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Migrating from PHP 8.3.x to PHP 8.4.x
New Features
New Classes, Enums, and Interfaces
New Functions
New Global Constants
Backward Incompatible Changes
Deprecated Features
Removed Extensions
Other Changes
Windows Support
New Features
New Functions
Migrating from PHP 8.3.x to PHP 8.4.x
Last updated: Mon, 26 Oct 2026
New Classes, Enums, and Interfaces
Core
Deprecated
RequestParseBodyException
BCMath
BcMath\Number
DBA
Dba\Connection
DOM
Dom\HTMLDocument
Dom\XMLDocument
Dom\Document
Dom\ParentNode
Dom\ChildNode
Dom\Implementation
Dom\Node
Dom\NodeList
Dom\NamedNodeMap
Dom\DtdNamedNodeMap
Dom\HTMLCollection
Dom\AdjacentPosition
Dom\Element
Dom\HTMLElement
Dom\Attr
Dom\CharacterData
Dom\Text
Dom\CDATASection
Dom\ProcessingInstruction
Dom\Comment
Dom\DocumentType
Dom\DocumentFragment
Dom\Entity
Dom\EntityReference
Dom\Notation
Dom\TokenList
Dom\NamespaceInfo
Dom\XPath
ODBC
Odbc\Connection
Odbc\Result
PCNTL
Pcntl\QosClass
(macOS only)
PDO_DBLIB
Pdo\DbLib
PDO_FIREBIRD
Pdo\Firebird
PDO_MYSQL
Pdo\Mysql
PDO_ODBC
Pdo\Odbc
PDO_PGSQL
Pdo\Pgsql
PDO_SQLITE
Pdo\Sqlite
Reflection
ReflectionConstant
SOAP
Soap\Url
Soap\Sdl
Standard
RoundingMode
StreamBucket
New Features
New Functions
Migrating from PHP 8.3.x to PHP 8.4.x
Last updated: Mon, 26 Oct 2026