Returns part of
haystack string from the first occurrence of needle to the end of haystack.
If needle is not
found, returns FALSE.
If needle is not a
string, it is converted to an integer and applied as the
ordinal value of a character.
注: This function is case-sensitive. For case-insensitive searches, use stristr().
注: If you only want to determine if a particular needle occurs within haystack, use the faster and less memory intensive function strpos() instead.
See also ereg(),
preg_match(), strchr(),
stristr(), strpos(),
strrchr(), and
substr().