How to use debugging tools in CakePHP?

CakePHP is a PHP open source framework developed based on the MVC model and is widely welcomed by developers. As the project develops, how to quickly locate problems and debug them becomes particularly important. CakePHP provides powerful debugging tools through which developers can easily debug and diagnose errors. This article will introduce how to use debugging tools in CakePHP.

1. Turn on Debug mode

Before debugging, you need to turn on Debug mode in the application. Debug mode provides CakePHP with powerful debugging capabilities, allowing developers to easily find the problem. In a production environment, Debug mode should be turned off to ensure application performance and security.

Turning on Debug mode can be done through the configuration file config/app.php.

Open the app.php file, find the debug configuration item, and set its value to true.

'debug' => true,

2. Configure debugging tools

CakePHP provides a variety of debugging tools, including DebugKit, Kint and PHPDebugBar. In application development, developers can choose appropriate debugging tools according to their own needs.

1. DebugKit

DebugKit is one of the most commonly used debugging tools in the CakePHP framework. It contains a variety of debugging tools, such as panel information, routing, database query, view data, etc., which can help developers troubleshoot problems more quickly.

To use DebugKit, you need to install it first. It can be installed through composer and execute the following command:

composer require --dev cakephp/debug_kit

After the installation is completed, DebugKit needs to be loaded in config/bootstrap.php. Add the following code at the end of the file:

if (Configure::read('debug')) {

Plugin::load('DebugKit', ['bootstrap' => true]);

}

2. Kint

Kint is another commonly used debugging tool that can be used to display variables, exceptions, tracebacks, timing and other information. It allows developers to view information such as variable values ​​and call stacks in a simple and easy-to-understand way, helping developers quickly locate problems.

Using Kint also requires installation. It can be installed through composer, execute the following command:

composer require kint-php/kint

After the installation is completed, Kint needs to be loaded in the application:

include_once ROOT. '/vendor/autoload.php';
Kint::enabled(true);

3. PHPDebugBar

PHPDebugBar is a PHP-based debugging tool that can Implement functions such as data collection, message output, and data formatting. It provides a variety of panels, such as databases, routing, views, etc., to help developers analyze the running status of applications.

Using PHPDebugBar also requires installation. It can be installed through composer, execute the following command:

composer require maximebf/debugbar

After the installation is complete, you need to load PHPDebugBar in the application:

include_once ROOT . '/ vendor/autoload.php';
$debugbar = new DebugBarStandardDebugBar();
$debugbarRenderer = $debugbar->getJavascriptRenderer();
$debugbarRenderer->setBaseUrl('/debugbar/');

3. Use debugging tools

After configuring the debugging tools, you can start using them for debugging. In applications, debugging tool instructions can be inserted into the code to allow developers to quickly locate problems.

1. DebugKit tool

The DebugKit tool can be used after installation. At the bottom of the page, you can see the DebugKit toolbar. The toolbar can display a variety of information, such as calling time, database query time, memory usage, etc. Click the panel icon to view detailed information.

2. Kint tool

When using the Kint tool, you need to insert debugging instructions into the code. Where you need to debug, add the following code:

d($var);

Among them, $var is the variable that needs to be printed, and d represents the abbreviation of dump. When this code is executed, Kint will output the contents of $var and call stack information.

In addition to the d() function, Kint also provides a variety of debugging functions, such as dd(), s(), etc.

3. PHPDebugBar Tool

When using the PHPDebugBar tool, you need to add debugging code to the application. Where you need to debug, add the following code:

$debugbar['messages']->addMessage('Hello World');

Among them, $debugbar is the object of the PHPDebugBar tool. messages is the panel identifier, and addMessage() is used to add information to the panel.

4. Summary

Using the debugging tools in CakePHp can help developers solve problems more quickly and effectively. This article introduces how to turn on Debug mode, install and configure DebugKit, Kint and PHPDebugBar tools, and specific usage methods. In actual projects, developers need to choose appropriate debugging tools as needed and use them rationally in order to develop excellent applications more quickly.

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