PHPPDO 1.2 is a bug fix release. You can grab it from:
https://sourceforge.net/projects/phppdo/

ChangeLog:

1.2 November 8, 2008

Fixed syntax error in postgres (maybe others too)
where a string literal can not be separated by space
from a quoted string. For example
regexp_split_to_table('some string', E'\\s+')
would break, because the query parser would generate: E '\\s+'
[Nikolay Ananiev <admin at devuni dot com>]

Fixed a bug, which would result in a syntax error
when casting values in postgres. For example:
SELECT '1'::integer;
would break, because the parser was thinking that
":integer" is an oracle placeholder.
[Nikolay Ananiev <admin at devuni dot com>]

Fixed a bug in the mysql driver (using the mysql extension)
when a null value is supplied to the quote method, it would return
an empty string.
[Nikolay Ananiev <admin at devuni dot com>]