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

r"
"
g

Test String

Code Generator

Language

Generated Code

$re = '/(?:[M|m](?:edical|EDICAL|rn|RN|r|R)|[P|p](?:atient|ATIENT))(?:\s+(?:record|Record|RECORD))?(?:\s+(?:id|identification|name|no|number|Id|Identification|Name|No|Number|ID|IDENTIFICATION|NAME|NO|NUMBER))?(?:[\s#]*)?0(?!0{7})\d{7}\b|\b0(?!0{7})\d{7}\s*(?:[M|m](?:edical|EDICAL|r|R|rn|RN)|[P|p](?:atient|ATIENT))(?:\s+(?:record|Record|RECORD))?(?:\s+(?:id|name|no|number|Id|Name|No|Number|ID|NAME|NO|NUMBER))?\b/'; $str = '00000000 GIBBERIGH 00000000 Gibberigh 00000000 ME 00000000 MEDICAL 00000000 MEDICAL NUMBER 00000000 MEDICAL RECORD NUMBER 00000000 MR # 00000000 MR# 00000000 MRN 00000000 MRN # 00000000 MRN# 00000000 MRO 00000000 Me 00000000 Medical 00000000 Medical number 00000000 Medical record number 00000000 Mr # 00000000 Mr# 00000000 Mrn 00000000 Mrn # 00000000 Mrn# 00000000 Mro 00000000 PATIENT ID 00000000 PATIENT IDENTIFICATION 00000000 PATIENT NAME 00000000 PATIENT NO 00000000 PATIENT NUMBER 00000000 Patient id 00000000 Patient identification 00000000 Patient name 00000000 Patient no 00000000 Patient number 00000000 gibberigh 00000000 me 00000000 medical 00000000 medical number 00000000 medical record number 00000000 mr # 00000000 mr# 00000000 mrn 00000000 mrn # 00000000 mrn# 00000000 mro 00000000 patient id 00000000 patient identification 00000000 patient name 00000000 patient no 00000000 patient number 00000000GIBBERIGH 00000000Gibberigh 00000000ME 00000000MEDICAL 00000000MEDICAL NUMBER 00000000MEDICAL RECORD NUMBER 00000000MR # 00000000MR# 00000000MRN 00000000MRN # 00000000MRN# 00000000MRO 00000000Me 00000000Medical 00000000Medical number 00000000Medical record number 00000000Mr # 00000000Mr# 00000000Mrn 00000000Mrn # 00000000Mrn# 00000000Mro 00000000PATIENT ID 00000000PATIENT IDENTIFICATION 00000000PATIENT NAME 00000000PATIENT NO 00000000PATIENT NUMBER 00000000Patient id 00000000Patient identification 00000000Patient name 00000000Patient no 00000000Patient number 00000000gibberigh 00000000me 00000000medical 00000000medical number 00000000medical record number 00000000mr # 00000000mr# 00000000mrn 00000000mrn # 00000000mrn# 00000000mro 00000000patient id 00000000patient identification 00000000patient name 00000000patient no 00000000patient number 00012345 GIBBERIGH 00012345 Gibberigh 00012345 ME 00012345 MEDICAL 00012345 MEDICAL NUMBER 00012345 MEDICAL RECORD NUMBER 00012345 MR # 00012345 MR# 00012345 MRN 00012345 MRN # 00012345 MRN# 00012345 MRO 00012345 Me 00012345 Medical 00012345 Medical number 00012345 Medical record number 00012345 Mr # 00012345 Mr# 00012345 Mrn 00012345 Mrn # 00012345 Mrn# 00012345 Mro 00012345 PATIENT ID 00012345 PATIENT IDENTIFICATION 00012345 PATIENT NAME 00012345 PATIENT NO 00012345 PATIENT NUMBER 00012345 Patient id 00012345 Patient identification 00012345 Patient name 00012345 Patient no 00012345 Patient number 00012345 gibberigh 00012345 me 00012345 medical 00012345 medical number 00012345 medical record number 00012345 mr # 00012345 mr# 00012345 mrn 00012345 mrn # 00012345 mrn# 00012345 mro 00012345 patient id 00012345 patient identification 00012345 patient name 00012345 patient no 00012345 patient number 00012345GIBBERIGH 00012345Gibberigh 00012345ME 00012345MEDICAL 00012345MEDICAL NUMBER 00012345MEDICAL RECORD NUMBER 00012345MR # 00012345MR# 00012345MRN 00012345MRN # 00012345MRN# 00012345MRO 00012345Me 00012345Medical 00012345Medical number 00012345Medical record number 00012345Mr # 00012345Mr# 00012345Mrn 00012345Mrn # 00012345Mrn# 00012345Mro 00012345PATIENT ID 00012345PATIENT IDENTIFICATION 00012345PATIENT NAME 00012345PATIENT NO 