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Code can be modularized into functions defined with keyword function. PHP supports an optional object oriented coding style, with classes denoted by the class keyword. Functions defined inside classes are sometimes called methods. Control structures include: if, while, do/while, for, foreach, and switch. Statements are terminated by a semicolon ...
PHP >= 7.2 [77] (ver 4 and up) or PHP >= 5.6.0 [78] (until ver 3.1.11) Any Yes Push Mostly [79] Third party only Ready for next release, Unit tests for v.4 and up Yes Yes Yes Yes Yes No [80] Yes Templates Fat-Free Framework: PHP >= 5.4 [81] Any MVC, RMR Push-pull Yes Data mappers for SQL, MongoDB, Flat-File Built-in Yes Yes Yes
The class defines the data format or type (including member variables and their types) and available procedures (class methods or member functions) for a given type or class of object. Objects are created by calling a special type of method in the class known as a constructor .
MongoDB is a source-available, cross-platform, document-oriented database program. Classified as a NoSQL database product, MongoDB utilizes JSON-like documents with optional schemas. MongoDB is developed by MongoDB Inc. and current versions are licensed under the Server Side Public License (SSPL). MongoDB is a member of the MACH Alliance.
Somewhat similar to a function, a data constructor is applied to arguments of an appropriate type, yielding an instance of the data type to which the type constructor belongs. For example, the data constructor Leaf is logically a function Int -> Tree, meaning that giving an integer as an argument to Leaf produces a value of the type Tree.
Class Cat defines a virtual function named speak, so its subclasses may provide an appropriate implementation (e.g. either meow or roar). When the program calls the speak function on a Cat reference (which can refer to an instance of Cat , or an instance of HouseCat or Lion ), the code must be able to determine which implementation of the ...
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PHP 8.3 was released on November 23, 2023. This release introduced readonly array properties, allowing arrays to be declared as immutable after initialization. It also added support for class aliases for built-in PHP classes, new methods for random float generation in the Random extension, and enhanced PHP INI settings with fallback value support.