php manual PHP Manual - migration5.newconf

PHP, short for "PHP: Hypertext Preprocessor", is an open-source, reflective programming language used mainly for developing server-side applications and dynamic web content, and more recently, other software.

PHP allows interaction with a large number of relational database management systems, such as MySQL, Oracle, IBM DB2, Microsoft SQL Server, PostgreSQL and SQLite. PHP runs on most major operating systems, including UNIX, Linux, Windows, and Mac OS X, and can interact with many major web servers. The official PHP website contains extensive documentation.

There is a command line interface, as well as GUI libraries such as the Gimp Tool Kit (GTK+) and text mode libraries like Ncurses and Newt.

PHP is the result of the efforts of many contributors. It is licensed under the PHP License, a BSD-style license. Since version 4, it has been powered by the Zend engine.

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New Directives

New Directives

There were some new php.ini directives introduced in PHP 5. Here is a list of them:

  • mail.force_extra_parameters - Force the addition of the specified parameters to be passed as extra parameters to the sendmail binary. These parameters will always replace the value of the 5th parameter to mail(), even in safe mode

  • register_long_arrays - allow/disallow PHP to register the deprecated long $HTTP_*_VARS

  • session.hash_function - select a hash function (MD5 or SHA-1)

  • session.hash_bits_per_character - define how many bits are stored in each character when converting the binary hash data to something readable (from 4 to 6)

  • zend.ze1_compatibility_mode - Enable compatibility mode with Zend Engine 1 (PHP 4)