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
  • Match everything enclosed
    (?:...)
  • Capture everything enclosed
    (...)
  • 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

/
/
gim

Test String

Substitution

Processing...

Code Generator

Language

Generated Code

$re = '/([^\t\n]+?)[\t]/im'; $str = '*Client Number *Lease Code *Suite# Suite Active Flag Space ID Space Type Class Type *Space Start Date *Space End Date Lease Code To Sublet From Sublet Start Sublet End Natural BP Percent Rent Type Lease Year Defined Lease YE Month Sales YE Month Paid In Month Paid In Days Partial Year Included Interim Report Notice Int Notice Ann Billing Cycle Percent Rent Notes Percent Rent Doc Name Percent Rent Page Number Percent Rent Sec Number Offset LL Cost Notes LL Cost Doc Name LL Cost Page Number LL Cost Sec Number Tenant TI Tenant Improvements Allowances Commissions IC Amount OC Broker OC Commissions OC Amount Active Flag Profile ID Headcount Capacity Headcount Actual Percent Rent UDF1 Percent Rent UDF2 Percent Rent UDF3 Percent Rent UDF4 Percent Rent UDF5 Suite Square Footage Sub Suite Index 201700 10471 0827 07/01/2012 06/30/2019 Y 8 0 123 201700 10471 0842 07/01/2012 06/30/2019 Y 8 0 124 201700 10471 0827 07/01/2012 06/30/2019 Y 8 0 123 '; $subst = "\"$1\"\t"; $result = preg_replace($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