This period are made on an as-needed basis: there may be multiple point Reported are fixed and are released in regular point releases.Īfter this two year period of active support, each branch is then supportedįor an additional year for critical security issues only. During this period, bugs and security issues that have been They add more flexibility to the type system after the introduction of union types in PHP 8.0.Getting Started Introduction A simple tutorial Language Reference Basic syntax Types Variables Constants Expressions Operators Control Structures Functions Classes and Objects Namespaces Enumerations Errors Exceptions Fibers Generators Attributes References Explained Predefined Variables Predefined Exceptions Predefined Interfaces and Classes Predefined Attributes Context options and parameters Supported Protocols and Wrappers Security Introduction General considerations Installed as CGI binary Installed as an Apache module Session Security Filesystem Security Database Security Error Reporting User Submitted Data Hiding PHP Keeping Current Features HTTP authentication with PHP Cookies Sessions Dealing with XForms Handling file uploads Using remote files Connection handling Persistent Database Connections Command line usage Garbage Collection DTrace Dynamic Tracing Function Reference Affecting PHP's Behaviour Audio Formats Manipulation Authentication Services Command Line Specific Extensions Compression and Archive Extensions Cryptography Extensions Database Extensions Date and Time Related Extensions File System Related Extensions Human Language and Character Encoding Support Image Processing and Generation Mail Related Extensions Mathematical Extensions Non-Text MIME Output Process Control Extensions Other Basic Extensions Other Services Search Engine Extensions Server Specific Extensions Session Extensions Text Processing Variable and Type Related Extensions Web Services Windows Only Extensions XML Manipulation GUI Extensions Keyboard Shortcuts ? This help j Next menu item k Previous menu item g p Previous man page g n Next man page G Scroll to bottom g g Scroll to top g h Goto homepage g s Goto searchĮach release branch of PHP is fully supported for two years from its initial Intersections are defined by combining two or more types with an ampersand haracter. This wasn't always practical in cases where you couldn't modify the target class to implement your new interface. Previously you needed to create a new interface extending both of the desired ones. This is useful in cases where code needs to call instance methods that are defined by two different interfaces. These let you specify that a value must implement multiple interfaces. PHP's type system now understands intersections. # PHP 8.0 - This quickly becomes repetitive! Previously you needed to add repetitive methods to a class if you wanted to expose property values without allowing modification. This simplifies the creation of simple immutable value objects. Trying to change their value after initialization will throw an error. Readonly properties can only be written to once. Keyword marks a class property as immutable. # PHP 8.1 - Now it's impossible to pass an # PHP 8.0 - Cannot typehint that the value They may also have backing values and methods that attach extra behavior. They let you specify that a value must be one of a set of predefined constants.Ĭompared with regular constants, enums give you built-in validation when used as method parameters and return values. Enum types are finally part of the PHP language.
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