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
No Match

/
/
gm

Test String

Code Generator

Language

Generated Code

$re = '/[13][a-km-zA-HJ-NP-Z1-9]{25,34}$/m'; $str = 'Hello! I have very bad news for you. 18/01/2019 - on this day I hacked your OS and got full access to your account user@company.com So, you can change the password, yes... But my malware intercepts it every time. How I made it: In the software of the router, through which you went online, was a vulnerability. I just hacked this router and placed my malicious code on it. When you went online, my trojan was installed on the OS of your device. After that, I made a full dump of your disk (I have all your address book, history of viewing sites, all files, phone numbers and addresses of all your contacts). A month ago, I wanted to lock your device and ask for a not big amount of btc to unlock. But I looked at the sites that you regularly visit, and I was shocked by what I saw!!! I\'m talk you about sites for adults. I want to say - you are a BIG pervert. Your fantasy is shifted far away from the normal course! And I got an idea.... I made a screenshot of the adult sites where you have fun (do you understand what it is about, huh?). After that, I made a screenshot of your joys (using the camera of your device) and glued them together. Turned out amazing! You are so spectacular! I\'m know that you would not like to show these screenshots to your friends, relatives or colleagues. I think $529 is a very, very small amount for my silence. Besides, I have been spying on you for so long, having spent a lot of time! Pay ONLY in Bitcoins! My BTC wallet: 1E39X5qQMFUuMaNRPrvqhj3mV7USwdtE3n You do not know how to use bitcoins? Enter a query in any search engine: "how to replenish btc wallet". It\'s extremely easy For this payment I give you two days (48 hours). As soon as this letter is opened, the timer will work. After payment, my virus and dirty screenshots with your enjoys will be self-destruct automatically. If I do not receive from you the specified amount, then your device will be locked, and all your contacts will receive a screenshots with your "enjoys". I hope you understand your situation. - Do not try to find and destroy my virus! (All your data, files and screenshots is already uploaded to a remote server) - Do not try to contact me (this is impossible, sender\'s address was randomly generated) - Various security services will not help you; formatting a disk or destroying a device will not help, since your data is already on a remote server. P.S. You are not my single victim. so, I guarantee you that I will not disturb you again after payment! This is the word of honor hacker I also ask you to regularly update your antiviruses in the future. This way you will no longer fall into a similar situation. Do not hold evil! I just do my job. Have a nice day! '; preg_match_all($re, $str, $matches, PREG_SET_ORDER, 0); // Print the entire match result var_dump($matches);

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