MF51: use proper macros and vars instead of strlen()

ext/mysqli/mysqli_api.c

@@ -571,7 +571,7 @@ PHP_FUNCTION(mysqli_stmt_execute)
 					case MYSQL_TYPE_VAR_STRING:
 						convert_to_string_ex(&stmt->param.vars[i]);
 						stmt->stmt->params[i].buffer = Z_STRVAL_PP(&stmt->param.vars[i]);
-						stmt->stmt->params[i].buffer_length = strlen(Z_STRVAL_PP(&stmt->param.vars[i]));
+						stmt->stmt->params[i].buffer_length = Z_STRLEN_PP(&stmt->param.vars[i]);
 						break;
 					case MYSQL_TYPE_DOUBLE:
 						convert_to_double_ex(&stmt->param.vars[i]);

ext/mysqli/mysqli_nonapi.c

@@ -75,7 +75,7 @@ PHP_FUNCTION(mysqli_connect)
 	}
 
 #ifdef HAVE_EMBEDDED_MYSQLI
-	if (hostname && strlen(hostname)) {
+	if (hostname_len && hostname) {
 		unsigned int external=1;
 		mysql_options(mysql->mysql, MYSQL_OPT_USE_REMOTE_CONNECTION, (char *)&external);
 	} else {