{"id":382962,"date":"2023-05-23T12:34:57","date_gmt":"2023-05-23T12:34:57","guid":{"rendered":"https:\/\/webkul.com\/blog\/?p=382962"},"modified":"2026-02-27T07:39:19","modified_gmt":"2026-02-27T07:39:19","slug":"xdebug-for-debugging-the-magento-application","status":"publish","type":"post","link":"https:\/\/webkul.com\/blog\/xdebug-for-debugging-the-magento-application\/","title":{"rendered":"How to Set Up and Use Xdebug in Magento 2 for Smarter PHP Debugging"},"content":{"rendered":"\n<p>A complete guide to Xdebug for Debugging the Magento Application with step-by-step setup and configuration. Learn how to trace errors, analyze code flow, and improve <a href=\"https:\/\/webkul.com\/magento-development\/\">Magento development<\/a> efficiency.<\/p>\n\n\n\n<p>Debugging Magento 2 can be challenging \u2014 it\u2019s a massive framework with layered architecture, dependency injections, and countless class calls.<\/p>\n\n\n\n<p>If you\u2019re still using <code>var_dump()<\/code>, <code>print_r()<\/code>, or <code>die()<\/code> to track issues, it\u2019s time to upgrade your debugging skills with <strong>Xdebug<\/strong>.<\/p>\n\n\n\n<p>Xdebug is a PHP extension that gives you <strong>step debugging<\/strong>, <strong>variable inspection<\/strong>, <strong>profiling<\/strong>, and <strong>trace logging<\/strong> \u2014 all from within your IDE like VS Code.<\/p>\n\n\n\n<p>Applications like Magento 2 have a highly complex structure, hundreds of files and methods are invoked when we load a page.<\/p>\n\n\n\n<p>Debugging a small issue can take a lot of time, and keeping track of all the files where you have added debugging code is also hectic.<\/p>\n\n\n\n<p>In some cases, a <a href=\"https:\/\/webkul.com\/hire-magento-developers\/\">Magento 2 developer<\/a> forgets to remove debugging statements like <code>var_dump()<\/code> before deployment, causing unexpected output and serious issues on the live website.<\/p>\n\n\n\n<p>Xdebug is also used to generate profiling data, which we can analyze in tools like kcachegrind to find out performance bottlenecks.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>What Is Xdebug?<\/strong><\/h2>\n\n\n\n<p><a href=\"https:\/\/xdebug.org\/\">Xdebug<\/a> is a PHP extension that enhances PHP\u2019s debugging capabilities. It helps you trace the exact execution path, view call stacks, and inspect variables in real time.<\/p>\n\n\n\n<p><strong>Key Benefits of Xdebug:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Step through your Magento code line-by-line.<\/li>\n\n\n\n<li>Set breakpoints and watch variables.<\/li>\n\n\n\n<li>Identify performance bottlenecks using profiling.<\/li>\n\n\n\n<li>Debug web requests and CLI commands with ease.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Let&#8217;s understand the different modes of Xdebug<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>develop<\/strong>: enabling this mode will enhance the debugging functions of PHP like var_dump to show more information to the developer for a better understanding of the issue it will add pre-tags automatically, show stack trace, etc.<\/li>\n\n\n\n<li><strong>coverage:<\/strong> This mode will help in better code coverage for php unit test cases<\/li>\n\n\n\n<li><strong>debug<\/strong>: this will enable step debugging so that developer can trace each step of the request and can easily add breakpoints in the code to find the root cause of the issues<\/li>\n\n\n\n<li><strong>gcstats<\/strong>: this will show statistics related to the PHP garbage collector<\/li>\n\n\n\n<li><strong>profile<\/strong>: enabling this will generate cachegrind files which can be analyzed is kcachegrind in order to find performance issues<\/li>\n\n\n\n<li><strong>trace<\/strong>: enabling this mode will result in generating the whole request trace in the log where cachegrind files are generated with trace.