- 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).
