[Mugala]

you both have some serious mistakes in code.
it must be written before loop, like this:

PHP код:

CMD:admins(playerid,params[])
{
    new string[1000],astring[50],count,admin[80]; // this must be here (up before loop)
    for(new i=0;i<MAX_PLAYERS;i++)
    {
        if(PlayerInfo[i][pAdmin] >= 1 && PlayerInfo[i][pAdminHide] == 0)
        {
            if(PlayerInfo[i][pAdmin] == 1) { admin = "Admin level [ 1 ]"; }
            else if(PlayerInfo[i][pAdmin] == 4) { admin = "Admin level [ 4 ]"; }
            else if(PlayerInfo[i][pAdmin] == 2) { admin = "Admin level  [ 2 ]"; }
            else if(PlayerInfo[i][pAdmin] == 3) { admin = "Admin level  [ 3 ]"; }
            else if(PlayerInfo[i][pAdmin] == 6) { admin = "[ CO-OWNER ]";}
            else if(PlayerInfo[i][pAdmin] == 7) { admin = "[ OWNER]";}
            else if(PlayerInfo[i][pAdmin] == 5) { admin = "[ HEAD-ADMIN]";}
            format(string,1000,"%s {FFFFFF}%s {FF0000}%s[ID: %d]\n",string,admin,PlayerName(i),i);
            count++;
            format(astring,sizeof(astring),"Online admins(%d):",count);
        }
    }
    if(count >=1)
    {
        ShowPlayerDialog(playerid, 21323123, DIALOG_STYLE_MSGBOX, astring, string, "{FFFFFF}Close","");
    }
    else
    {
        SendClientMessage(playerid,0xFF0000FF,"there are no online admins!" );
        return 1;
    }
    return 1;
} 


p.s. also using lower dialog id will be better.