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

/
/
gms

Test String

Code Generator

Language

Generated Code

$re = '/^(\s*)object\s(\w*):\sTcxRadioGroup.*?\n\1end/ms'; $str = 'object Form1: TForm1 Left = 0 Top = 0 Caption = \'Form1\' ClientHeight = 494 ClientWidth = 635 Color = clBtnFace Font.Charset = DEFAULT_CHARSET Font.Color = clWindowText Font.Height = -11 Font.Name = \'Tahoma\' Font.Style = [] OldCreateOrder = False PixelsPerInch = 96 TextHeight = 13 object cxRadioGroup1: TcxRadioGroup Left = 0 Top = 0 Align = alTop Caption = \'cxRadioGroup1\' Properties.Items = <> TabOrder = 0 ExplicitLeft = 24 ExplicitTop = 16 ExplicitWidth = 185 Height = 105 Width = 635 end object cxRadioGroup2: TcxRadioGroup Left = 0 Top = 389 Align = alBottom Properties.Items = <> TabOrder = 1 ExplicitTop = 293 Height = 105 Width = 635 end object Panel1: TPanel Left = 200 Top = 111 Width = 257 Height = 265 Caption = \'Panel1\' TabOrder = 2 object cxRadioGroup3: TcxRadioGroup Left = 8 Top = 16 Caption = \'cxRadioGroup3\' Properties.Items = <> TabOrder = 0 Height = 105 Width = 185 end object cxRadioGroup4: TcxRadioGroup Left = 8 Top = 144 Properties.Items = < item Caption = \'item 1\' end item Caption = \'item 2\' end> TabOrder = 1 Height = 105 Width = 185 end end end'; preg_match_all($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