<?php class PHPCS_Sniffs_Whitespace_ConcatenationSpacingSniff implements PHP_CodeSniffer_Sniff { public function register() { return array(T_STRING_CONCAT); } public function process(PHP_CodeSniffer_File $phpcsFile, $stackPtr) { $tokens = $phpcsFile->getTokens(); if ($tokens[($stackPtr - 1)]['code'] !== T_WHITESPACE || $tokens[($stackPtr + 1)]['code'] !== T_WHITESPACE) { $phpcsFile->addError( 'Concatenation operator must be surrounded by whitespace', $stackPtr ); } } }