Regular Expressions 101

Save & Share

  • Regex Version: ver. 1
  • Update Regex
    ctrl+⇧+s
  • Save new Regex
    ctrl+s
  • Add to Community Library

Flavor

  • PCRE2 (PHP >=7.3)
  • PCRE (PHP <7.3)
  • ECMAScript (JavaScript)
  • Python
  • Golang
  • Java 8
  • .NET 7.0 (C#)
  • Rust
  • Regex Flavor Guide

Function

  • Match
  • Substitution
  • List
  • Unit Tests

Tools

Sponsors
There are currently no sponsors. Become a sponsor today!
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

/
/
mg

Test String

Code Generator

Language

Generated Code

$re = '/(?:[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+(?:\.[a-z0-9!#$%&\'*+\/=?^_`{|}~-]+)*|"(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21\x23-\x5b\x5d-\x7f]|\\\\[\x01-\x09\x0b\x0c\x0e-\x7f])*")@(?:(?:[a-z0-9](?:[a-z0-9-]*[a-z0-9])?\.)+[a-z0-9](?:[a-z0-9-]*[a-z0-9])?|\[(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?|[a-z0-9-]*[a-z0-9]:(?:[\x01-\x08\x0b\x0c\x0e-\x1f\x21-\x5a\x53-\x7f]|\\\\[\x01-\x09\x0b\x0c\x0e-\x7f])+)\])/m'; $str = '{"_id":{"$oid":"572a5b82ae5174d3c4177d6b"},"email":"dj292023@gmail.com","gender":"F","zip":"29203","state":"SC","city":"Columbia","address1":"5137 LINDELLA ST","last_name":"Jones","first_name":"Debra","updatedAt":{"$date":"2016-09-28T12:17:21.610Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:37.860Z"},"job":"Cashier"} {"_id":{"$oid":"572a5b82ae5174d3c4177d6c"},"email":"killaswag2345@gmail.com","updatedAt":{"$date":"2016-05-04T20:28:38.123Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:38.123Z"}} {"_id":{"$oid":"572a5b83ae5174d3c4177d6d"},"email":"crandall656@gmail.com","gender":"M","last_name":"Crandall","first_name":"Andrew","updatedAt":{"$date":"2016-09-20T02:28:58.710Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:39.175Z"},"zip":"37738","state":"TN","city":"Gatlinburg","address1":"1048 LANCEWOOD DR"} {"_id":{"$oid":"572a5b85ae5174d3c4177d6e"},"email":"bre7117@gmail.com","gender":"F","zip":"75962","state":"TX","city":"NACOGDOCHES","address1":"19942 CRESTED HILL","last_name":"HEARD","first_name":"BRIANA","updatedAt":{"$date":"2016-08-30T11:02:57.810Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:40.650Z"},"job":"membership sales associate"} {"_id":{"$oid":"572a5b85ae5174d3c4177d6f"},"email":"35ellie@gmail.com","zip":"83402","state":"ID","city":"EAGLE ROCK","address1":"416N 3900E","last_name":"STAUFFER","first_name":"ELLIZABETH","updatedAt":{"$date":"2016-05-04T20:28:41.218Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:41.218Z"}} {"_id":{"$oid":"572a5b7992338558326a9355"},"updatedAt":{"$date":"2016-05-30T13:44:05.943Z"},"createdAt":{"$date":"2016-05-04T20:28:41.745Z"},"email":"silshadow@yahoo.com","ip":"76.2.67.68","first_name":"Del","last_name":"Soltis","address1":"","city":"","state":"","zip":"44417","phone":"","dob":"","inAccountName":"IA_EDU1","__v":0} {"_id":{"$oid":"572a5b86ae5174d3c4177d70"},"email":"travistalbert645@yahoo.com","gender":"M","zip":"20001","state":"DC","city":"WASHINGTON","address1":"1703 2ND ST NW","last_name":"TALBERT","first_name":"TRAVIS","updatedAt":{"$date":"2016-09-21T14:56:31.811Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:42.103Z"},"job":"Inventory