*.txt name which can be in 3 formats human-readable format, machine format, and HTML format this can be very useful to understand the whole application flow, but warning it will generate a huge file(in GB) in application like Magento2<\/li>\n\n\n\n<li><strong>off<\/strong>: this will turn off Xdebug<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-wk-block-youtube-video wp-block-wk-block--yt-video components-placeholder\"><div class=\"wk-block--yt-video-frame\"><div class=\"wk-block--yt-video-frame-request\" data-plyr-provider=\"youtube\" data-plyr-embed-id=\"oMDjjtNmYZg\"><div class=\"components-placeholder__instructions\">oMDjjtNmYZg<\/div><\/div><\/div><\/div>\n\n\n\n<p><\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Installation<\/strong><\/h3>\n\n\n\n<p>Xdebug can be installed like any other PHP extension, if you are installing it on Ubuntu with Apache and php8.4-fpm then run this command:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">sudo apt-get install php8.4-xdebug<\/pre>\n\n\n\n<p class=\"has-text-align-left\">The command installs the Xdebug extension for PHP 8.4. You can adjust the version number, for example, to use <code>php8.x-xdebug<\/code> for PHP 8.x<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">\/etc\/php\/8.4\/apache2\/conf.d\/20-xdebug.ini<\/pre>\n\n\n\n<p>Or you can find its location simply by running this command :<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">php -i | grep xdebug<\/pre>\n\n\n\n<p>or by outputting php_info() function on the webpage.<\/p>\n\n\n\n<p>In the ini file make sure this line is there and uncommented:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">zend_extension=xdebug.so<\/pre>\n\n\n\n<p>after that you need to restart the php fpm and apache using the below commands:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">sudo service apach2 restart\n\nsudo service php8.4-fpm restart<\/pre>\n\n\n\n<p>now run this command to confirm Xdebug is installed and working:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">php --version<\/pre>\n\n\n\n<p>above command will output something like this:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">PHP 8.4.13 (cli) (built: Oct  1 2025 20:33:51) (NTS)\nCopyright (c) The PHP Group\nBuilt by Debian\nZend Engine v4.4.13, Copyright (c) Zend Technologies\n    with Zend OPcache v8.4.13, Copyright (c), by Zend Technologies\n    with Xdebug v3.4.5, Copyright (c) 2002-2025, by Derick Rethans<\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Now let&#8217;s dive into how to configure Xdebug to debug code in vs code editor<\/strong><\/h3>\n\n\n\n<p>Xdebug offers multiple configuration options that can be managed through the <strong>xdebug.ini<\/strong> file. After making changes, restart <strong>PHP-FPM<\/strong> and <strong>Apache<\/strong> for them to apply.<\/p>\n\n\n\n<p>Once Xdebug is active, configure your IDE (like <strong>VS Code<\/strong>) to start debugging Magento code easily. Let\u2019s check the key settings to include in the <em>xdebug.ini<\/em> file.<\/p>\n\n\n\n<p>you need to add the below settings to your xdebug.ini file:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">zend_extension = xdebug.so\nxdebug.mode = debug\nxdebug.start_with_request = yes\nxdebug.client_host = 127.0.0.1\nxdebug.client_port = 9003\nxdebug.idekey = VSCODE\nxdebug.log = \/var\/log\/xdebug.log<\/pre>\n\n\n\n<p>xdebug.log is the setting to set a log file path, where Xdebug will show its status, errors, and connections this can be any location on your system<\/p>\n\n\n\n<p>xdebug.mode is to set mode, in the above setting I have only set debug, you can also set other modes as well like this :<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">xdebug.mode=debug,profile,trace<\/pre>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><tbody><tr><td><strong>Setting<\/strong><\/td><td><strong>Description<\/strong><\/td><\/tr><tr><td>xdebug.mode<\/td><td>Enables the debugging feature<\/td><\/tr><tr><td><code>xdebug.start_with_request<\/code><\/td><td>Starts debugging automatically with each request<\/td><\/tr><tr><td><code>xdebug.client_host<\/code><\/td><td>The IP address where your IDE runs<\/td><\/tr><tr><td><code>xdebug.client_port<\/code><\/td><td>Port used by Xdebug (default: 9003)<\/td><\/tr><tr><td><code>xdebug.idekey<\/code><\/td><td>Key used to identify the IDE<\/td><\/tr><tr><td><code>xdebug.log<\/code><\/td><td>Optional log file to track Xdebug activity<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p>we can also set other options as well, like:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">xdebug.start_with_request=trigger<\/pre>\n\n\n\n<p>if this option is set then Xdebug will only work if there is an XDEBUG_TRIGGER option set in either GET, POST, or Cookie in the request or we can also add this :<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">xdebug.start_with_request=trigger\nxdebug.trigger_value=MyCustomValue<\/pre>\n\n\n\n<p>trigger_value setting will ensure that Xdebug will only work in the XDEBUG_TRIGGER option value is set to MyCustomValue.