The
The meaning of the pattern can be modified by using any combination of these flags:
i
n
n
flag forces the pattern to be treated
as a fixed string.f
f
flag causes mod_substitute to flatten the
result of a substitution allowing for later substitutions to
take place on the boundary of this one. This is the default.q
q
flag causes mod_substitute to not
flatten the buckets after each substitution. This can
result in much faster response and a decrease in memory
utilization, but should only be used if there is no possibility
that the result of one substitution will ever match a pattern
or regex of a subsequent one.If either the pattern or the substitution contain a slash character then an alternative delimiter should be used: