substr_count fonksiyonu

Php kodunda ne kadar satır var?

<?php
$sentence = "This is a sentence that has lots 
of

line breaks

in it

for no apparent 

reason!!!";
$numberoflinebreaks = substr_count($sentence,"\n");
echo "There are $numberoflinebreaks line breaks in that sentence";   
?>

There are 9 line breaks in that sentence