00012345PATIENT NUMBER 00012345Patient id 00012345Patient identification 00012345Patient name 00012345Patient no 00012345Patient number 00012345gibberigh 00012345me 00012345medical 00012345medical number 00012345medical record number 00012345mr # 00012345mr# 00012345mrn 00012345mrn # 00012345mrn# 00012345mro 00012345patient id 00012345patient identification 00012345patient name 00012345patient no 00012345patient number 00123456 GIBBERIGH 00123456 Gibberigh 00123456 ME 00123456 MEDICAL 00123456 MEDICAL NUMBER 00123456 MEDICAL RECORD NUMBER 00123456 MR # 00123456 MR# 00123456 MRN 00123456 MRN # 00123456 MRN# 00123456 MRO 00123456 Me 00123456 Medical 00123456 Medical number 00123456 Medical record number 00123456 Mr # 00123456 Mr# 00123456 Mrn 00123456 Mrn # 00123456 Mrn# 00123456 Mro 00123456 PATIENT ID 00123456 PATIENT IDENTIFICATION 00123456 PATIENT NAME 00123456 PATIENT NO 00123456 PATIENT NUMBER 00123456 Patient id 00123456 Patient identification 00123456 Patient name 00123456 Patient no 00123456 Patient number 00123456 gibberigh 00123456 me 00123456 medical 00123456 medical number 00123456 medical record number 00123456 mr # 00123456 mr# 00123456 mrn 00123456 mrn # 00123456 mrn# 00123456 mro 00123456 patient id 00123456 patient identification 00123456 patient name 00123456 patient no 00123456 patient number 00123456GIBBERIGH 00123456Gibberigh 00123456ME 00123456MEDICAL 00123456MEDICAL NUMBER 00123456MEDICAL RECORD NUMBER 00123456MR # 00123456MR# 00123456MRN 00123456MRN # 00123456MRN# 00123456MRO 00123456Me 00123456Medical 00123456Medical number 00123456Medical record number 00123456Mr # 00123456Mr# 00123456Mrn 00123456Mrn # 00123456Mrn# 00123456Mro 00123456PATIENT ID 00123456PATIENT IDENTIFICATION 00123456PATIENT NAME 00123456PATIENT NO 00123456PATIENT NUMBER 00123456Patient id 00123456Patient identification 00123456Patient name 00123456Patient no 00123456Patient number 00123456gibberigh 00123456me 00123456medical 00123456medical number 00123456medical record number 00123456mr # 00123456mr# 00123456mrn 00123456mrn # 00123456mrn# 00123456mro 00123456patient id 00123456patient identification 00123456patient name 00123456patient no 00123456patient number 01234567 GIBBERIGH 01234567 Gibberigh 01234567 ME 01234567 MEDICAL 01234567 MEDICAL NUMBER 01234567 MEDICAL RECORD NUMBER 01234567 MR # 01234567 MR# 01234567 MRN 01234567 MRN # 01234567 MRN# 01234567 MRO 01234567 Me 01234567 Medical 01234567 Medical number 01234567 Medical record number 01234567 Mr # 01234567 Mr# 01234567 Mrn 01234567 Mrn # 01234567 Mrn# 01234567 Mro 01234567 PATIENT ID 01234567 PATIENT IDENTIFICATION 01234567 PATIENT NAME 01234567 PATIENT NO 01234567 PATIENT NUMBER 01234567 Patient id 01234567 Patient identification 01234567 Patient name 01234567 Patient no 01234567 Patient number 01234567 gibberigh 01234567 me 01234567 medical 01234567 medical number 01234567 medical record number 01234567 mr # 01234567 mr# 01234567 mrn 01234567 mrn # 01234567 mrn# 01234567 mro 01234567 patient id 01234567 patient identification 01234567 patient name 01234567 patient no 01234567 patient number 01234567GIBBERIGH 01234567Gibberigh 01234567ME 01234567MEDICAL 01234567MEDICAL NUMBER 01234567MEDICAL RECORD NUMBER 01234567MR # 01234567MR# 01234567MRN 01234567MRN # 01234567MRN# 01234567MRO 01234567Me 01234567Medical 01234567Medical number 01234567Medical record number 01234567Mr # 01234567Mr# 01234567Mrn 01234567Mrn # 01234567Mrn# 01234567Mro 01234567PATIENT ID 01234567PATIENT IDENTIFICATION 01234567PATIENT NAME 01234567PATIENT NO 01234567PATIENT NUMBER 01234567Patient id 01234567Patient identification 01234567Patient name 01234567Patient no 