Custom Search

Logiclabz

Type the URL who's output string would be matched with given regular expression pattern
Else give a Input String to match with given regex pattern
Wait till the response result to appear.

Character Classes or Character Sets

The following expressions will match single characters.

Pattern	Description
.	Matches any character excluding newline.
[abc]	A Square bracket expression matches any character (with no specific order) that is contained within the brackets.
[^abc]	Matches all characters not contained within the square brackets.
[a-z] or [0-9]	Matches any single character in the range from first to last.
\w	Matches an alpha-numeric character (a-z, A-Z, 0-9, and underscore).
\W	The opposite of \w. Matches any non-alphanumeric character.
\d	Matches a decimal character (0-9).
\D	The opposite of \d. Matches any non-decimal character.
\s	Matches a character of whitespace (space, tab, carriage return, line feed).
\S	The opposite of \s. Matches any non-whitespace character.
\r	Matches a carriage return.
\n	Matches a new line (line feed).
\f	Matches a form feed.
\t	Matches a tab.
\v	Matches a vertical tab.
\a	Matches a bell character.
\b	In a character class, matches a backspace.
\e	Matches an escape.
\	In front of any of the special characters (. $ ^ { [ ( \| ) * + ? \), ex. \. would match dot character.

The following expressions specify the location to search for a match, but do not match anything themselves.

Pattern	Description
^	The match must start at the beginning of the string (or beginning of the line in multiline mode).
$	The match must occur at the end of the string or before \n at the end of the string (or end of the line in multiline mode).
\A	The match must occur at the start of the string.
\Z	The match must occur at the end of the string or before \n at the end of the string.
\z	The match must occur at the end of the string.
\G	The match must occur at the point where the previous match ended.
\b	Asserts a boundary between word and non-word characters.
\B	The opposite of \b. Asserts a location that is not a boundary between word and non-word characters.
(?=pattern)	Asserts that the specified pattern exists immediately after this location. Known as a positive lookahead.
(?!pattern)	Asserts that the specified pattern does not exist immediately after this location. Known as a negative lookahead.
(?<=pattern)	Asserts that the specified pattern exists immediately before this location. Known as a positive lookbehind.
(?<!pattern)	Asserts that the specified pattern does not exist immediately before this location. Known as a negative lookbehind.

The following expressions will indicate a repetition of the previous character or group.

Pattern	Description
?	Repeat 0 or 1 time matching as many times as possible.
*	Repeat 0 or more times matching as many times as possible.
+	Repeat 1 or more times matching as many times as possible.
??	Repeat 0 times or 1 time matching 0 times if possible.
*?	Repeat 0 or more times matching as few times as possible.
+?	Repeat 1 or more times matching as few times as possible.
{n}	Repeat exactly n times.
{n,}	Repeat at least n times, matching as many times as possible.
{n,}?	Repeat at least n times, matching as few times as possible.
{n,m}	Repeat at least n times, but no more than m times.
{n,m}?	Repeat at least n times, but no more than m times while matching as few as possible.

The following expressions allow grouped matching.

Pattern	Description
(pattern)	Captures the specified pattern as a group. Each group is numbered automatically starting from 1. Group 0 is actually not a group at all but refers to the text matched by the entire regular expression.
(?pattern)	Captures the specified pattern into the specified group name. The string used for the name must not contain any punctuation and cannot begin with a number.
(?pattern)	Defines a balancing group definition.
(?:pattern)	Does not capture the substring matched by this pattern. Known as a noncapturing group.
(?imnsx-imnsx:pattern)	Applies or disables the specified options within subexpression. For more information, see .NET's Regular Expression Options.
(?>pattern)	Nonbacktracking (or "greedy") subexpression.

A backreference allows a previously matched subexpression to be identified subsequently in the same regular expression.

Pattern	Description
\number	Backreference. Matches the value of a numbered subexpression.
\k	Named backreference. Matches the value of a named expression.

Substititions are allowed only within replacement patterns.

Pattern	Description
$number	Substitutes the last substring matched by the specified group number. The numbering scheme for groups starts at 1 (0 represents the entire match).
${name}	Substitutes the last substring matched by a named group.
$&	Substitutes a copy of the entire match itself.
$`	Substitutes all the text of the input string before the match.
$'	Substitutes all the text of the input string after the match.
$+	Substitutes the last group captured.
$_	Substitutes the entire input string.

The following expressions allow either/or matching.

Pattern	Description
\|	Acts as a logical OR. When between two characters or groups, matches one or the other.
(?(pattern)yes\|no)	Matches the first pattern in the OR statement (yes) if the specified pattern is found at this point. Otherwise, matches the second pattern in the OR statement (no).
(?()yes\|no)	Matches the first pattern in the OR statement (yes) if the specified named group is found at this point. Otherwise, matches the second pattern in the OR statement (no).