<\/p>\n\n\n\n<p><strong>Now let&#8217;s understand how to configure vs code to start using xdebug<\/strong><\/p>\n\n\n\n<p>Open vs code editor and press:<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">CTRL+SHIFT+X<\/pre>\n\n\n\n<p>to open the extensions tab now search for \u201cphp debug\u201d This will show the PHP Debug extension install the extension by clicking on the install button:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"487\" src=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug-1200x487.jpg\" alt=\"install xdebug\" class=\"wp-image-383189\" srcset=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug-1200x487.jpg 1200w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug-300x122.jpg 300w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug-250x101.jpg 250w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug-768x312.jpg 768w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug-1536x623.jpg 1536w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/install_xdebug.jpg 1801w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" loading=\"lazy\" \/><figcaption class=\"wp-element-caption\">Xdebug Install<\/figcaption><\/figure>\n\n\n\n<p>Now on the top menu in vs code open the &#8216;Run&#8217; menu and click on \u201cadd configuration\u201d It will open the launch.json file with three configuration options:<\/p>\n\n\n\n<p><strong>Listen For Xdebug<\/strong><\/p>\n\n\n\n<p>we will be using this configuration, it starts debugging as soon as a request starts running and an Xdebug connection is created<\/p>\n\n\n\n<p><strong>Launch Currently Open Script<\/strong><\/p>\n\n\n\n<p>this is used to debug currently open scripts as a standalone or console program<\/p>\n\n\n\n<p><strong>Launch Built-in web server<\/strong><\/p>\n\n\n\n<p>this will launch a web server and create an Xdebug connection<\/p>\n\n\n\n<p>Now in vs code open the \u201cRun and Debug\u201d tab by running :<\/p>\n\n\n\n<pre class=\"EnlighterJSRAW\">CTRL+SHIFT+D<\/pre>\n\n\n\n<p>Now on the left top, you can see \u201cRun And Debug\u201d where there will be a green play button and dropdown of launch.json file configurations to choose.<\/p>\n\n\n\n<p>From before opening a code file and adding some breakpoints by clicking before the line number,<\/p>\n\n\n\n<p>When you hover near the line number, a red dot appears \u2014 click it to add a <strong>breakpoint<\/strong>. Then, select <strong>\u201cListen for Xdebug\u201d<\/strong>, click the <strong>play<\/strong> button, and reload the page in your browser.<\/p>\n\n\n\n<p>The editor will automatically return to the active breakpoint for debugging.<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"539\" src=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-1200x539.png\" alt=\"xdebug breakpoint\" class=\"wp-image-383185\" srcset=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-1200x539.png 1200w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-300x135.png 300w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-250x112.png 250w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-768x345.png 768w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-1536x690.png 1536w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add-604x270.png 604w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_breakpoint_add.png 1844w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" loading=\"lazy\" \/><figcaption class=\"wp-element-caption\">Xdebug Add Breakpoints<\/figcaption><\/figure>\n\n\n\n<p>After coming back to the breakpoints you will also see a tool on top of the code like below:<\/p>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"196\" src=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool-1200x196.jpg\" alt=\"xdebug step tool\" class=\"wp-image-383188\" srcset=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool-1200x196.jpg 1200w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool-300x49.jpg 300w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool-250x41.jpg 