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
Processing...

Test String

Substitution
Processing...

Code Generator

Language

Generated Code

$re = '~<p class="mb-40px">[^<>]*</p>\R?(*SKIP)(*F)|.~ms'; $str = '<p class="mb-40px"></g></svg> </a> </li> </ul> </div> </div> </div> </div> </div> </div> </div> <div class="comment-form-fields"> <input type="hidden" name="wp_avatar" id="wordpress-avatar" class="comment-meta-wordpress" value="" /> <input type="hidden" name="wp_user_id" id="wordpress-user_id" class="comment-meta-wordpress" value="" /> <input type="hidden" name="wp_access_token" id="wordpress-access_token" class="comment-meta-wordpress" value="" /> <p class="comment-form-posting-as pa-wordpress"> Comentezi folosind contul tău WordPress.com. <span class="comment-form-log-out"> (&nbsp;<a href="javascript:HighlanderComments.doExternalLogout( \'wordpress\' );">Dezautentificare</a>&nbsp;/&nbsp; <a href="#" onclick="javascript:HighlanderComments.switchAccount();return false;">Schimbă</a>&nbsp;) </span> </p> <p class="mb-40px"> Comentezi folosind contul tău Google. <span class="comment-form-log-out"> (&nbsp;<a href="javascript:HighlanderComments.doExternalLogout( \'googleplus\' );">Dezautentificare</a>&nbsp;/&nbsp; <a href="#" onclick="javascript:HighlanderComments.switchAccount();return false;">Schimbă</a>&nbsp;) </span> </p> <p class="mb-40px"> Comentezi folosind contul tău Twitter. <span class="comment-form-log-out"> (&nbsp;<a href="javascript:HighlanderComments.doExternalLogout( \'twitter\' );">Dezautentificare</a>&nbsp;/&nbsp; <a href="#" onclick="javascript:HighlanderComments.switchAccount();return false;">Schimbă</a>&nbsp;) </span> </p> <p class="mb-40px"> Comentezi folosind contul tău Facebook. <span class="comment-form-log-out"> (&nbsp;<a href="javascript:HighlanderComments.doExternalLogout( \'facebook\' );">Dezautentificare</a>&nbsp;/&nbsp; <a href="#" onclick="javascript:HighlanderComments.switchAccount();return false;">Schimbă</a>&nbsp;) </span> </p> <p class="mb-40px">Foarte frumos lucru</p> <p class="mb-40px">I love cars</p>'; $subst = ""; $result = preg_replace($re, $subst, $str); echo "The result of the substitution is ".$result;

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 PHP, please visit: http://php.net/manual/en/ref.pcre.php