Count all the lines of programming vs comments in a file after all the files within a directory have been concatenated together.

comment_percent_counter.php

<?php

// find . -type f -exec cat {} > ../results.txt \;

$data = file_get_contents('/Users/davidnorman/Sites/lowescat.txt');

$original = count(explode("\n", $data));
print "Original lines: ". $original;
print "<br />\n";

$data = preg_replace("/(\\/\\/.*\\n)/", "", $data); // remove single line comments, like this, from // to \\n
$data = preg_replace("/(\\/\\*.*\\*\\/)/", "", $data);  // remove multi-line comments /* */
$data = preg_replace("/(<![^>]*>)/", "", $data);  // remove multi-line comments <!-- -->

//$fp = fopen('/Users/davidnorman/Sites/lowescat_stripped.txt', 'w');
//fwrite($fp, $stripped);
//fclose($fp);
$filtered = count(explode("\n", $data));
print "Comment-filtered lines: ". $filtered; 

print "<br />\n";

$math = (($original - $filtered) / $original) * 100;

print "Percent comments: $math%";