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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/
gims

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/[^0-9a-z]?(bikini|b[i|e]rah[i|e]|b[o|u]g[i|e]l|[men|di]?cabul[i]?|cialis|[dic|menc|menyu]?umbu[i]?|dildo|[ng]?ent[o|i]t|ereksi|eroti[k|c]|gay|jemb[u|e]t|judi|[c|k]ondom|kontol|kunam|lesb[o|ian]|libido|lucah|memek|[dip|pem]?erkosa|miras|penis|pepek|porno|puting|rog[o|e]l|seks|se[k|n]sual|sex]|telanjang|telugu|tetek|titit|toge[l]?|tocil|vagina|viagra|orgasm[e]?|kemaluan|k[e]?lamin|[ngen|jan]cuk)[^0-9a-z]/ims'; $str = 'persaingan dua pembalap mercedes kembali terjadi pada balapan gp formula 1 monaco. nico rosberg akhirnya sukses memutus rangkaian kemenangan rekan satu timnya, lewis hamilton yang finis di posisi kedua pada balapan yang digelar seksual seks sensual '; $subst = "###BAD###"; $result = preg_replace($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