A command line interface, php-cli, and two ActiveX Windows Script Host scripting engines for PHP have been produced. Order is preserved in lists of values and in hashes with both keys and values, and the two can be intermingled. Alternative implementations include the following: PHP is free software released under the PHP License, which stipulates that:[203]. [256], Websites using PHP include Facebook,[257] Digg,[258] Dailymotion,[259] and Tumblr. Changes from phpng are also expected to make it easier to improve performance in the future, as more compact data structures and other changes are seen as better suited for a successful migration to a just-in-time (JIT) compiler. [195][196] It is also the "reference implementation" of PHP, as PHP has no formal specification, and so the semantics of Zend PHP define the semantics of PHP. [65] PHP 7.0 also has type declarations for function return types, expressed by placing the type name after the list of parameters, preceded by a colon. PHP, Perl, and Python are common examples of scripting languages. On a web server, the result of the interpreted and executed PHP code – which may be any type of data, such as generated HTML or binary image data – would form the whole or part of an HTTP response. The default file extension for PHP files is ".php".A PHP file normally contains HTML tags, and some PHP scripting code. [187] PHP 5.3 added syntax to define an anonymous function or "closure"[188] which can capture variables from the surrounding scope. [218], PHP-FPM (FastCGI Process Manager) is an alternative FastCGI implementation for PHP, bundled with the official PHP distribution since version 5.3.3. When PHP is installed and used in cloud environments, software development kits (SDKs) are provided for using cloud-specific features. PHP 8 is a major version and has breaking changes from previous versions. [25][26], On 1 July 2004, PHP 5 was released powered by the new Zend Engine II. In particular, it involved the following changes: PHP 7 also included new language features. Enabled the filter extension by default. [215], By December 2018 the PHP Group consisted of ten people: Thies C. Arntzen, Stig Bakken, Shane Caraveo, Andi Gutmans, Rasmus Lerdorf, Sam Ruby, Sascha Schumann, Zeev Suraski, Jim Winstead, and Andrei Zmievski.[216]. Programming Language Vs Scripting Language. the hyphen) can be accomplished by encapsulating the element name within braces and the apostrophe. One live example says that we can design an interpreter for C language, and we can use it as a scripting language, and at the same time, the vice-versa also holds its value. [266][267], There are advanced protection patches such as Suhosin and Hardening-Patch, especially designed for web hosting environments. [197] Another example of a widely used opcode cache is the Alternative PHP Cache (APC), which is available as a PECL extension.[198]. While create_function() has existed since PHP 4.0.1, it is merely a thin wrapper around eval() that allows normal PHP functions to be created during program execution. The visibility of PHP properties and methods is defined using the keywords public, private, and protected. files, and even Flash movies. The following is a basic example of object-oriented programming in PHP 8: The only complete PHP implementation is the original, known simply as PHP. Suraski and Gutmans then started a new rewrite of PHP's core, producing the Zend Engine in 1999. The most common way of installing PHP-GTK is compiling it from the source code.[226]. PHP code is usually processed on a web server by a PHP interpreter implemented as a module, a daemon or as a Common Gateway Interface (CGI) executable. [231] The configuration file is split into various sections,[232] while some of the configuration options can be also set within the web server configuration. [28][29], Many high-profile open-source projects ceased to support PHP 4 in new code from February 5, 2008, because of the GoPHP5 initiative,[30] provided by a consortium of PHP developers promoting the transition from PHP 4 to PHP 5. There is no virtual table feature in the engine, so static variables are bound with a name instead of a reference at compile time. Because of major internal changes in phpng it must receive a new major version number of PHP, rather than a minor PHP 5 release, according to PHP's release process. Using the Boolean type conversion rules, non-zero values are interpreted as true and zero as false, as in Perl and C++. PHP has a direct module interface called SAPI for different web servers;[223] in case of PHP 5 and Apache 2.0 on Windows, it is provided in form of a DLL file called .mw-parser-output .monospaced{font-family:monospace,monospace}php5apache2.dll,[224] which is a module that, among other functions, provides an interface between PHP and the web server, implemented in a form that the server understands. [74] Because match is an expression, its result can be caught into a variable or returned from a function. For example, PHP can receive data from forms, generate dynamic page content, can work with databases, create sessions, send and receive cookies, send emails etc. While using W3Schools, you agree to have read and accepted our, PHP is an acronym for "PHP: Hypertext Preprocessor", PHP is a widely-used, open source scripting language, PHP files can contain text, HTML, CSS, JavaScript, and PHP code, PHP code is executed on the server, and the result is returned to the browser as plain HTML, PHP can create, open, read, write, delete, and close files on the server, PHP can add, delete, modify data in your database, PHP runs on various platforms (Windows, Linux, Unix, Mac OS X, etc. Various web template systems, web content management systems, and web frameworks exist which can be employed to orchestrate or facilitate the generation of that response. PHP is free. [182] PHP has a native Boolean type that is similar to the native Boolean types in Java and C++. [22], Zeev Suraski and Andi Gutmans rewrote the parser in 1997 and formed the base of PHP 3, changing the language's name to the recursive acronym PHP: Hypertext Preprocessor.
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