DOMCharacterData->substringData()

Extracts a range of data from the node ()

DOMCharacterData {
  string substringData(int offset,
                       int count);

}

Returns the specified substring.

参数

offset

Start offset of substring to extract.

count

The number of characters to extract.

返回值

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.

异常

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.