{"id":32006,"date":"2022-04-12T19:05:54","date_gmt":"2022-04-12T19:05:54","guid":{"rendered":"https:\/\/www.arimetrics.com\/glosario-digital\/php"},"modified":"2026-10-02T11:32:01","modified_gmt":"2026-10-02T11:32:01","slug":"php","status":"publish","type":"encyclopedia","link":"https:\/\/www.arimetrics.com\/en\/digital-glossary\/php","title":{"rendered":"PHP"},"content":{"rendered":"<p><img decoding=\"async\" class=\"boxpad wp-image-30172 size-full alignright\" src=\"https:\/\/www.arimetrics.com\/wp-content\/uploads\/2022\/03\/PHP-Glosario.jpg\" alt=\"PHP\" width=\"300\" height=\"300\" srcset=\"https:\/\/www.arimetrics.com\/wp-content\/uploads\/2022\/03\/PHP-Glosario.jpg 300w, https:\/\/www.arimetrics.com\/wp-content\/uploads\/2022\/03\/PHP-Glosario-150x150.jpg 150w\" sizes=\"(max-width: 300px) 100vw, 300px\" \/><strong>Definition:<\/strong> <strong>PHP<\/strong> is an open-source, general-purpose programming language that runs primarily on the server. It is used to build dynamic websites, web applications, and services that can process data, query databases, and generate responses for a browser.<\/p>\n<p>Its name is the recursive acronym for &#8220;PHP: Hypertext Preprocessor&#8221;. The code can be embedded in <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/html\">HTML<\/a> documents or kept in separate files and application layers. The browser does not receive the original <strong>PHP code<\/strong>. It receives the result produced by the server, such as an HTML page, a JSON response, or a file.<\/p>\n\n<h2>How PHP works<\/h2>\n<p>When someone requests a page, the web server passes the request to the <strong>PHP interpreter<\/strong>. It executes the instructions, can retrieve session data, query a <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/database\">database<\/a>, or communicate with other services, and then returns a response. This process takes place before the content reaches the user&#8217;s device.<\/p>\n<p>PHP handles <strong>server-side logic<\/strong>, while HTML structures content and <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/css\">CSS<\/a> controls its presentation. <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/javascript\">JavaScript<\/a> commonly provides browser interactivity, although it can also run outside the browser. These technologies have different roles and can work together within the same application.<\/p>\n<p>The <a href=\"https:\/\/www.php.net\/\" target=\"_blank\" rel=\"noopener\">official PHP website<\/a> distributes the language and maintains its <strong>official documentation<\/strong>. In real projects, PHP is often used through a content management system, a framework, or a custom architecture that organizes routes, templates, data access, and business rules.<\/p>\n<h2>What PHP is used for<\/h2>\n<p>The language&#8217;s flexibility makes it suitable for projects with different sizes and objectives. Its <strong>common applications<\/strong> include:<\/p>\n<ul>\n<li><strong>Content management:<\/strong> platforms such as WordPress, Joomla, and Drupal use PHP to publish and manage pages, users, templates, and extensions.<\/li>\n<li><strong>Forums:<\/strong> solutions such as phpBB and vBulletin support <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/internet-forum\">Internet forums<\/a> and communities with profiles, conversations, and moderation systems.<\/li>\n<li><strong>Online learning:<\/strong> systems such as Moodle manage courses, materials, activities, assessments, and student accounts.<\/li>\n<li><strong>Ecommerce:<\/strong> applications such as Magento and OpenCart use PHP to manage catalogs, orders, payments, and <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/ecommerce\">ecommerce<\/a> integrations.<\/li>\n<li><strong>Sales management:<\/strong> tools such as SuiteCRM use PHP to organize contacts, opportunities, communications, and sales processes.<\/li>\n<li><strong>Social applications:<\/strong> community platforms can use it to manage profiles, posts, permissions, and interactions between users.<\/li>\n<li><strong>APIs:<\/strong> PHP can also create an <a href=\"https:\/\/www.arimetrics.com\/en\/digital-glossary\/api\">API<\/a> that exchanges information with mobile applications, external services, or web interfaces.<\/li>\n<\/ul>\n<h2>Advantages of PHP<\/h2>\n<p>PHP has a mature ecosystem and broad availability in web hosting environments. Its <strong>practical advantages<\/strong> depend on the project, the team, and the way it is implemented:<\/p>\n<ul>\n<li><strong>Accessible deployment:<\/strong> many hosting providers and web servers support PHP and provide tools for configuring it.<\/li>\n<li><strong>Broad ecosystem:<\/strong> frameworks, dependency managers, libraries, CMS platforms, and documentation resources cover many use cases.<\/li>\n<li><strong>Active community:<\/strong> an extensive base of professionals, documentation, and open-source projects makes it easier to find support and maintained components.<\/li>\n<li><strong>Data integration:<\/strong> extensions and libraries support different database engines and external services.<\/li>\n<li><strong>Portability:<\/strong> PHP can run on different operating systems and work with several web servers.<\/li>\n<li><strong>Mature tooling:<\/strong> frameworks and utilities help organize testing, routing, templates, validation, security, and maintenance.<\/li>\n<\/ul>\n<p>Using PHP does not by itself guarantee <strong>fast page loads<\/strong> or better search rankings. Performance depends on factors including the code, queries, infrastructure, caching, loaded resources, and continuous application monitoring.<\/p>\n<h2>Maintenance and security<\/h2>\n<p>A PHP application needs updates and controls throughout its life cycle. The <strong>essential measures<\/strong> include:<\/p>\n<ul>\n<li><strong>Supported version:<\/strong> use an officially supported branch and plan upgrades before its maintenance period ends.<\/li>\n<li><strong>Updated dependencies:<\/strong> review the framework, CMS, plugins, and libraries to address vulnerabilities and compatibility problems.<\/li>\n<li><strong>Validated input:<\/strong> check received data and use prepared statements to reduce risks such as code or SQL injection.<\/li>\n<li><strong>Protected output:<\/strong> encode content for its destination context before displaying it to prevent attacks such as cross-site scripting.<\/li>\n<li><strong>Secure configuration:<\/strong> protect credentials and sessions, restrict permissions, and prevent technical errors or secrets from being exposed publicly.<\/li>\n<li><strong>Continuous monitoring:<\/strong> log errors, measure performance, create backups, and verify that changes do not degrade the service.<\/li>\n<\/ul>\n<p>The choice of PHP should reflect the <strong>system requirements<\/strong>, the team&#8217;s experience, the expected maintenance, and the available infrastructure. Its ecosystem makes it an established option for the web when the project is designed and operated with appropriate technical practices.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>PHP is a server-side language for dynamic websites, applications, and APIs. Learn how it works, its uses, advantages, and security practices.<\/p>\n","protected":false},"author":33,"featured_media":81125,"template":"","encyclopedia-tag":[1273,1458],"class_list":["post-32006","encyclopedia","type-encyclopedia","status-publish","has-post-thumbnail","hentry","encyclopedia-tag-web-programming","encyclopedia-tag-web-server-infrastructure"],"_links":{"self":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/encyclopedia\/32006","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/encyclopedia"}],"about":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/types\/encyclopedia"}],"author":[{"embeddable":true,"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/users\/33"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/media\/81125"}],"wp:attachment":[{"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/media?parent=32006"}],"wp:term":[{"taxonomy":"encyclopedia-tag","embeddable":true,"href":"https:\/\/www.arimetrics.com\/en\/wp-json\/wp\/v2\/encyclopedia-tag?post=32006"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}