01234567Patient number 01234567gibberigh 01234567me 01234567medical 01234567medical number 01234567medical record number 01234567mr # 01234567mr# 01234567mrn 01234567mrn # 01234567mrn# 01234567mro 01234567patient id 01234567patient identification 01234567patient name 01234567patient no 01234567patient number 12345678 GIBBERIGH 12345678 Gibberigh 12345678 ME 12345678 MEDICAL 12345678 MEDICAL NUMBER 12345678 MEDICAL RECORD NUMBER 12345678 MR # 12345678 MR# 12345678 MRN 12345678 MRN # 12345678 MRN# 12345678 MRO 12345678 Me 12345678 Medical 12345678 Medical number 12345678 Medical record number 12345678 Mr # 12345678 Mr# 12345678 Mrn 12345678 Mrn # 12345678 Mrn# 12345678 Mro 12345678 PATIENT ID 12345678 PATIENT IDENTIFICATION 12345678 PATIENT NAME 12345678 PATIENT NO 12345678 PATIENT NUMBER 12345678 Patient id 12345678 Patient identification 12345678 Patient name 12345678 Patient no 12345678 Patient number 12345678 gibberigh 12345678 me 12345678 medical 12345678 medical number 12345678 medical record number 12345678 mr # 12345678 mr# 12345678 mrn 12345678 mrn # 12345678 mrn# 12345678 mro 12345678 patient id 12345678 patient identification 12345678 patient name 12345678 patient no 12345678 patient number 12345678GIBBERIGH 12345678Gibberigh 12345678ME 12345678MEDICAL 12345678MEDICAL NUMBER 12345678MEDICAL RECORD NUMBER 12345678MR # 12345678MR# 12345678MRN 12345678MRN # 12345678MRN# 12345678MRO 12345678Me 12345678Medical 12345678Medical number 12345678Medical record number 12345678Mr # 12345678Mr# 12345678Mrn 12345678Mrn # 12345678Mrn# 12345678Mro 12345678PATIENT ID 12345678PATIENT IDENTIFICATION 12345678PATIENT NAME 12345678PATIENT NO 12345678PATIENT NUMBER 12345678Patient id 12345678Patient identification 12345678Patient name 12345678Patient no 12345678Patient number 12345678gibberigh 12345678me 12345678medical 12345678medical number 12345678medical record number 12345678mr # 12345678mr# 12345678mrn 12345678mrn # 12345678mrn# 12345678mro 12345678patient id 12345678patient identification 12345678patient name 12345678patient no 12345678patient number GIBBERIGH 00000000 GIBBERIGH 00012345 GIBBERIGH 00123456 GIBBERIGH 01234567 GIBBERIGH 12345678 GIBBERIGH00000000 GIBBERIGH00012345 GIBBERIGH00123456 GIBBERIGH01234567 GIBBERIGH12345678 Gibberigh 00000000 Gibberigh 00012345 Gibberigh 00123456 Gibberigh 01234567 Gibberigh 12345678 Gibberigh00000000 Gibberigh00012345 Gibberigh00123456 Gibberigh01234567 Gibberigh12345678 ME 00000000 ME 00012345 ME 00123456 ME 01234567 ME 12345678 ME00000000 ME00012345 ME00123456 ME01234567 ME12345678 MEDICAL 00000000 MEDICAL 00012345 MEDICAL 00123456 MEDICAL 01234567 MEDICAL 12345678 MEDICAL NUMBER 00000000 MEDICAL NUMBER 00012345 MEDICAL NUMBER 00123456 MEDICAL NUMBER 01234567 MEDICAL NUMBER 12345678 MEDICAL NUMBER00000000 MEDICAL NUMBER00012345 MEDICAL NUMBER00123456 MEDICAL NUMBER01234567 MEDICAL NUMBER12345678 MEDICAL RECORD NUMBER 00000000 MEDICAL RECORD NUMBER 00012345 MEDICAL RECORD NUMBER 00123456 MEDICAL RECORD NUMBER 01234567 MEDICAL RECORD NUMBER 12345678 MEDICAL RECORD NUMBER00000000 MEDICAL RECORD NUMBER00012345 MEDICAL RECORD NUMBER00123456 MEDICAL RECORD NUMBER01234567 MEDICAL RECORD NUMBER12345678 MEDICAL00000000 MEDICAL00012345 MEDICAL00123456 MEDICAL01234567 MEDICAL12345678 MR # 00000000 MR # 00012345 MR # 00123456 MR # 01234567 MR # 12345678 MR #00000000 MR #00012345 MR #00123456 MR #01234567 MR #12345678 MR# 00000000 MR# 00012345 MR# 00123456 MR# 01234567 MR# 12345678 MR#00000000 MR#00012345 MR#00123456 MR#01234567 MR#12345678 MRN # 00000000 MRN # 00012345 MRN # 00123456 MRN # 01234567 MRN # 12345678 MRN #00000000 MRN #00012345 MRN #00123456 MRN #01234567 MRN #12345678 MRN 00000000 MRN 00012345 MRN 00123456 MRN 01234567 MRN 12345678 MRN# 00000000 MRN# 00012345 MRN# 00123456 MRN# 01234567 MRN# 12345678 MRN#00000000 MRN#00012345 MRN#00123456 MRN#01234567 MRN#12345678 MRN00000000 MRN00012345 MRN00123456 MRN01234567 MRN12345678 MRO 00000000 MRO 00012345 MRO 00123456 MRO 01234567 MRO 12345678 MRO00000000 MRO00012345 MRO00123456 MRO01234567 MRO12345678 Me 00000000 Me 00012345 Me 00123456 Me 01234567 Me 12345678 Me00000000 Me00012345 Me00123456 Me01234567 Me12345678 Medical 00000000 Medical 00012345 Medical 00123456 Medical 01234567 Medical 12345678 Medical number 00000000 Medical number 00012345 Medical number 00123456 Medical number 01234567 Medical number 12345678 Medical number00000000 Medical number00012345 Medical number00123456 Medical number01234567 Medical number12345678 Medical record number 00000000 Medical record number 00012345 Medical record number 00123456 Medical record number 01234567 Medical record number 12345678 Medical record number00000000 Medical record number00012345 Medical record number00123456 Medical record number01234567 Medical record number12345678 Medical00000000 Medical00012345 Medical00123456 Medical01234567 Medical12345678 Mr # 00000000 Mr # 00012345 Mr # 00123456 Mr # 01234567 Mr # 12345678 Mr #00000000 Mr #00012345 Mr #00123456 Mr #01234567 Mr #12345678 Mr# 00000000 Mr# 00012345 Mr# 00123456 Mr# 01234567 Mr# 12345678 Mr#00000000 Mr#00012345 Mr#00123456 Mr#01234567 Mr#12345678 Mrn # 00000000 Mrn # 00012345 Mrn # 00123456 Mrn # 01234567 Mrn # 12345678 Mrn #00000000 Mrn #00012345 Mrn #00123456 Mrn #01234567 Mrn #12345678 Mrn 00000000 Mrn 00012345 Mrn 00123456 Mrn 01234567 Mrn 12345678 Mrn# 00000000 Mrn# 00012345 Mrn# 00123456 Mrn# 01234567 Mrn# 12345678 Mrn#00000000 Mrn#00012345 Mrn#00123456 Mrn#01234567 Mrn#12345678 Mrn00000000 Mrn00012345 Mrn00123456 Mrn01234567 Mrn12345678 Mro 00000000 Mro 00012345 Mro 00123456 Mro 01234567 Mro 12345678 Mro00000000 Mro00012345 Mro00123456 Mro01234567 Mro12345678 PATIENT ID 00000000 PATIENT ID 00012345 PATIENT ID 00123456 PATIENT ID 01234567 PATIENT ID 12345678 PATIENT ID00000000 PATIENT ID00012345 PATIENT ID00123456 PATIENT ID01234567 PATIENT ID12345678 PATIENT IDENTIFICATION 00000000 PATIENT IDENTIFICATION 00012345 PATIENT IDENTIFICATION 00123456 PATIENT IDENTIFICATION 01234567 PATIENT IDENTIFICATION 12345678 PATIENT IDENTIFICATION00000000 PATIENT IDENTIFICATION00012345 PATIENT IDENTIFICATION00123456 PATIENT IDENTIFICATION01234567 PATIENT IDENTIFICATION12345678 PATIENT NAME 00000000 PATIENT NAME 00012345 PATIENT NAME 00123456 PATIENT NAME 01234567 PATIENT NAME 12345678 PATIENT NAME00000000 PATIENT NAME00012345 PATIENT NAME00123456 PATIENT NAME01234567 PATIENT NAME12345678 PATIENT NO 00000000 PATIENT NO 00012345 PATIENT NO 00123456 PATIENT NO 01234567 PATIENT NO 12345678 PATIENT NO00000000 PATIENT NO00012345 PATIENT NO00123456 PATIENT NO01234567 PATIENT NO12345678 PATIENT NUMBER 00000000 PATIENT NUMBER 00012345 PATIENT NUMBER 00123456 PATIENT NUMBER 01234567 PATIENT NUMBER 12345678 PATIENT NUMBER00000000 PATIENT NUMBER00012345 PATIENT NUMBER00123456 PATIENT NUMBER01234567 PATIENT NUMBER12345678 Patient id 00000000 Patient id 00012345 Patient id 00123456 Patient id 01234567 Patient id 12345678 Patient id00000000 Patient id00012345 Patient id00123456 Patient id01234567 Patient id12345678 Patient identification 00000000 Patient identification 00012345 Patient identification 00123456 Patient identification 01234567 Patient identification 12345678 Patient identification00000000 Patient identification00012345 Patient identification00123456 Patient identification01234567 Patient identification12345678 