Online PHP editor | output for jCdfm

<?php $argv = ['filename', 3, 1, 100]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n"; $argv = ['filename', 3, 3, 93]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n"; $argv = ['filename', 12, -200, 200]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n"; $argv = ['filename', 123, 1, 3]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n"; $argv = ['filename', 3, 33, 34]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n"; $argv = ['filename', 0, -1, 1]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n"; $argv = ['filename', 127, -12, 27]; echo count(preg_grep('/'.($a=$argv)[1].'/',range($a[2],$a[3]))); echo "\n";