Regular Expressions 101

Save & Share

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

Code Generator

Language

Generated Code

re = /translate\(\'([^)]*)\',/ str = '<div class="row"> <div class="col-md-12"> <div class="content-title"><?php echo $this->translate(\'Contattaci\'); ?></div> <?php if ( $this->messageProcessed && $this->sendError ): ?> <div class="alert alert-danger"> <h4><span class="glyphicon glyphicon-exclamation-sign"></span> <?php echo $this->translate(\'Errore Invio Messaggio\'); ?></h4> <?php echo $this->translate(\'Spiacenti, si &eacute; verificato un errore durante l&rsquo;invio del messaggio\'); ?>. <p class="error"><?php echo $this->sendError; ?></p> </div> <?php elseif ( $this->messageProcessed & !$this->sendError ): ?> <div class="alert alert-success"> <h4><span class="glyphicon glyphicon-ok-circle"></span> <?php echo $this->translate(\'Messaggio Inviato\'); ?></h4> <?php echo $this->translate(\'Grazie per il tuo messaggio. Risponderemo nel pi&uacute; breve tempo possibile\'); ?>. </div> <?php else: ?> <div class="well well-sm"> <?php echo $this->translate(\'Compila il modulo seguente per inviarci un tuo messaggio.\'); ?><br /> <?php echo $this->translate(\'Sarà nostra premura rispondere nel minor tempo possibile per fornirti tutte le informazioni di cui puoi necessitare.\'); ?> </div> <?php if ( $this->getSetting(\'site_phone\') ): ?> <div class="alert alert-info alert-dismissable"> <button aria-hidden="true" data-dismiss="alert" class="close" type="button">×</button> <span class="glyphicon glyphicon-info-sign"></span> <?php echo $this->translate(\'Se preferisci, puoi contattarci telefonicamente al numero <b>%s</b>\', $this->getSetting(\'site_phone\')); ?> </div> <?php endif; ?> <div class="contact-form"> <?php echo $this->form; ?> <div class="clearfix"></div> <p>&nbsp;</p> <div class="small text-justify well well-sm"> <?php echo $this->translate(\'I dati personali saranno trattati ai sensi del D.Lgs. 196/2003, sulla tutela delle persone e di altri soggetti rispetto al trattamento dei dati personali, il trattamento delle informazioni che ti riguardano, sarà improntato ai principi di correttezza, liceità e trasparenza e tutelando la tua riservatezza e i tuoi diritti.\'); ?> </div> </div> <?php endif; ?> </div> </div> ' # Print the match result str.scan(re) do |match| puts match.to_s end

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 Ruby, please visit: http://ruby-doc.org/core-2.2.0/Regexp.html