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Deprecated Features
PHP Core
Usage of dynamic properties
The creation of dynamic properties is deprecated, unless the class opts in by
using the #[\AllowDynamicProperties] attribute.
stdClass allows dynamic properties.
Usage of the __get()/__set() magic methods is not affected by this change.
A dynamic properties deprecation warning can be addressed by:
- Declaring the property (preferred).
-
Adding the
#[\AllowDynamicProperties]attribute to the class (which also applies to all child classes). - Using a WeakMap if additional data needs to be associated with an object which one does not own.
Relative callables
Callables that are not accepted by the $callable() syntax
(but are accepted by call_user_func()) are deprecated.
In particular:
"self::method""parent::method""static::method"["self", "method"]["parent", "method"]["static", "method"]["Foo", "Bar::method"][new Foo, "Bar::method"]
"A::method" or ["A", "method"].
"${var}" and "${expr}" style interpolation
The "${var}" and "${expr}" style of string
interpolation is deprecated.
Use "$var"/"{$var}" and "{${expr}}", respectively.
MBString
Usage of the QPrint, Base64,
Uuencode, and HTML-ENTITIES
'text encodings' is deprecated for all MBString functions.
Unlike all the other text encodings supported by MBString,
these do not encode a sequence of Unicode codepoints, but rather a sequence of raw bytes.
It is not clear what the correct return values for most MBString functions
should be when one of these non-encodings is specified.
Moreover, PHP has separate, built-in implementations of all of them;
for example, UUencoded data can be handled using
convert_uuencode()/convert_uudecode().
SPL
The internal SplFileInfo::_bad_state_ex() method has been deprecated.
Standard
utf8_encode() and utf8_decode() have been deprecated.
User Contributed Notes