250w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool-768x126.jpg 768w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool-1536x251.jpg 1536w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_step_tool.jpg 1846w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" loading=\"lazy\" \/><figcaption class=\"wp-element-caption\">Xdebug Step Debug Tool<\/figcaption><\/figure>\n\n\n\n<p>You can drag that tool horizontally anywhere on the editor, let&#8217;s see all the options there:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Pause<\/strong>: this button is to pause the step debugging if you are doing something else and later again start it to start the step debugging.<\/li>\n\n\n\n<li><strong>Step Over<\/strong>: this will move the step directly to the next breakpoint<\/li>\n\n\n\n<li><strong>Step into:<\/strong> this will move the step to the next function call<\/li>\n\n\n\n<li><strong>Restart:<\/strong> this will restart the debugging from the first breakpoint<\/li>\n\n\n\n<li><strong>Stop: <\/strong>this will stop the debugging until you start a new one.<\/li>\n<\/ol>\n\n\n\n<p>On the left section of the editor, you can also see some sections like variables, watch, call stack, and breakpoints like this:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Variables<\/strong> will show all the variables accessible on that page<\/li>\n\n\n\n<li><strong>Watch<\/strong> section is where you can add variables, and functions to watch throughout the whole execution, you can add them by simply selecting them into the code and right click on them then \u201cclick add to watch\u201d<\/li>\n\n\n\n<li><strong>Call Stack<\/strong> will show the backtrace of calls of functions for each step<\/li>\n\n\n\n<li><strong>Breakpoints<\/strong> will show all the breakpoints that you have added<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-large\"><img decoding=\"async\" width=\"1200\" height=\"643\" src=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1-1200x643.jpg\" alt=\"xdebug sections\" class=\"wp-image-383181\" srcset=\"https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1-1200x643.jpg 1200w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1-300x161.jpg 300w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1-250x134.jpg 250w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1-768x411.jpg 768w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1-1536x822.jpg 1536w, https:\/\/cdnblog.webkul.com\/blog\/wp-content\/uploads\/2023\/05\/xdebug_sections-1.jpg 1847w\" sizes=\"(max-width: 1200px) 100vw, 1200px\" loading=\"lazy\" \/><figcaption class=\"wp-element-caption\">Xdebug Sections<\/figcaption><\/figure>\n\n\n\n<p>I hope this guide inspires other developers to integrate <strong>Xdebug<\/strong> into their daily development workflow to enhance debugging efficiency and streamline the coding process.<\/p>\n\n\n\n<p>In my next blog, I\u2019ll cover <strong>profiling with Xdebug and KCachegrind<\/strong> for deeper performance analysis.<\/p>\n\n\n\n<p>Thanks \ud83d\ude42<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>A complete guide to Xdebug for Debugging the Magento Application with step-by-step setup and configuration. Learn how to trace errors, analyze code flow, and improve Magento development efficiency. Debugging Magento 2 can be challenging \u2014 it\u2019s a massive framework with layered architecture, dependency injections, and countless class calls. If you\u2019re still using var_dump(), print_r(), or <a href=\"https:\/\/webkul.com\/blog\/xdebug-for-debugging-the-magento-application\/\">[&#8230;]<\/a><\/p>\n","protected":false},"author":477,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[9121,13,1],"tags":[12967,14250,2070,2057,1319],"class_list":["post-382962","post","type-post","status-publish","format-standard","hentry","category-magento-2","category-php","category-uncategorized","tag-adobe-commerce","tag-debugging","tag-magento2","tag-php","tag-xdebug"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>How to Set Up Xdebug in Magento 2 for Smarter PHP Debugging<\/title>\n<meta name=\"description\" content=\"Xdebug is a powerful tool to make php developer&#039;s life much easier, it\u2019s a PHP extension that developers must use only in the 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