Merge pull request #522 from craftcms/feature/new-modify-purchasables…

…-table-event Add `modifyPurchasablesTableQuery` example event code
craftcms · Jul 18, 2023 · 66571e8 · 66571e8
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diff --git a/docs/4.x/extend/README.md b/docs/4.x/extend/README.md
@@ -146,6 +146,10 @@ Any time you’re working with PHP, [PhpStorm](https://www.jetbrains.com/phpstor
 
 DDEV comes [pre-configured with xdebug](https://ddev.readthedocs.io/en/stable/users/debugging-profiling/step-debugging/), and can be connected to your IDE of choice to support breakpoints and step-debugging.
 
+#### Debug Toolbar
+
+Yii’s built-in [debug toolbar](repo:yiisoft/yii2-debug) is invaluable, especially while troubleshooting database queries, [events](events.md), and other performance issues.
+
 #### Composer
 
 If your journey with Craft so far has not involved [Composer](https://getcomposer.org), certain concepts (like namespacing and auto-loading) may present additional difficulty. Consider reviewing our article on using the [starter project](kb:using-the-starter-project), and try running [updates](../updating.md#composer) or installing a plugin with Composer.