


How to debug interactive command line of PHP functions with PsySH?
PsySH provides an interactive PHP debugging command line interface to test code in real time without setting breakpoints or modifying the code. Its usage includes: Install PsySH: composer global require psy/psysh Start PsySH: psysh Define the function to be debugged: $multiply = function ($a, $b) {return $a * $b;} Call the function: multiply(2 , 3) Use the auto-complete function to view function signatures and information
How to use PsySH to debug the interactive command line of PHP functions
PsySH is an interactive debugging command line interface for PHP code. It allows you to quickly test your code in real time without setting breakpoints or modifying your code.
Install PsySH
The easiest way to install PsySH is to use Composer:
composer global require psy/psysh
Using PsySH
To start PsySH, run the following command:
psysh
This will open a PsySH instance in your terminal.
Debugging PHP functions in PsySH
To debug a PHP function, you can define it as a closure in PsySH:
$multiply = function ($a, $b) { return $a * $b; };
Now, You can call the function by name:
multiply(2, 3)
This will print the result in the terminal:
6
You can use PsySH's autocomplete feature to view the function signature and other information.
Practical Case
Suppose you are developing a function to count the number of words in a string. You can debug it in PsySH by following these steps:
- Define a function called
countWords
:
$countWords = function ($string) { return str_word_count($string); };
- At the command line Call the function in:
countWords("Hello, world!")
- You will see the result:
2
- If you want to view the source code of the function, you can use
dump
Commands:
dump(countWords)
Other Tips
- PsySH has a rich command set that allows you to inspect variables, run arbitrary code, and View the function trace.
- PsySH supports a variety of frameworks and libraries, including Laravel and Symfony.
- You can exit a session using the
exit
command in PsySH.
The above is the detailed content of How to debug interactive command line of PHP functions with PsySH?. For more information, please follow other related articles on the PHP Chinese website!

Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Notepad++7.3.1
Easy-to-use and free code editor

SublimeText3 Chinese version
Chinese version, very easy to use

Zend Studio 13.0.1
Powerful PHP integrated development environment

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)

Hot Topics



When developing websites using CraftCMS, you often encounter resource file caching problems, especially when you frequently update CSS and JavaScript files, old versions of files may still be cached by the browser, causing users to not see the latest changes in time. This problem not only affects the user experience, but also increases the difficulty of development and debugging. Recently, I encountered similar troubles in my project, and after some exploration, I found the plugin wiejeben/craft-laravel-mix, which perfectly solved my caching problem.

I'm having a tough problem when developing a complex web application: how to effectively handle JavaScript errors and log them. I tried several methods, but none of them could meet my needs until I discovered the library dvasilenko/alterego_tools. I easily solved this problem through the installation of this library through Composer and greatly improved the maintainability and stability of the project. Composer can be learned through the following address: Learning address

Article summary: This article provides detailed step-by-step instructions to guide readers on how to easily install the Laravel framework. Laravel is a powerful PHP framework that speeds up the development process of web applications. This tutorial covers the installation process from system requirements to configuring databases and setting up routing. By following these steps, readers can quickly and efficiently lay a solid foundation for their Laravel project.

When developing a Laravel application, I encountered a common but difficult problem: how to improve the security of user accounts. With the increasing complexity of cyber attacks, a single password protection is no longer enough to ensure the security of users' data. I tried several methods, but the results were not satisfactory. Finally, I installed the wiebenieuwenhuis/laravel-2fa library through Composer and successfully added two-factor authentication (2FA) to my application, greatly improving security.

Want to learn the Laravel framework, but suffer from no resources or economic pressure? This article provides you with free learning of Laravel, teaching you how to use resources such as online platforms, documents and community forums to lay a solid foundation for your PHP development journey from getting started to master.

Laravel is a popular PHP-based web application framework that is popular among developers for its elegant syntax and powerful features. Its latest version introduces many improvements and new features designed to improve the development experience and application performance. This article will dive into Laravel's latest approach, focusing on how to leverage these updates to build more powerful and efficient web applications.

In the Laravel framework version selection guide for beginners, this article dives into the version differences of Laravel, designed to assist beginners in making informed choices among many versions. We will focus on the key features of each release, compare their pros and cons, and provide useful advice to help beginners choose the most suitable version of Laravel based on their skill level and project requirements. For beginners, choosing a suitable version of Laravel is crucial because it can significantly impact their learning curve and overall development experience.

I had a tough problem when working on a project with a large number of Doctrine entities: Every time the entity is serialized and deserialized, the performance becomes very inefficient, resulting in a significant increase in system response time. I've tried multiple optimization methods, but it doesn't work well. Fortunately, by using sidus/doctrine-serializer-bundle, I successfully solved this problem, significantly improving the performance of the project.
