php get the total number of lines of code

<?php
ini_set('max_execution_time', '0');
function code_linenum($path, $i) {
    if (!is_dir($path)) {
        return false;
    }
    $files = glob($path . '/*');
    if ($files) {
        foreach ($files as $file) {
            if (is_dir($file)) {
                code_linenum($file, $i);
            }
            $buffer = '';
            $handle = @fopen($file, 'r');
            if ($handle) {
                while(!feof($handle)) {
                    $buffer = fgets($handle,4096);
                    $buffer = trim($buffer);    //同等于==$buffer = str_replace("\r\n", '', $buffer);
                    if (!empty($buffer)) {
                        $comments = array();
                        $comments[0]  = '';
                        $comments[0] .= preg_match('/\/\//i', $buffer) ? '####' : '';
                        $comments[0] .= preg_match('/\/\*\*/i', $buffer) ? '####' : '';
                        $comments[0] .= preg_match('/\*\s/i', $buffer) ? '####' : '';
                        $comments[0] .= preg_match('/\*\//i',$buffer) ? '####' : '';
                        if (empty($comments[0])) {
                            global $i;
                            $i++;
                        }
                    }
                }
                fclose($handle);
            }
        }
    }
    return $i;
}
// Call function 
global  $i ;
 $linenums = code_linenum('D:/guozi/V3.0' , $i );
 echo 'The total number of lines of code is:' . $linenums ;