The PHP 3.0 Apache module no longer supports Apache
versions prior to 1.2. Apache 1.2 or later is
required.
echo() no longer supports a format string. Use
the
printf() function instead.
In PHP/FI 2.0, an implementation side-effect caused
$foo[0] to have the same effect
as $foo. This is not true for
PHP 3.0.
Reading arrays with
$array[] is no longer supported
That is, you cannot traverse an array by having a
loop that does $data = $array[].
Use
current() and next() instead.
Also, $array1[] = $array2
does not append the values of
$array2 to $array1, but
appends $array2 as the last
entry of $array1. See also
multidimensional array support.
"+" is no longer overloaded
as a concatenation operator for strings, instead it
converts it's arguments to numbers and performs numeric
addition. Use "." instead.