count words of regex pattern in php?

I'm trying to match pattern 'lly' from '/usr/share/dict/words' in linux and I can display them in the browser. I want to count how many words that matches the pattern and display the total at the end of output. This is my php script.

<?php
$dfile = fopen("/usr/share/dict/words", "r");
while(!feof($dfile)) {
$mynextline = fgets($dfile);
if (preg_match("/lly/", $mynextline)) echo "$mynextline<br>";
}
?>