{"id":52799,"date":"2025-07-16T14:23:38","date_gmt":"2025-07-16T05:23:38","guid":{"rendered":"https:\/\/www.prime-strategy.co.jp\/blog\/52799"},"modified":"2025-07-16T14:24:53","modified_gmt":"2025-07-16T05:24:53","slug":"effortlessly-manage-php-versions-with-kusanagi-php","status":"publish","type":"post","link":"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/","title":{"rendered":"Effortlessly Manage PHP Versions with \u201ckusanagi php\u201d"},"content":{"rendered":"\n<p>This article explains how to use the kusanagi php command and compares it with kusanagi container.<\/p>\n\n\n\n<p>Hello, this is Fukuda from Prime Strategy.<\/p>\n\n\n\n<p>Did you know there\u2019s a command that lets you switch PHP versions instantly and optimize settings automatically? That\u2019s exactly what <code>kusanagi php<\/code> does.<\/p>\n\n\n\n<p>For reference, in KUSANAGI 9 (Business Edition or higher), there is also an alternative called <code>kusanagi container<\/code>, which allows you to switch PHP versions per profile. We&#8217;ll explore the differences later in this article.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_82_2 counter-hierarchy ez-toc-counter ez-toc-white ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/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: #999;color:#999\" 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: #999;color:#999\" 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:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Switching_PHP_Versions_with_the_%E2%80%93use_Option\" >Switching PHP Versions with the &#8211;use Option<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Reference_PHP_Versions_Compatible_with_WordPress_on_KUSANAGI\" >Reference: PHP Versions Compatible with WordPress on KUSANAGI<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Restarting_PHP_and_Optimizing_Settings\" >Restarting PHP and Optimizing Settings<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Comparing_kusanagi_php_and_kusanagi_container\" >Comparing kusanagi php and kusanagi container<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Pros_of_kusanagi_php\" >Pros of kusanagi php<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#A_Double-Edged_Sword_Version_Switching_for_All_Profiles\" >A Double-Edged Sword: Version Switching for All Profiles<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Cons_of_kusanagi_php\" >Cons of kusanagi php<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/#References\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Switching_PHP_Versions_with_the_%E2%80%93use_Option\"><\/span>Switching PHP Versions with the &#8211;use Option<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>To switch PHP versions, simply use the <code>--use<\/code> option. As of October 26, 2023, the available options are:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><code>php82<\/code> for PHP 8.2<\/li>\n\n\n\n<li><code>php81<\/code> for PHP 8.1<\/li>\n\n\n\n<li><code>php80<\/code> for PHP 8.0<\/li>\n\n\n\n<li><code>php74<\/code> for PHP 7.4<\/li>\n<\/ul>\n\n\n\n<p>This command uses <code>dnf<\/code> under the hood, which uninstalls the old version and installs the new one, so the process takes several seconds to a few minutes.<\/p>\n\n\n\n<p>For example, when upgrading from PHP 8.1 to 8.2, you\u2019ll see output similar to the following. Once you see <code>Complete!<\/code> followed by <code>php completed.<\/code>, the switch is complete.<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>&#91;root@host~]# kusanagi php --use php82 \nLast metadata expiration check: 1:07:54 ago on Fri Oct 27 02:17:40 2023.                                                Dependencies resolved.                                                                                                  ================================================================================                                         Package              Architecture Version                Repository       Size                                         ================================================================================\nInstalling:\n  kusanagi-php82       x86_64       8.2.11-1.el8           kusanagi         11 M\nInstalling dependencies:\n  libargon2            x86_64       20171227-3.el8         epel             29 k\nRemoving:\n  kusanagi-php81       x86_64       8.1.24-1.el8           @kusanagi        60 M                                                                                                                                                                 Transaction