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Sunday, 4 September 2016


PHP_CodeSniffer tokenizes PHP, JavaScript and CSS files and detects violations of a defined set of coding standards.


PHP_CodeSniffer is a set of two PHP scripts; the main phpcs script that tokenizes PHP, JavaScript and CSS files to detect violations of a defined coding standard, and a second phpcbf script to automatically correct coding standard violations. PHP_CodeSniffer is an essential development tool that ensures your code remains clean and consistent.
Build Status Code consistency
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PHP_CodeSniffer requires PHP version 5.1.2 or greater, although individual sniffs may have additional requirements such as external applications and scripts. See the Configuration Options manual page for a list of these requirements.
The SVN pre-commit hook requires PHP version 5.2.4 or greater due to its use of the vertical whitespace character.


The easiest way to get started with PHP_CodeSniffer is to download the Phar files for each of the commands:
curl -OL
php phpcs.phar -h

curl -OL
php phpcbf.phar -h
If you use PEAR, you can install PHP_CodeSniffer using the PEAR installer. This will make the phpcs and phpcbfcommands immediately available for use. To install PHP_CodeSniffer using the PEAR installer, first ensure you have installed PEAR and then run the following command:
pear install PHP_CodeSniffer
If you prefer using Composer you can easily install PHP_CodeSniffer system-wide with the following command:
composer global require "squizlabs/php_codesniffer=*"
Make sure you have ~/.composer/vendor/bin/ in your PATH.
Or alternatively, include a dependency for squizlabs/php_codesniffer in your composer.json file. For example:
    "require-dev": {
        "squizlabs/php_codesniffer": "2.*"
You will then be able to run PHP_CodeSniffer from the vendor bin directory:
./vendor/bin/phpcs -h
./vendor/bin/phpcbf -h
You can also download the PHP_CodeSniffer source and run the phpcs and phpcbf commands directly from the Git clone:
git clone
cd PHP_CodeSniffer
php scripts/phpcs -h
php scripts/phpcbf -h


The documentation for PHP_CodeSniffer is available on the Github wiki.
Information about upcoming features and releases is available on the Squiz Labs blog.

PHP_CodeSniffer VariableAnalysis

Variables plugin for PHP Codesniffer static analysis tool. 
Plugin for PHP_CodeSniffer static analysis tool that adds analysis of problematic variable use.
  • Performs static analysis of variable use.
  • Warns on use of undefined variables.
  • Warns if variables are set or declared but never used within that scope.
  • Warns if variables are redeclared within same scope.
  • Warns if $this, self::$static_member, static::$static_member is used outside class scope.


Run ./ -h to get install help.
For a default install of PHP_Codesniffer via PEAR with PEAR in ~/pear you should be safe to just run ./ to use the default options, then copy the rules from ruleset.xml into your own ruleset.xml.


There's a variety of options to customize the behaviour of VariableAnalysis, take a look at the included ruleset.xml for commented examples of a configuration.