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After freezing the database no more schema alterations take place. Relations among tables are mapped in the same way: by convention. For instance, to create a one-to-many relationship between two tables one assigns an array to the property bearing the name of the target table. This automatically creates the table as well as the required columns.
PHP is free software released under the terms of PHP License, which is incompatible with the GNU General Public License (GPL) due to the restrictions PHP License places on the usage of the term PHP. [12] Perl is a family of high-level, general-purpose, interpreted, dynamic programming languages. The languages in this family include Perl 5 and ...
As of 21 January 2025 (two months after PHP 8.4's release), PHP is used as the server-side programming language on 75.0% of websites where the language could be determined; PHP 7 is the most used version of the language with 47.1% of websites using PHP being on that version, while 40.6% use PHP 8, 12.2% use PHP 5 and 0.1% use PHP 4.
PHP treats newlines as whitespace, in the manner of a free-form language. The concatenation operator is . (dot). Array elements are accessed and set with square brackets in both associative arrays and indexed arrays. Curly brackets can be used to access array elements, but not to assign.
MySQL is a component of the LAMP web application software stack (and others), which is an acronym for Linux, Apache, MySQL, Perl/PHP/Python. MySQL is used by many database-driven web applications, including Drupal, Joomla, phpBB, and WordPress. [10] MySQL is also used by many popular websites, including Facebook, [11] [12] Flickr, [13 ...
PHP: MySQL: 2.2.4 [51] GNU GPL: 2018-06-20: Backdrop CMS: PHP: MySQL, MariaDB [52] 1.30.0 [53] GNU GPL: 2025-01-15: Bolt (CMS) PHP: MySQL, MariaDB, SQLite [54] 5.1.24 [55] MIT: 2023-02-19: b2evolution: PHP: MySQL, MariaDB [56] 7.2.5 [57] GNU GPLv2: 2022-08-06: CMSimple: PHP: Flat-file database: 5.15 [58] GNU GPLv3: 2024-03-25; 10 months ago CMS ...
Simple Groupware is a groupware package written in PHP. It uses the MySQL database (version 4 or higher). It contains a calendar system, an email client, an inventory system, and a number of other features. Simple Groupware is free software released under the GNU General Public License.
The nested set model is a technique for representing nested set collections (also known as trees or hierarchies) in relational databases.. It is based on Nested Intervals, that "are immune to hierarchy reorganization problem, and allow answering ancestor path hierarchical queries algorithmically — without accessing the stored hierarchy relation".