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Some more UPGRADING changes

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Nikita Popov 2015-02-13 21:42:44 +01:00
parent 7d0e3c01e6
commit 9d1e36e4b6
1 changed files with 37 additions and 13 deletions
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@ -191,8 +191,17 @@ Changes to parameter handling
Relevant RFC: https://wiki.php.net/phpng
Changes to integer operations
-----------------------------
Changes to integer handling
---------------------------
* Invalid octal literals (containing digits larger than 7) now produce compile
errors. For example, the following is no longer valid:
$i = 0781; // 8 is not a valid octal digit!
Previously the invalid digits (and any following valid digits) were simply
ignored. As such $i previously held the value 7, because the last two digits
were silently discarded.
* Bitwise shifts by negative numbers will now throw a warning and return false:
@ -211,10 +220,33 @@ Changes to integer operations
* Similarly right bitwise shifts by a number of bits beyond the bit width of an
integer will always result in 0 or -1 (depending on sign):
var_dump(1 >> 64); // int(0)
var_dump(-1) >> 64); // int(-1)
var_dump(1 >> 64); // int(0)
var_dump(-1 >> 64); // int(-1)
Relevant RFC: https://wiki.php.net/rfc/integer_semantics
* Strings that contain hexadecimal numbers are no longer considered to be
numeric and don't receive special treatment anymore. Some examples of the
new behavior:
var_dump("0x123" == "291"); // bool(false) (previously true)
var_dump(is_numeric("0x123")); // bool(false) (previously true)
var_dump("0xe" + "0x1"); // int(0) (previously 16)
var_dump(substr("foo", "0x1")); // string(3) "foo" (previously "oo")
// Notice: A non well formed numeric value encountered
filter_var() can be used to check if a string contains a hexadecimal number
or convert such a string into an integer:
$str = "0xffff";
$int = filter_var($str, FILTER_VALIDATE_INT, FILTER_FLAG_ALLOW_HEX);
if (false === $int) {
throw new Exception("Invalid integer!");
}
var_dump($num); // int(65535)
Relevant RFCs:
* https://wiki.php.net/rfc/integer_semantics
* https://wiki.php.net/rfc/remove_hex_support_in_numeric_strings
Other core changes
------------------
@ -238,15 +270,7 @@ Other core changes
. Added zend_memnrstr, zend_memnrstr_ex.
. Added hybrid sorting algo zend_sort for better performance.
. Added stable sorting algo zend_insert_sort.
. Invalid octal literals in source code now produce compile errors, fixing
PHPSadness #31. Previously, the invalid digits (and any following valid
digits) were simply ignored, such that 0781 became 7.
. Removed dl() function on fpm-fcgi.
. Removed support for hexadecimal numeric strings. This means that some
operations like == will no longer specially interpret strings containing
hexadecimal numbers. Furthermore is_numeric() will not consider hexadecimal
strings to be numeric (use FILTER_VALIDATE_INT instead).
(RFC: https://wiki.php.net/rfc/remove_hex_support_in_numeric_strings)
. $HTTP_RAW_POST_DATA is no longer available. Use the php://input stream instead.
Other