-B <begin_code> Run PHP <begin_code> before processing input lines
-R <code> Run PHP <code> for every input line
-F <file> Parse and execute <file> for every input line
-E <end_code> Run PHP <end_code> after processing all input lines
$ find . |
php -B '$l = 0;'
-R '$l+=count(file($argn));'
-E 'echo "Lines: $l\n";'
Lines: 102643