Summary                                                                                                     ================================================================================\nInstall  2 Packages\nRemove   1 Package                                                                                                                                                                                                                              Total download size: 11 M \nDownloading Packages:\n(1\/2): libargon2-20171227-3.el8.x86_64.rpm      712 kB\/s |  29 kB     00:00\n(2\/2): kusanagi-php82-8.2.11-1.el8.x86_64.rpm    45 MB\/s |  11 MB     00:00\n--------------------------------------------------------------------------------\nTotal                                            14 MB\/s |  11 MB     00:00\nRunning transaction check\nTransaction check succeeded.\nRunning transaction test\nTransaction test succeeded.\nRunning transaction\n  Preparing        :                                                        1\/1\n  Running scriptlet: libargon2-20171227-3.el8.x86_64                        1\/1\n  Installing       : libargon2-20171227-3.el8.x86_64                        1\/3\n  Installing       : kusanagi-php82-8.2.11-1.el8.x86_64                     2\/3\n  Running scriptlet: kusanagi-php82-8.2.11-1.el8.x86_64                     2\/3\n  Erasing          : kusanagi-php81-8.1.24-1.el8.x86_64                     3\/3\n  Running scriptlet: kusanagi-php81-8.1.24-1.el8.x86_64                     3\/3\n  Verifying        : libargon2-20171227-3.el8.x86_64                        1\/3\n  Verifying        : kusanagi-php82-8.2.11-1.el8.x86_64                     2\/3\n  Verifying        : kusanagi-php81-8.1.24-1.el8.x86_64                     3\/3\n\nInstalled:\n  kusanagi-php82-8.2.11-1.el8.x86_64       libargon2-20171227-3.el8.x86_64\nRemoved:\n  kusanagi-php81-8.1.24-1.el8.x86_64\n\nComplete!\nphp completed.<\/code><\/pre>\n\n\n\n<p>\u26a0\ufe0f Please be sure to confirm compatibility with your applications before switching versions.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Reference_PHP_Versions_Compatible_with_WordPress_on_KUSANAGI\"><\/span>Reference: PHP Versions Compatible with WordPress on KUSANAGI<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<figure class=\"wp-block-table\"><table><thead><tr><th>PHP Version<\/th><th>Supported WordPress Version<\/th><th>PHP EOL Date<\/th><\/tr><\/thead><tbody><tr><td>7.4<\/td><td>5.3 or higher<\/td><td>November 28, 2022<\/td><\/tr><tr><td>8.0<\/td><td>5.6 or higher<\/td><td>November 26, 2023<\/td><\/tr><tr><td>8.1<\/td><td>5.9 or higher<\/td><td>November 25, 2024<\/td><\/tr><tr><td>8.2<\/td><td>6.1 or higher<\/td><td>December 8, 2025<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>As you can see, PHP 7.4 is already past its end of life (EOL). Therefore, support for PHP 7.4 will soon be removed in KUSANAGI 9.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Restarting_PHP_and_Optimizing_Settings\"><\/span>Restarting PHP and Optimizing Settings<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>If you\u2019ve changed settings or encountered issues requiring a PHP restart, you typically use <code>systemctl restart php-fpm<\/code>. But with KUSANAGI, it\u2019s much simpler.<\/p>\n\n\n\n<p>Just run <code>kusanagi php<\/code> with no options. It will restart PHP and also optimize the instance settings if needed. Once <code>php completed.<\/code> is displayed, the restart was successful.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Comparing_kusanagi_php_and_kusanagi_container\"><\/span>Comparing kusanagi php and kusanagi container<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Both <code>kusanagi php<\/code> and <code>kusanagi container<\/code> deal with PHP, but they work differently:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Feature<\/th><th><code>kusanagi php<\/code><\/th><th><code>kusanagi container<\/code><\/th><\/tr><\/thead><tbody><tr><td>Affects<\/td><td>Host PHP (system-wide)<\/td><td>Per-profile using Podman<\/td><\/tr><tr><td>Version switching<\/td><td>Global<\/td><td>Per profile<\/td><\/tr><tr><td>Container required<\/td><td>No<\/td><td>Yes<\/td><\/tr><tr><td>Setup complexity<\/td><td>Simple<\/td><td>May require additional configuration<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Pros_of_kusanagi_php\"><\/span>Pros of kusanagi php<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Available on <strong>all editions<\/strong> of KUSANAGI 9\u2014not just Business Edition or higher.<\/li>\n\n\n\n<li>No need to modify WordPress settings during initial setup.<\/li>\n\n\n\n<li>Automatically optimizes configuration after changes.