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If you are new to PHP or just need to refresh your skills, this is the place to start. This series of tutorials will give you the basic knowledge you will need to create a simple PHP website.
PHP is a reflective programming language originally designed for producing dynamic web pages.[1] PHP is used mainly in server-side scripting, but can be used from a command line interface or in standalone graphical applications. Textual User Interfaces can also be created using ncurses.
(PHP 3 >= 3.0.4, PHP 4, PHP 5)
register_shutdown_function -- Register a function for execution on shutdown
Registers the function named by function to be
executed when script processing is complete.
Multiple calls to register_shutdown_function() can be made, and each will be called in the same order as they were registered. If you call exit() within one registered shutdown function, processing will stop completely and no other registered shutdown functions will be called.
In PHP 4.0.6 and earlier under Apache, the registered shutdown functions are called after the request has been completed (including sending any output buffers), so it is not possible to send output to the browser using echo() or print(), or retrieve the contents of any output buffers using ob_get_contents(). Since PHP 4.1, the shutdown functions are called as the part of the request so that it's possible to send the output from them. There is currently no way to process the data with output buffering functions in the shutdown function. Shutdown function is called after closing all opened output buffers thus, for example, its output will not be compressed if zlib.output_compression is enabled.
As of PHP 4, it is possible to pass parameters to the shutdown function by passing additional parameters to register_shutdown_function().
Note: Typically undefined functions cause fatal errors in PHP, but when the
functioncalled with register_shutdown_function() is undefined, an error of level E_WARNING is generated instead. Also, for reasons internal to PHP, this error will refer to Unknown at line #0.
Note: Working directory of the script can change inside the shutdown function under some web servers, e.g. Apache.
Note: Shutdown function is called during the script shutdown so headers are always already sent.
Another Useful functions:
zend-macro.zend-register-resource | zend-api.zend-unregister-ini-entries | zend-api.zend-unregister-functions | zend-api.zend-u-register-constant | zend-api.zend-register-stringl-constant | zend-api.zend-register-string-constant | zend-api.zend-register-resource | zend-api.zend-register-module | zend-api.zend-register-module-ex | zend-api.zend-register-long-constant | zend-api.zend-register-list-destructors | zend-api.zend-register-list-destructors-ex | zend-api.zend-register-internal-module | zend-api.zend-register-internal-interface | zend-api.zend-register-internal-class | zend-api.zend-register-internal-class-ex | zend-api.zend-register-interfaces | zend-api.zend-register-ini-entries | zend-api.zend-register-functions | zend-api.zend-register-double-constant | zend-api.zend-register-default-classes | zend-api.zend-register-constant | zend-api.zend-register-auto-global | zend-api.zend-ini-register-displayer | zend-api.unregister-ini-entries | zend-api.register-stringl-constant | zend-api.register-string-constant | zend-api.register-main-stringl-constant | zend-api.register-main-string-constant | zend-api.register-main-long-constant | zend-api.register-main-double-constant | zend-api.register-long-constant | zend-api.register-list-destructors | zend-api.register-ini-entries | zend-api.register-ini-displayer | zend-api.register-ini-boolean | zend-api.register-double-constant | streams.php-unregister-url-stream-wrapper | streams.php-stream-filter-unregister-factory | streams.php-stream-filter-register-factory | streams.php-register-url-stream-wrapper | function.xsl-xsltprocessor-register-php-functions | function.xpath-register-ns | function.xpath-register-ns-auto | function.xmlrpc-set-type | function.xmlrpc-server-register-method | function.xmlrpc-server-register-method | function.xmlrpc-server-register-introspection-callback | function.xmlrpc-server-register-introspection-callback | function.xmlrpc-server-destroy | function.w32api-register-function | function.unregister-tick-function | function.stream-wrapper-unregister | function.stream-wrapper-register | function.stream-register-wrapper | function.stream-filter-register | function.spl-autoload-unregister | function.spl-autoload-register | function.simplexml-element-registerxpathnamespace | function.session-unregister | function.session-register | function.session-is-registered | function.register-tick-function | function.register-shutdown-function | function.ircg-register-format-messages | function.http-request-method-unregister | function.http-request-method-register | function.dom-domxpath-registernamespace | function.dom-domdocument-registernodeclass |
PHP is a widely-used general-purpose scripting language that is especially suited for Web development and can be embedded into HTML. If you are new to PHP and want to get some idea of how it works, try the introductory tutorial. After that, check out the online manual, and the example archive sites and some of the other resources available in the links section.