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 = '~(?:\h*<!-- ARTICOL START -->\R|\G)\K(?:(<p class=.*?</p>\R?)|(?:(?!<p class=.*?</p>)[\s\S])+)(?=[\s\S]+<!-- ARTICOL FINAL -->)~m'; $str = ' <!-- ARTICOL START --> <div align="justify"> <table width="682" border="0"> <tr> <td><h1 class="den_articol" itemprop="sfe">My text here</h1></td> </tr> <tr> <td class="text_dreapta">On Ianuarie 14, 2014, in <a href="https://neculaifantanaru.com/en/qualities-of-a-leader.html" title="See al articles from Qualities of a leader" class="external" rel="category tag">Qualities of a leader</a>, by Author</td> </tr> </table> <h2 class="text_obisnuit2"><img src="index_files/sfa.jpg" width="718" height="605" id="sfs" usemap="#m_dgrnt" alt="hip" /><map name="tfAbonament" id="m_34"> <area shape="rect" coords="259,545,457,582" href="#plata" alt="" /> </map></h2> <p class="den_articol">Why this text text?</p> <p class="text_obisnuit">test text text</p> <p class="text_obisnuit">test text text</p> <p class="text_obisnuit2">test text text</p> </div> <p align="justify" class="text_obisnuit style3">&nbsp;</p> <!-- ARTICOL FINAL -->'; $subst = "$1"; $result = preg_replace($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