How to Verify Magento 2 Source Code with M2 Coding Sniffer?

Learn how to verify Magento 2 source code with an M2 coding sniffer with a few steps.

As you know, Magento 2 uses the code standard PSR-2 and all extensions must follow this standard. Today, I will show you how to check your code satisfies the Magento 2 coding standard or not.

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Verify Magento 2 Source Code

ECG Magento Code Sniffer Coding Standard allows automatically check your code:

• Raw SQL queries
• SQL queries inside a loop
• Direct instantiation of Mage and Enterprise classes
• Unnecessary collection loading
• Excessive code complexity
• Use of dangerous functions
• Use of PHP superglobals

3 main steps that you need to follow to check with the Source Code:

1. Step 1: Use composer to download the ECG code standard
2. Step 2: Please wait until the source code is downloaded to your server
3. Step 3: Please enter the command line to scan your code with the Magento 2 coding sniffer

Step 1:

Use composer to download the ECG code standard. Please go to your SSH and enter this command:

$ composer require magento–ecg/coding-standard

Step 2:

• Please wait until the source code is downloaded to your server. You will see the “vendor” which is created after the composer command is finished.
• Add the standards directory to PHP_CodeSniffer installed paths:

$ phpcs –config-set installed_paths ./vendor/magento-ecg/coding-standard

 Step 3:

• Please enter the command line to scan your code with Magento 2 coding sniffer:

$ phpcs –standard=EcgM2 /path/to/code

• PHP CodeSniffer will automatically scan Magento PHP files. To check design templates, you can run:

$ phpcs –standard=EcgM2 /path/to/code –extensions argument: –extensions=php,phtml

Here is some error and warning which your code may have:

• WARNING| Usage of $this in template files is deprecated: you can use $block instead of $this in the template
• WARNING| Possible useless method overriding detected: You code override, but it is useless
• WARNING| Function’s cyclomatic complexity (15) exceeds 10: use too much “if” or “for” in one function
• ERROR| The use of function call_user_func_array() is  forbidden
• WARNING| Model LSD method load() detected in the loop: load model in the loop. You should join a table instead of that.

And that is how you verify Magento 2 source code with an M2 coding sniffer.

I think that is all the process and the note to verify Magento 2 source code with M2 coding sniffer. This is a really helpful kind of product type, it helps you to check your code satisfies the Magento 2 coding standard or not. Therefore, learning to verify Magento 2 source code with an M2 coding sniffer and to manage its custom options one of the tasks for all Magento 2 store owners.

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