prawda
  1. 1000 xp
    • 1000
    • xp
 Link
119306 /^([\d+.]*)\s+([\w\/\-\.]+)$/ windows xp fałsz Link
119305 /^(.*)\s+([\w\/\-\.]+)$/ windows xp prawda
  1. windows xp
    • windows
    • xp
 Link
119304 /^(.*)\s+([\w\/\-\.]+)$/ 2x 10,3 stron/mies. prawda
  1. 2x 10,3 stron/mies.
    • 2x 10,3
    • stron/mies.
 Link
119303 /^(.*)\s+([\w\/\-\.]+)$/ 2x 10,3stron/mies. fałsz Link
119302 /^(.*)\s+([\w\/\-]+)$/ 2x 10,3stron/mies. fałsz Link
119301 /^(.*)\s+([\w\/\-]+)$/ 2x 10,3 m2/s prawda
  1. 2x 10,3 m2/s
    • 2x 10,3
    • m2/s
 Link
119300 /^(.*)\s+([\w\/]+)$/ 2x 10,3 m2/s prawda
  1. 2x 10,3 m2/s
    • 2x 10,3
    • m2/s
 Link
119299 /^(*)\s+([\w\/]+)$/ 2x 10,3 m2/s fałsz Link
119298 /^([\w\s\/\.\,]+)\s+([\w\/]+)$/ 2x 10,3 m2/s prawda
  1. 2x 10,3 m2/s
    • 2x 10,3
    • m2/s
 Link
119297 /^([\w\s\/\.\,]+)\s*([\w\/]+)$/ 2x 10,3 m2/s prawda
  1. 2x 10,3 m2/s
    • 2x 10,3 m2/
    • s
 Link
119296 /^([\w\/\.\,]+)\s*([\w\/]+)$/ 2x 10,3 m2/s fałsz Link
119295 /^([\d\.\,]+)\s*([\w\/]+)$/ 2x 10,3 m2/s fałsz Link
119294 /^([\d\.\,]+)\s*([\w\/]+)$/ 10,3 m2/s prawda
  1. 10,3 m2/s
    • 10,3
    • m2/s
 Link
119293 /^([\d\.]+)\s*([\w\/]+)$/ 10.3 m2/s prawda
  1. 10.3 m2/s
    • 10.3
    • m2/s
 Link
119292 /^([\d\.]+)\s*([\w\/]+)$/ 10.3 m/s prawda
  1. 10.3 m/s
    • 10.3
    • m/s
 Link
119291 /^([\d\.]+)\s*([\w\/]+)$/ 100 mm prawda
  1. 100 mm
    • 100
    • mm
 Link
119290 /^([\d]+)\s*(\w+)$/ 100 mm prawda
  1. 100 mm
    • 100
    • mm
 Link
119289 /^([\d]+)\s*(\w)$/ 100 mm fałsz Link
119288 /^([\d]+)\s*(\w\/)$/ 100 mm fałsz Link
119287 /^([\d\.]+)\s*(\w\/)$/ 100 mm fałsz Link

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