Herramienta gratuita que valida la cadena de entrada proporcionada frente a la expresión regular ofrecida y hace coincidir la salida en virtud de la regex definida.
La herramienta admite el análisis y la depuración en lenguajes JavaScript, Python y PHP
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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 |
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 |