SYNOPSIS
	int strstr (string str, string str2, int pos)

DESCRIPTION
	Returns the index of str2 in str searching from position pos.
	If str2 is not found in str, -1 is returned. The returned
	index is relativ to the pos parameter, not to the beginning of
	the string.

SEE ALSO
	strlen(E), sscanf(E), sprintf(E), explode(E)