[AndySedeyn]

Doing it like that might be very slow. Keep in mind that for every other file, you have to open, read and close it. And that MAX_OBJECTS times. Though, it's definitely going to be faster to delete them and check if they exist.

Here's an example:

PHP код:

CMD:createobject(playerid, params[]) {

    new
        objectid;

    if(sscanf(params, "d", objectid)) {

        return SendClientMessage(playerid, -1, "USAGE: /createobject <id>");
    }

    new 
        obj = createObj(objectid);

    if(obj == -1) {

        // createObj() has returned -1
        SendClientMessage(playerid, -1, "ERROR: The server has reached its maximum amount of objects.");
    }
    return true;
}

createObj(objectid) {

    new
        tempPath[24];

    for(new i = 0; i < MAX_OBJECTS; i ++) {

        format(tempPath, sizeof(tempPath), "\\objects\\%d.ini", i);
        if(fexist(tempPath)) {

            // Object with ID the value of the current 'i' already exists
            continue;
        }
        new INI:file = INI_Open(tempPath);
        INI_SetTag(file, "objects");
        INI_WriteInt(file, "Object ID", objectid);
        INI_Close(file);
        
        return i;
    }
    return -1;
} 


The example code allows you to keep numbers filled. Example:
> There are three files; 0.ini, 1.ini and 2.ini respectively.
> You remove 1.ini
> You create a new object
> It will save as 1.ini and not as 3.ini

Doing it otherwise may give you trouble when creating objects with the same ID.