Question

This is driving me nuts, it keeps returning 0

substr_count('df
d
fd
f
df', '\n');

if I use a letter like “d”, it works fine

substr_count('df
d
fd
f
df', 'd');

Can anyone shed some light on this?

Thanks

Answer 1

You need to use double quotes for control characters:

var_dump(substr_count('df
d
fd
f
df', "\n"));