# DOMCharacterData->substringData()

(No version information available, might be only in CVS)

DOMCharacterData->substringData() — Extracts a range of data from the node

### Description

DOMCharacterData
string substringData ( int `$offset` , int `$count` )

Returns the specified substring.

### Parameters

`offset`

  Start offset of substring to extract.

`count`

  The number of characters to extract.

### Return Values

The specified substring. If the sum of `offset` and `count` exceeds the length, then all 16-bit units to the end of the data are returned.

### Errors/Exceptions

`DOM_INDEX_SIZE_ERR`

  Raised if `offset` is negative or greater than the number of 16-bit units in data, or if `count` is negative.

### See Also

- DOMCharacterData->appendData()
- DOMCharacterData->deleteData()
- DOMCharacterData->insertData()
- DOMCharacterData->replaceData()