PHP试图计算段落之间的空格

I have been trying to make a PHP code that counts the lines of text stored in a .txt file in a way so as it counts the total lines and the total spaces between paragraph's then echoes out each value along with a (Total Lines-Total Spaces) value at the end of the script unfortunately I can't get it to count spaces my current code looks like this: I have been trying to make a PHP code that coun