in file php-4.1.0/ext/mysql/php_mysql.c line 1365
-------------------------------
Z_STRLEN_P(return_value) = mysql_escape_string(Z_STRVAL_P(return_value), Z_STRVAL_PP(str), Z_STRLEN_PP(str));
-------------------------------
could you change from
mysq_escape_string into mysql_
to something like
#if MYSQL_VERSION_ID < 32321
        len = mysql_escape_string(out, in, size);
#else
        if (self) {
                check_connection(self);
                len = mysql_real_escape_string(&(self->connection), out, in, size);
        }
        else
                len = mysql_escape_string(out, in, size);
#endif

(quote from mysql python module)