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"A_Double-Edged_Sword_Version_Switching_for_All_Profiles\"><\/span>A Double-Edged Sword: Version Switching for All Profiles<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>A key characteristic of <code>kusanagi php<\/code> is that it changes the PHP version for <strong>all<\/strong> profiles at once (if you\u2019re not using containers). This can be both a benefit and a drawback.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Pros:<\/strong>\n<ul class=\"wp-block-list\">\n<li>Easier to apply security patches, feature updates, and performance improvements.<\/li>\n\n\n\n<li>No need to update versions one profile at a time.<\/li>\n<\/ul>\n<\/li>\n\n\n\n<li><strong>Cons:<\/strong>\n<ul class=\"wp-block-list\">\n<li>If a new PHP version includes breaking changes, an across-the-board upgrade could break one or more sites.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cons_of_kusanagi_php\"><\/span>Cons of kusanagi php<span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>You <strong>cannot run multiple PHP versions<\/strong> simultaneously. All profiles must use the same version.<br>For example, if you want to try out new features in PHP 8.2 on one profile but still need PHP 7.4 on another, <code>kusanagi php<\/code> alone won\u2019t support that.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>We\u2019ve explored the features of <code>kusanagi php<\/code> and how it compares to <code>kusanagi container<\/code>.<br>We hope this helps you better understand how KUSANAGI handles PHP version management.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"References\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><a class=\"\" href=\"https:\/\/kusanagi.tokyo\/\">php \u2013 KUSANAGI Documentation<\/a><\/li>\n\n\n\n<li><a class=\"\" href=\"https:\/\/www.php.net\/supported-versions.php\">PHP: Supported Versions<\/a><\/li>\n\n\n\n<li><a>PHP Compatibility and WordPress Versions \u2013 Make WordPress Core<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>This article explains how to use the kusanagi php command and compares it with kusanagi container. Hello, this is Fukuda from Prime Strategy. Did you know there\u2019s a command that lets you switch PHP versions instantly and optimize settings automatically? That\u2019s exactly what kusanagi php does. For reference, in KUSANAGI 9 (Business Edition or higher), there is also an alternative called kusanagi container, which allows you to switch PHP versions per profile. We&#8217;ll explore the differences later in this article. Switching PHP Versions with the &#8211;use Option To switch PHP versions, simply use the &#8211;use option. As of October 26, 2023, the available options are: This command uses dnf under &#8230; <a title=\"Effortlessly Manage PHP Versions with \u201ckusanagi php\u201d\" class=\"read-more\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/\" aria-label=\"Read more about Effortlessly Manage PHP Versions with \u201ckusanagi php\u201d\">Read more<\/a><\/p>\n","protected":false},"author":39,"featured_media":52616,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"categories":[202,215],"tags":[],"class_list":["post-52799","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kusanagi-en","category-blog","generate-columns","tablet-grid-50","mobile-grid-100","grid-parent","grid-50","no-featured-image-padding"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Effortlessly Manage PHP Versions with \u201ckusanagi php\u201d - Prime Strategy Co., Ltd.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.prime-strategy.co.jp\/en\/blog\/52799\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Effortlessly Manage PHP Versions with \u201ckusanagi php\u201d - Prime Strategy Co., Ltd.\" \/>\n<meta property=\"og:description\" content=\"This article explains how to use the kusanagi php command and compares it with kusanagi container. Hello, this is Fukuda from Prime Strategy. Did you know there\u2019s a command that lets you switch PHP versions instantly and optimize settings automatically? That\u2019s exactly what kusanagi php does. For reference, in KUSANAGI 9 (Business Edition or higher), there is also an alternative called kusanagi container, which allows you to switch PHP versions per profile. We&#8217;ll explore the differences later in this article. Switching PHP Versions with the &#8211;use Option To switch PHP versions, simply use the --use option. As of October 26, 2023, the available options are: This command uses dnf under ... 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