Dynamic Web Pages :
deutschsprachiges PHP-Handbuch : dom-domcharacterdata-deletedata
(no version information, might be only in CVS)
Deletes count characters starting from position
The offset from which to start removing.
The number of characters to delete. If the sum of
offset and count exceeds
the length, then all characters to the end of the data are deleted.
No value is returned.
Raised if offset is negative or greater than the
number of 16-bit units in data, or if count is