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 beginning of the string.

        If pos is negativ, it counts from the end of the string.

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