Pthreads Programming O'reilly Pdf 28
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PHP uses late static binding. Variables are declared at runtime (as opposed to compile-time), methods dynamically callable at run-time, which prevents them from being optimized out or renamed. Functional-style coding is also possible, with anonymous functions registering themselves to receive an array of arguments as an input to the function body.
Zend represented the PHP application programming language from 1999 until 2007. Zend concurrently commercialized PHP and sponsored the PHP development team. The PHP community rejected Zend's effort, and they withdrew their support for the project. The PHP community, led by Rasmus Lerdorf, voted to create a new Open Source project, the PHP Group, which filed for incorporation with the Delaware Secretary of State on March 3, 2001. The PHP Group then formed their own legal entity, the phpGroup.
In the PHP source code, namespaces are delimited by two slashes. The namespace consists of one or more names, separated by the slashes. A namespace can be declared at the top of a file with a namespace statement. Names of classes, functions, and other PHP resources are relative to the current namespace. A PHP program typically does not need to reference the global namespace, and the phpGroup created a namespace to contain all global functions, allowing Zend to call public functions directly and hide their implementation.
PHP relies on several extensions built into the C library for extensibility, including SEP, Zend, and TSRGI, as well as external libraries such as GD and IMAP. PHP supports some built-in functionality, including a built-in regular expression engine and file system, although many of these have been superseded by the DOM and XML extensions in PHP 5.
PHP heavily relies on the C and Unix standards (such as ISO C, POSIX, and XSI) and is a cautious opensource project. It is not afraid to share ideas learned from other languages like C, Perl and C++.
PHP/FI 3.0 was released in April 1998. It added extensible functions, as well as arrays of channel jobs and file descriptors. Users could start new PHP scripts without a server, through the command line or through a regular scripting interface. PHP/FI 3 was released on March 1999 as PH5. At the time, it had 1.5% of the Internet market share. A total rewrite to the core language, leaving only the module API compatible, was started in July 1999. PHP/Zend 2 was officially released in December 2000. d2c66b5586