mb_strpos() returns the numeric position of
the first occurrence of needle in the
haystack string. If
needle is not found, it returns FALSE.
mb_strpos() performs multi-byte safe
strpos() operation based on number of
characters. needle position is counted
from the beginning of the haystack. First
character's position is 0. Second character position is 1, and so
on.
If encoding is omitted, internal
character encoding is used.
offset is search offset. If it is not
specified, 0 is used.
encoding is character encoding name. If it
is omitted, internal character encoding is used.
See also mb_strrpos(), mb_internal_encoding(), strpos()