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

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/^\|([^\|]*\|){2}[^\s\|]/m'; $str = '| 17255|Sumner Highlands |4507 Sangamore Rd |Bethesda |20816 |177569|-77.118822124|38.948172261|2023-04-04T10:00:00|3|1| 125| 31| 0.48| 0.88| 21| 0| 0|compliant| | 17547|The Birches |1532 Heather Hollow Cir |Silver Spring |20904 |178105|-76.980971525|39.040723373|2023-04-11T10:22:48|3|1| 227| 49| 0.42| 0.34| 34| 0| 0|compliant| | 17772|Glenville Road, 8812 |8812 Glenville Rd |Silver Spring |20901 |177597|-76.997005506|39.000266646|2023-05-08T12:41:39|3|1| 4| 6| 4.83| 1.92| 0|0.33| 0|troubled | |151598|Westchester West Apartments |3020 HEWITT AVE |SILVER SPRING |20906 |178118|-77.064392607|39.079760287|2023-06-29T10:34:44|2|1| 345| 64| 2.64| 1.17| 22|0.06| 0|at-risk | |122536|Inigo\'s Crossing |5405 TUCKERMAN LN |ROCKVILLE |20852 |177638|-77.108192429|39.029109621|2023-03-30T13:53:00|3|0| 473| 109| 0.95| 1.33| 52| 0|0.03|compliant| |148419|8805 PLYMOUTH ST |8805 PLYMOUTH ST |SILVER SPRING |20901 |176723| -77.00691082| 39.00078819|2023-04-04T11:14:27|3|1| 7| 7| 0.57| 0.85| 4| 0| 0|compliant| |117270|Fairland Crossing |14001 CASTLE BLVD |SILVER SPRING |20904 |177507|-76.940498016|39.084672257|2023-06-21T10:40:07|1|1| 534| 528| 3.1| 1.74| 75| 0.1|0.02|troubled | | 17951|Prospect Street, 908 |908 PROSPECT ST |TAKOMA PARK |20912 |176677|-76.998919873|38.989544716|2023-04-04T10:29:06|1|1| 4| 4| 1.25| 0.8| 2| 0| 0|compliant| | 18024|Flower Avenue, 8511 |8511 FLOWER AVE |TAKOMA PARK |20912 |157672|-77.002600204|38.996090439|2019-09-16T09:54:44|2|0| 2| 4| 1.25| 1.35| 1| 0| 0|compliant| | 62678|Metro Pointe Apartments |11175 GEORGIA AVE |SILVER SPRING |20902 |178094|-77.050482435|39.038547192|2023-04-26T09:57:26|3|1| 173| 44| 0.27| 0.37| 36| 0| 0|compliant| |150630|Maven at Wheaton |10914 GEORGIA AVE |SILVER SPRING |20902 |177513|-77.050201943|39.035227779|2023-03-31T10:32:38|3|1| 232| 62| 0.38| 0.15| 57|0.03| 0|compliant| | 17292|Summit Hills |8484 16Th St |Silver Spring |20910 |178095| 0| 0|2023-05-23T10:28:29|3|1| 112| 269| 2.8| 1.88| 30|0.03| 0|troubled | | 17632|The Point At Germantown |2 Observation Ct |Germantown |20876 |175575| -77.24749447|39.192139826|2023-03-29T10:07:12|2|1| 218| 63| 0.85| 1.11| 28|0.03| 0|compliant| | 17200|Seneca Ridge |19568 Scenery Dr |Germantown |20876 |177536|-77.234887494|39.176871982|2023-04-13T12:36:00|3|1| 71| 58| 1.62| 1.13| 26|0.05| 0|compliant| | 62427|The Veridian At Silver Spring Metro |1133 East West Hwy |Silver Spring |20910 |178097|-77.027783253|38.989346504|2023-06-15T13:45:17|3|1| 457| 110| 0.54| 0.72| 68| 0| 0|compliant| | 88897|Avery Park Apartments |1801 Hampshire Green Ln |Silver Spring |20903 |178089|-76.973864306|39.015611161|2023-06-08T12:37:48|1|1| 294| 95| 1.75| 1.63| 10|0.07|0.01|at-risk | | 17369|Schrider Street, 8115 |8115 Schrider St |Silver Spring |20910 |178075|-77.014090876|38.991809103|2023-04-18T09:53:01|2|1| 9| 11| 3.72| 1.67| 2|0.27| 0|troubled | | 63144|Archstone Wisconsin Place |4440 Willard Ave |Chevy Chase |20815 |178103|-77.087527525|38.961768579|2023-05-25T12:15:18|3|1| 432| 102| 0.79| 2.39| 10| 0| 0|at-risk | | 17493|Kennebec Avenue, 811 |811 Kennebec Ave |Takoma Park |20912 |177580|-76.999838124|38.990228425|2023-07-14T08:44:00|3|1| 1| 1| 1| 1| 0| 0| 0|compliant| |106762|Cider Mill |18205 LOST KNIFE CIR |MONTGOMERY VILLAGE|20886 |177646|-77.203234912|39.157177534|2023-06-06T11:04:03|3|0| 861| 842| 3.56| 1.8| 86|0.13|0.05|troubled |'; $subst = "*"; $result = preg_replace($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