# SubstringRegexpDelimiter

Returns substring starting and ending by the specified regular expression delimiters

```mathematica
SubstringRegexpDelimiter("your text is here now", "[tex]", "here") → "text is here"
SubstringRegexpDelimiter("COMMAND DELETE", "[AND]", "[L]") → "AND DEL"
```

#### Inputs

`SubstringRegexpDelimiter(string, startAfterRegexp, endBeforeRegexp, [index])`

* `string` - A text value
* `startAfterRegexp` - Regular expression to start the search after
* `endBeforeRegexp` - Regular expression to end the search before
* `[index]` - **\[optional**: `0` by default\*\*]\*\*