DOMCharacterData->substringData() Extracts a range of data from the node &reftitle.description; DOMCharacterData stringsubstringData intoffset intcount Returns the specified substring. &reftitle.parameters; offset Start offset of substring to extract. count The number of characters to extract. &reftitle.returnvalues; 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. &reftitle.errors; 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. &reftitle.seealso;