PHP has been widely ported and can be deployed on most web servers on almost every operating system and platform, free of charge. The standard PHP interpreter, powered by the Zend Engine, is free software released under the PHP License. PHP code can also be directly executed from the command line. Additionally, PHP can be used for many programming tasks outside of the web context, such as standalone graphical applications and robotic drone control. 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. 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. 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. PHP originally stood for Personal Home Page, but it now stands for the recursive initialism PHP: Hypertext Preprocessor. The PHP reference implementation is now produced by The PHP Group. It was originally created by Danish-Canadian programmer Rasmus Lerdorf in 1994. PHP is a general-purpose scripting language especially suited to web development. Perl, HTML, C, C++, Java, Tcl, JavaScript, Hack Zend Engine, HHVM, PeachPie, Quercus, Parrot Normalized it to some extent.PHP License (most of Zend engine under Zend Engine License) I needed a function that would determine the type of callable being passed, and, eventually, The code would work fine, if we replaced the '$callback()' with 'call_user_func($callback)' or if we used the array as the callback instead. Thus, the following code will produce an error "Fatal error: Call to undefined function foo::doStuff() in /tmp/code.php on line 4": Calling parent method using the array structureĪll of these cases are correctly recognized as callbacks by the 'callable' type hint, however. Calling static class methods via strings such as 'foo::doStuff' Note, however, that the following are not supported when calling callbacks as variable functions, even though they are supported by call_user_func(): Using the array structure has worked since 5.4.0 Calling anonymous functions and invokable objects has worked since 5.3.0 Using the name of a function as string has worked since at least 4.3.0 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 searchĪ note on differences when calling callbacks as "variable functions" without the use of call_user_func() (e.g.
0 Comments
Leave a Reply. |
Details
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |