PHP_CodeSniffer VariableAnalysis

Forked from https://github.com/grohiro/PHP_Codesniffer-VariableAnalysis and merged different PRs. Code Modernization for PHP7 and ongoing changes coming up.

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.
• Allows $this inside closures in PHP >=5.4
• Add analysis of instance variables ($this->...)

INSTALLATION

composer require --global ksjogo/variable-analysis

Then add

<rule ref="VariableAnalysis"/>

to your ruleset.xml.

CUSTOMIZATION

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.

KNOWN ISSUES & BUGS

• File scope isn't currently analysed.