Other changes
Apprise on arithmetic with invalid strings
New E_WARNING and E_NOTICE errors
have been introduced when invalid strings are coerced using the arithmetic
operators (+ - *
/ ** %
<< >> |
& ^). An E_NOTICE
is emitted when the string can be partially converted to a sensical numeric,
and an E_WARNING is emitted when the string cannot be
converted at all to a sensical numeric.
<?php
'1b' + 'something';
Результат выполнения данного примера:
Notice: A non well formed numeric value encountered in %s on line %d Warning: A non-numeric value encountered in %s on line %d
Warn on octal overflow
Previously, 3 octit octals could overflow without warning the programmer.
Now, an E_WARNING will be emitted on such overflows
(with the previous overflow behavior remaining the same).
<?php
var_dump("\500");
Результат выполнения данного примера:
Warning: Octal escape sequence overflow \500 is greater than \377 in %s on line %d string(1) "@"
Inconsistency Fixes to $this
Whilst $this is considered a special variable in PHP, it lacked proper checks to ensure it wasn't used as a variable name or reassigned. This has now been rectified to ensure that `$this` cannot be a user-defined variable, reassigned to a different value, or be globalised.
Session ID generation without hashing
Session IDs will no longer be hashed upon generation. With this change brings about the removal of the following four ini settings:
-
session.entropy_file -
session.entropy_length -
session.hash_function -
session.hash_bits_per_character
And the addition of the following two ini settings:
-
session.sid_length- defines the length of the session ID, defaulting to 32 characters for backwards compatibility) -
session.sid_bits_per_character- defines the number of bits to be stored per character (i.e. increases the range of characters that can be used in the session ID), defaulting to 4 for backwards compatibility
Коментарии
Note that using Incrementing/Decrementing operators on string is legal<?php
$str = "";
echo ++$str; // output: 1
?>