DOMCharacterData::replaceData — Replace a substring within the DOMCharacterData node
count characters starting from position
The offset from which to start replacing.
The number of characters to replace. If the sum of
count exceeds the length, then all characters to the end of the data are replaced.
The string with which the range must be replaced.
No value is returned.
offset is negative or greater than the number of 16-bit units in data, or if
count is negative.