{"id":23104,"date":"2024-04-01T13:48:27","date_gmt":"2024-04-01T12:48:27","guid":{"rendered":"https:\/\/nelkodev.com\/blog\/garbage-collection-en-php-como-funciona-y-por-que-es-importante\/"},"modified":"2024-06-03T18:40:14","modified_gmt":"2024-06-03T17:40:14","slug":"garbage-collection-en-php-como-funciona-y-por-que-es-importante","status":"publish","type":"post","link":"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/","title":{"rendered":"Garbage Collection in PHP: How does it work and why is it important?"},"content":{"rendered":"<p>In programming, memory management is one of the key aspects to ensure optimal performance and efficiency in our applications. In PHP, one of the fundamental processes related to memory management is Garbage Collection (GC), a technique that is responsible for freeing memory used by objects that are no longer needed. In this article, we will explore how the Garbage Collection works in PHP and why it is important in application development.<\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_80 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #ffffff;color:#ffffff\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #ffffff;color:#ffffff\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#%C2%BFQue_es_el_Garbage_Collection_en_PHP\" >What is Garbage Collection in PHP?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#%C2%BFComo_funciona_el_Garbage_Collection_en_PHP\" >How does Garbage Collection work in PHP?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#1_Marcado\" >1. Marking:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#2_Barrido\" >2. Sweep:<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#3_Liberacion\" >3. Release:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#Importancia_del_Garbage_Collection_en_PHP\" >Importance of Garbage Collection in PHP<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#Preguntas_frecuentes\" >Frequently asked questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#1_%C2%BFEs_necesario_utilizar_Garbage_Collection_en_PHP\" >1. Is it necessary to use Garbage Collection in PHP?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#2_%C2%BFComo_puedo_verificar_si_el_Garbage_Collection_esta_activado_en_mi_entorno_PHP\" >2. How can I check if Garbage Collection is enabled in my PHP environment?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#3_%C2%BFCuando_se_ejecuta_el_Garbage_Collection_en_PHP\" >3. When is the Garbage Collection executed in PHP?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/nelkodev.com\/en\/blog\/garbage-collection-in-php-how-it-works-and-why-it-is-important\/#4_%C2%BFEs_posible_desactivar_el_Garbage_Collection_en_PHP\" >4. Is it possible to disable the Garbage Collection in PHP?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"%C2%BFQue_es_el_Garbage_Collection_en_PHP\"><\/span>What is Garbage Collection in PHP?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Garbage Collection is an automatic process carried out by the programming language to free the memory occupied by objects that are no longer used. In PHP, the Garbage Collection is responsible for identifying and deleting objects that are no longer referenced by any part of the program. This implies that these objects are inaccessible and can no longer be used in the program execution flow.<\/p>\n<p>The Garbage Collection process in PHP is based on the principle of references. Every time an object is created, a reference is assigned to it. As long as there is at least one reference pointing to the object, that object is considered to be in use and will not be released by the Garbage Collector. However, when a reference stops pointing to the object, the Garbage Collector identifies it as an inaccessible object and takes care of freeing the memory it occupied.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"%C2%BFComo_funciona_el_Garbage_Collection_en_PHP\"><\/span>How does Garbage Collection work in PHP?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Garbage Collection process in PHP is divided into three main phases: marking, sweeping, and releasing. Next, we will describe each of these phases:<\/p>\n<h3><span class=\"ez-toc-section\" id=\"1_Marcado\"><\/span>1. Marking:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In this phase, the Garbage Collector actively loops through all references accessible from the main program and marks the objects that are being used. It uses algorithms such as the mark and sweep algorithm to identify and mark referenced objects.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_Barrido\"><\/span>2. Sweep:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In the sweep phase, the Garbage Collector scans the entire program memory and looks for objects that have not been marked in the marking phase. These objects are considered inaccessible and will be candidates for release.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_Liberacion\"><\/span>3. Release:<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>In the last phase, the Garbage Collector is responsible for freeing the memory occupied by the inaccessible objects found in the sweep phase. This is achieved automatically, without manual intervention on the part of the developer.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Importancia_del_Garbage_Collection_en_PHP\"><\/span>Importance of Garbage Collection in PHP<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The Garbage Collection plays a fundamental role in the development of PHP applications. By freeing the memory occupied by inaccessible objects, you avoid the exhaustion of memory resources and improve application performance, preventing the occurrence of memory leaks. Additionally, it reduces the developer&#039;s workload as there is no need to manually manage the release of memory for each object created.<\/p>\n<p>PHP has an automated Garbage Collection system that manages memory efficiently, allowing the developer to focus on the application logic instead of manual memory management.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Preguntas_frecuentes\"><\/span>Frequently asked questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"1_%C2%BFEs_necesario_utilizar_Garbage_Collection_en_PHP\"><\/span>1. Is it necessary to use Garbage Collection in PHP?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, you need to use Garbage Collection in PHP to efficiently manage the memory used by objects and avoid resource exhaustion and memory leaks.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"2_%C2%BFComo_puedo_verificar_si_el_Garbage_Collection_esta_activado_en_mi_entorno_PHP\"><\/span>2. How can I check if Garbage Collection is enabled in my PHP environment?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can check if the Garbage Collection is enabled in your PHP environment using the function <\/p>\n<pre>gc_enabled()<\/pre>\n<p>. This function returns true if the Garbage Collection is enabled and false if not.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"3_%C2%BFCuando_se_ejecuta_el_Garbage_Collection_en_PHP\"><\/span>3. When is the Garbage Collection executed in PHP?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The Garbage Collection is automatically executed in PHP when a certain memory threshold is reached or when explicitly invoked using the function <\/p>\n<pre>gc_collect_cycles()<\/pre>\n<p>.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"4_%C2%BFEs_posible_desactivar_el_Garbage_Collection_en_PHP\"><\/span>4. Is it possible to disable the Garbage Collection in PHP?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Yes, it is possible to disable the Garbage Collection in PHP using the configuration directive <\/p>\n<pre>zend.enable_gc<\/pre>\n<p> in the php.ini file. However, it is recommended not to disable Garbage Collection as it may cause performance issues and memory leaks.<\/p>\n<p>In conclusion, Garbage Collection in PHP is an essential technique for efficient memory management in our applications. By understanding how it works and why it is important, developers can optimize performance and prevent issues related to memory usage. Thus, we can guarantee fast, stable and scalable applications.<\/p>","protected":false},"excerpt":{"rendered":"<p>En la programaci\u00f3n, la gesti\u00f3n de la memoria es uno de los aspectos clave para garantizar un rendimiento y una eficiencia \u00f3ptimas en nuestras aplicaciones. En PHP, uno de los procesos fundamentales relacionados con la gesti\u00f3n de la memoria es el Garbage Collection (GC), una t\u00e9cnica que se encarga de liberar la memoria utilizada por [&hellip;]<\/p>","protected":false},"author":1,"featured_media":23105,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[420,2206,16],"tags":[38,41,31,205,950,151,952,951,15,101],"class_list":["post-23104","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-php","category-programacion","tag-como","tag-por","tag-que","tag-blog","tag-collection","tag-funciona","tag-garbage","tag-importante","tag-php","tag-programacion"],"_links":{"self":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts\/23104","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/comments?post=23104"}],"version-history":[{"count":0,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/posts\/23104\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/media\/23105"}],"wp:attachment":[{"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/media?parent=23104"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/categories?post=23104"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/nelkodev.com\/en\/wp-json\/wp\/v2\/tags?post=23104"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}