- Core：
? . Added support for typed properties. For example:
? ? ? ? class User {
? ? ? ? ? ? public int $id;
? ? ? ? ? ? public string $name;
? ? ? ? }
? ? This will enforce that $user->id can only be assigned integer and
? ? $user->name can only be assigned strings. For more information see the
? ? RFC: https://wiki.php.net/rfc/typed_properties_v2
? . Added support for arrow functions with implicit by-value scope binding.
? ? For example:
? ? ? ? $factor = 10;
? ? ? ? $nums = array_map(fn($num) => $num * $factor, $nums);
? ? RFC: https://wiki.php.net/rfc/arrow_functions_v2
? . Added support for limited return type covariance and argument type
? ? contravariance. The following code will now work:
? ? ? ? class A {}
? ? ? ? class B extends A {}
? ? ? ? class Producer {
? ? ? ? ? ? public function method(): A {}
? ? ? ? }
? ? ? ? class ChildProducer extends Producer {
? ? ? ? ? ? public function method(): B {}
? ? ? ? }
? ? Full variance support is only available if autoloading is used. Inside a
? ? single file only non-cyclic type references are possible, because all
? ? classes need to be available before they are referenced.
? ? RFC: https://wiki.php.net/rfc/covariant-returns-and-contravariant-parameters
? . Added support for coalesce assign (??=) operator. For example:
? ? ? ? $array['key'] ??= computeDefault();
? ? ? ? // is roughly equivalent to
? ? ? ? if (!isset($array['key'])) {
? ? ? ? ? ? $array['key'] = computeDefault();
? ? ? ? }
? ? RFC: https://wiki.php.net/rfc/null_coalesce_equal_operator
? . Added support for unpacking inside arrays. For example:
? ? ? ? $arr1 = [3, 4];
? ? ? ? $arr2 = [1, 2, ...$arr1, 5];
? ? ? ? // $arr2 == [1, 2, 3, 4, 5]
? ? RFC: https://wiki.php.net/rfc/spread_operator_for_array
? . Support for WeakReferences has been added.
? ? RFC: https://wiki.php.net/rfc/weakrefs
? . Throwing exceptions from __toString() is now permitted. Previously this
? ? resulted in a fatal error. Existing recoverable fatals in string conversions
? ? have been converted to Error exceptions.
? ? RFC: https://wiki.php.net/rfc/tostring_exceptions
- CURL:
? . CURLFile now supports stream wrappers in addition to plain file names, if
? ? the extension has been built against libcurl >= 7.56.0.? The streams may
? ? need to be seekable.
- Filter:
? . The FILTER_VALIDATE_FLOAT filter now supports the min_range and max_range
? ? options, with the same semantics as FILTER_VALIDATE_INT.
- FFI:
? . A new extension which provides a simple way to call native functions, access
? ? native variables and create/access data structures defined in C libraries.
? ? RFC: https://wiki.php.net/rfc/ffi
- GD:
? . Added the "scatter" image filter (IMG_FILTER_SCATTER) to apply a scatter
? ? filter to images. This filter has the following prototype:
? ? ? ? imagefilter($im, IMG_FILTER_SCATTER, int $sub, int $plus, array $colors = []);
? ? The $colors array can be populated with a set of indexed colors where to
? ? apply the scatter pixel shifting on.
? ? Note, the result of this filter is always random.
- Hash:
? . Added "crc32c" hash using Castagnoli's polynomial. This crc32 variant is
? ? used by storage systems, such as iSCSI, SCTP, Btrfs and ext4.
- Mbstring:
? . Added mb_str_split() function, which provide the same functionality as
? ? str_split(), but operating on code points rather than bytes.
? ? RFC: https://wiki.php.net/rfc/mb_str_split
- OPcache:
? . Support for preloading code has been added.
? ? RFC: https://wiki.php.net/rfc/preload
- PCRE:
? . The preg_replace_callback() and preg_replace_callback_array() functions now
? ? accept an additional $flags argument, with support for the
? ? PREG_OFFSET_CAPTURE and PREG_UNMATCHED_AS_NULL flags. This influences the
? ? format of the matches array passed to to the callback function.
- PDO_OCI:
? . PDOStatement::getColumnMeta() is now available
- PDO_SQLite:
? . PDOStatement::getAttribute(PDO::SQLITE_ATTR_READONLY_STATEMENT) allows to
? ? check whether this statement is read-only, i.e. whether it doesn't modify
? ? the database.
- Standard:
? . strip_tags() now also accepts an array of allowed tags: Instead of
? ? strip_tags($str, '<a><p>') you can now write strip_tags($str, ['a', 'p']).
? . A new mechanism for custom object serialization has been added, which
? ? uses two new magic methods:
? ? ? ? // Returns array containing all the necessary state of the object.
? ? ? ? public function __serialize(): array;
? ? ? ? // Restores the object state from the given data array.
? ? ? ? public function __unserialize(array $data): void;
? ? The new serialization mechanism supersedes the Serializable interface,
? ? which will be deprecated in the future.
? ? RFC: https://wiki.php.net/rfc/custom_object_serialization
? . array_merge() and array_merge_recursive() may now be called without any
? ? arguments, in which case they will return an empty array. This is useful
? ? in conjunction with the spread operator, e.g. array_merge(...$arrays).
