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このツールは、JavaScript、Python、PHP言語での解析とデバッグをサポートしています

Regex Parser Flags

Following are the explanations for the flags used.

Regex Parser Flags	Description
g (Global)	Don't return after the first match
s (Dot All)	Dot also matches newline
i (Case Insensitive)	Case insensitive match, ignores case of alphabets
m (Multiline)	Causes ^ and $ to match the begin/end of each line
D (Dollar)	Makes the dollar sign '$', to always match the end of the string, instead of end of the line
x (Extended)	Spaces in the pattern are ignored
U (Ungreedy)	The match becomes lazy by default

Regex Parser Examples

Following are few example input regex and results for the sample input string

InputRegex	Description	Input string	Result
[A-Z]	Character class: Literally matches all characters given inside '[' ']'	Once upon A time There was a King with Seven sons
[A-Za-z]+	Checks for one or more matches	Once upon A time
([A-Z])	Capturing group: Captures the matches of pattern within '(' and ')' in separate groups	Once upon A time
\w	Matches any word character (similar to [a-zA-Z0-9_])	Site
([A-Z])\w+	Capture all groups starting with uppercase alphabet and match all words starting with upper case alphabet followed by word character	Once