Integer values in function parameters

With the advent of PHP 5.0.x, a new parameter
parsing API was introduced which is used by a large number of PHP
functions. In all versions of PHP between 5.0.x and 5.1.x, the
handling of integer values was very strict and would reject
non-well formed numeric values when a PHP function expected an
integer. These checks have now been relaxed to support non-well
formed numeric strings such as ” 123″ and “123 “, and will no
longer fail as they did under PHP 5.0.x. However, to promote code
safety and input validation, PHP functions will now emit an
E_NOTICE when such strings are passed
as integers.