Stocker"} {"_id":{"$oid":"572a5b7a92338558326a9358"},"updatedAt":{"$date":"2016-05-04T20:28:42.508Z"},"createdAt":{"$date":"2016-05-04T20:28:42.508Z"},"email":"mark_88_11@yahoo.com","ip":"174.124.192.43","first_name":"Mark","last_name":"Jenkins","address1":"","city":"","state":"","zip":"","phone":"","dob":"","inAccountName":"IA_EDU1","__v":0} {"_id":{"$oid":"572a5b7b741c393b3257df25"},"updatedAt":{"$date":"2016-05-04T20:28:43.109Z"},"createdAt":{"$date":"2016-05-04T20:28:43.109Z"},"first_name":"Oliver","last_name":"Dawanda","zip":"28012","email":"dawanda28@yahoo.com","ip":"127.0.0.1","inAccountName":"MPM_EDU2","gender":"M","__v":0} {"_id":{"$oid":"572a5b88ae5174d3c4177d71"},"email":"greene015@gmail.com","gender":"M","zip":"33102","state":"FL","city":"MIAMI","address1":"995 MASON TURNER RD","last_name":"GREENE","first_name":"JOHNATHAN","updatedAt":{"$date":"2016-05-11T08:30:22.287Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:43.620Z"},"job":"Warehouse"} {"_id":{"$oid":"572a5b88ae5174d3c4177d72"},"email":"kadance30@gmail.com","gender":"M","zip":"27536","state":"NC","city":"HENDERSON","address1":"357 SOUTHALL ST","last_name":"MARROW","first_name":"QUENTIN","updatedAt":{"$date":"2016-05-04T20:32:29.702Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:44.404Z"}} {"_id":{"$oid":"572a5b89ae5174d3c4177d73"},"email":"kanalou76@gmail.com","zip":"37217","state":"TN","city":"Nashville-Davidson metropolitan gove","address1":"491 millwood dr","last_name":"kane","first_name":"alassane","updatedAt":{"$date":"2016-06-18T06:47:00.719Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:44.790Z"}} {"_id":{"$oid":"572a5b89ae5174d3c4177d74"},"email":"gereperez1040@gmail.com","zip":"78574","state":"TX","city":"Mission","address1":"6001 Elise Dr.","last_name":"Perez","first_name":"Geremias","updatedAt":{"$date":"2016-08-11T20:32:52.988Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:45.033Z"},"job":"Sales","dob":"10-17-1996","gender":"M","phone":"9566413280"} {"_id":{"$oid":"572a5b89ae5174d3c4177d75"},"email":"cayman64@hotmail.com","gender":"M","zip":"29323","state":"SC","city":"CHESNEE","last_name":"ROBINSON","first_name":"DEBBIE","updatedAt":{"$date":"2016-07-13T01:03:34.129Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:45.189Z"},"address1":"1058 BUCK CREEK RD","job":"Marketing","dob":"5/25/1951","phone":"8644617766"} {"_id":{"$oid":"572a5b89ae5174d3c4177d76"},"email":"shataviasadler@gmail.com","zip":"77084","state":"TX","city":"HOUSTON","address1":"1227 HELMS RD","last_name":"SADLER","first_name":"SHATAVIA","updatedAt":{"$date":"2016-05-23T20:13:19.725Z"},"__v":0,"createdAt":{"$date":"2016-05-04T20:28:45.227Z"}} {"_id":{"$oid":"572a5b7dac39fe75320e5f83"},"updatedAt":{"$date":"2016-06-18T18:54:49.336Z"},"createdAt":{"$date":"2016-05-04T20:28:45.299Z"},"email":"hwatso@aol.com","ip":"65.15.99.190","first_name":"Joyce","last_name":"Watson","city":"TERRY","state":"MS","zip":"39170","inAccountName":"R3I_FYDN","gender":"F","__v":0} {"_id":{"$oid":"572a5b7d741c393b3257df2c"},"updatedAt":{"$date":"2016-05-04T20:28:45.496Z"},"createdAt":{"$date":"2016-05-04T20:28:45.496Z"},"email":"staciechess@yahoo.com","ip":"107.77.106.92","first_name":"Stacie","last_name":"CHESS","city":"Meadville","state":"PA","zip":"16335","inAccountName":"R3I_FYDN","gender":"F","__v":0} {"_id":{"$oid":"572a5b7d92338558326a9361"},"updatedAt":{"$date":"2016-05-27T12:34:51.274Z"},"createdAt":{"$date":"2016-05-04T20:28:45.700Z"},"email":"robert.siler@att.net","ip":"108.89.195.49","first_name":"Robert","last_name":"Siler","city":"Cypress","state":"CA","zip":"90630","inAccountName":"R3I_FYDN","gender":"M","__v":0}'; preg_match_all($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