Regular Expressions 101

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An explanation of your regex will be automatically generated as you type.
Detailed match information will be displayed here automatically.
  • All Tokens
  • Common Tokens
  • General Tokens
  • Anchors
  • Meta Sequences
  • Quantifiers
  • Group Constructs
  • Character Classes
  • Flags/Modifiers
  • Substitution
  • A single character of: a, b or c
    [abc]
  • A character except: a, b or c
    [^abc]
  • A character in the range: a-z
    [a-z]
  • A character not in the range: a-z
    [^a-z]
  • A character in the range: a-z or A-Z
    [a-zA-Z]
  • Any single character
    .
  • Alternate - match either a or b
    a|b
  • Any whitespace character
    \s
  • Any non-whitespace character
    \S
  • Any digit
    \d
  • Any non-digit
    \D
  • Any word character
    \w
  • Any non-word character
    \W
  • Non-capturing group
    (?:...)
  • Capturing group
    (...)
  • Zero or one of a
    a?
  • Zero or more of a
    a*
  • One or more of a
    a+
  • Exactly 3 of a
    a{3}
  • 3 or more of a
    a{3,}
  • Between 3 and 6 of a
    a{3,6}
  • Start of string
    ^
  • End of string
    $
  • A word boundary
    \b
  • Non-word boundary
    \B

Regular Expression
No Match

/
/
g

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

use strict; my $str = '[trx_columns autoheight="no" indentation="yes" count="2"][trx_column_item width="40%"] <table> <tbody> <tr> <td width="96">Suprafaţa</td> <td width="96">39 m²</td> </tr> <tr> <td width="96">Bucătărie</td> <td width="96">9,2 m²</td> </tr> <tr> <td width="96">Odaie</td> <td width="96">19.3 m²</td> </tr> <tr> <td width="96">Antreu</td> <td width="96">4.3 m²</td> </tr> <tr> <td width="96">Bloc sanitar</td> <td width="96">3.3 m²</td> </tr> <tr> <td width="96">Balcon</td> <td width="96">2.9 m²</td> </tr> <tr> <td width="96"><strong>Preţ  total</strong></td> <td width="96"><strong>20 475 €</strong></td> </tr> </tbody> </table> [/trx_column_item][trx_column_item ]<a href="http://teatral.md/wp-content/uploads/2015/08/39.jpg"><img class="alignnone size-medium wp-image-4147" src="http://teatral.md/wp-content/uploads/2015/08/39-225x300.jpg" alt="39" width="225" height="300" /></a>[/trx_column_item][/trx_columns]'; my $regex = qr/(\[trx[^\]]+.)|(\[\/trx[^\]]+.)|(<a[^>]+.)|(<img[^>]+.)(<[^>]+.)/p; my $subst = ''; my $result = $str =~ s/$regex/$subst/rg; print "The result of the substitution is' $result\n";

Please keep in mind that these code samples are automatically generated and are not guaranteed to work. If you find any syntax errors, feel free to submit a bug report. For a full regex reference for Perl, please visit: http://perldoc.perl.org/perlre.html