class UnsilencedDeprecationSniff

class UnsilencedDeprecationSniff extends FunctionCall {
    
    /**
     * Returns an array of function names this test wants to listen for.
     *
     * @return array<string>
     */
    public function registerFunctionNames() {
        return [
            'trigger_error',
        ];
    }
    
    //end registerFunctionNames()
    
    /**
     * Processes this function call.
     *
     * @param \PHP_CodeSniffer\Files\File $phpcsFile    The file being scanned.
     * @param int                         $stackPtr     The position of the function call in
     *                                                  the stack.
     * @param int                         $openBracket  The position of the opening
     *                                                  parenthesis in the stack.
     * @param int                         $closeBracket The position of the closing
     *                                                  parenthesis in the stack.
     *
     * @return void
     */
    public function processFunctionCall(file $phpcsFile, $stackPtr, $openBracket, $closeBracket) {
        $tokens = $phpcsFile->getTokens();
        $argument = $this->getArgument(2);
        // If no second argument then quit.
        if ($argument === false) {
            return;
        }
        // Only check deprecation messages.
        if (strcasecmp($tokens[$argument['start']]['content'], 'E_USER_DEPRECATED') !== 0) {
            return;
        }
        if ($tokens[$stackPtr - 1]['type'] !== 'T_ASPERAND') {
            $error = 'All trigger_error calls used for deprecation must be prefixed by an "@"';
            $fix = $phpcsFile->addFixableError($error, $stackPtr, 'UnsilencedDeprecation');
            if ($fix === true) {
                $phpcsFile->fixer
                    ->addContentBefore($stackPtr, '@');
            }
        }
    }
    
    //end processFunctionCall()

}