Patient name 00000000 Patient name 00012345 Patient name 00123456 Patient name 01234567 Patient name 12345678 Patient name00000000 Patient name00012345 Patient name00123456 Patient name01234567 Patient name12345678 Patient no 00000000 Patient no 00012345 Patient no 00123456 Patient no 01234567 Patient no 12345678 Patient no00000000 Patient no00012345 Patient no00123456 Patient no01234567 Patient no12345678 Patient number 00000000 Patient number 00012345 Patient number 00123456 Patient number 01234567 Patient number 12345678 Patient number00000000 Patient number00012345 Patient number00123456 Patient number01234567 Patient number12345678 gibberigh 00000000 gibberigh 00012345 gibberigh 00123456 gibberigh 01234567 gibberigh 12345678 gibberigh00000000 gibberigh00012345 gibberigh00123456 gibberigh01234567 gibberigh12345678 me 00000000 me 00012345 me 00123456 me 01234567 me 12345678 me00000000 me00012345 me00123456 me01234567 me12345678 medical 00000000 medical 00012345 medical 00123456 medical 01234567 medical 12345678 medical number 00000000 medical number 00012345 medical number 00123456 medical number 01234567 medical number 12345678 medical number00000000 medical number00012345 medical number00123456 medical number01234567 medical number12345678 medical record number 00000000 medical record number 00012345 medical record number 00123456 medical record number 01234567 medical record number 12345678 medical record number00000000 medical record number00012345 medical record number00123456 medical record number01234567 medical record number12345678 medical00000000 medical00012345 medical00123456 medical01234567 medical12345678 mr # 00000000 mr # 00012345 mr # 00123456 mr # 01234567 mr # 12345678 mr #00000000 mr #00012345 mr #00123456 mr #01234567 mr #12345678 mr# 00000000 mr# 00012345 mr# 00123456 mr# 01234567 mr# 12345678 mr#00000000 mr#00012345 mr#00123456 mr#01234567 mr#12345678 mrn # 00000000 mrn # 00012345 mrn # 00123456 mrn # 01234567 mrn # 12345678 mrn #00000000 mrn #00012345 mrn #00123456 mrn #01234567 mrn #12345678 mrn 00000000 mrn 00012345 mrn 00123456 mrn 01234567 mrn 12345678 mrn# 00000000 mrn# 00012345 mrn# 00123456 mrn# 01234567 mrn# 12345678 mrn#00000000 mrn#00012345 mrn#00123456 mrn#01234567 mrn#12345678 mrn00000000 mrn00012345 mrn00123456 mrn01234567 mrn12345678 mro 00000000 mro 00012345 mro 00123456 mro 01234567 mro 12345678 mro00000000 mro00012345 mro00123456 mro01234567 mro12345678 patient id 00000000 patient id 00012345 patient id 00123456 patient id 01234567 patient id 12345678 patient id00000000 patient id00012345 patient id00123456 patient id01234567 patient id12345678 patient identification 00000000 patient identification 00012345 patient identification 00123456 patient identification 01234567 patient identification 12345678 patient identification00000000 patient identification00012345 patient identification00123456 patient identification01234567 patient identification12345678 patient name 00000000 patient name 00012345 patient name 00123456 patient name 01234567 patient name 12345678 patient name00000000 patient name00012345 patient name00123456 patient name01234567 patient name12345678 patient no 00000000 patient no 00012345 patient no 00123456 patient no 01234567 patient no 12345678 patient no00000000 patient no00012345 patient no00123456 patient no01234567 patient no12345678 patient number 00000000 patient number 00012345 patient number 00123456 patient number 01234567 patient number 12345678 patient number00000000 patient number00012345 patient number00123456 patient number01234567 patient number12345678'; 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