PHP_CodeSniffer
                                PHP_CodeSniffer tokenizes PHP files and detects violations of a defined set of coding standards.
                            
                        How to download and setup PHP_CodeSniffer
Open terminal and run command
                                            git clone https://github.com/PHPCSStandards/PHP_CodeSniffer.git
                                        
                                        git clone is used to create a copy or clone of PHP_CodeSniffer repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with PHP_CodeSniffer https://github.com/PHPCSStandards/PHP_CodeSniffer/archive/master.zip
Or simply clone PHP_CodeSniffer with SSH
                                            [email protected]:PHPCSStandards/PHP_CodeSniffer.git                                    
                                    If you have some problems with PHP_CodeSniffer
You may open issue on PHP_CodeSniffer support forum (system) here: https://github.com/PHPCSStandards/PHP_CodeSniffer/issuesSimilar to PHP_CodeSniffer repositories
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