[Marttt]

Try this.

#include <sourcemod>
#include <multicolors>

#define PLUGIN_VERSION "1.1.0"

public Plugin myinfo =
{
    name = "Server Info",
    author = "EmreBulut",
    description = "Shows info about server.",
    version = PLUGIN_VERSION,
    url = "http://steamcommunity.com/id/emrebulut"
}
public OnClientPutInServer(client)
{
    CreateTimer(5.0, WelcomeMsg, client);
    
}

public Action:WelcomeMsg(Handle:timer, any:client)
{
    CMD_Info(client, 0);
}

public Action:CMD_Info(client, args)
{
    char sBuffer[256];
    GetConVarString(FindConVar("hostname"), sBuffer,sizeof(sBuffer));
    CPrintToChat(client, "{darkred}Server name :{default} %s", sBuffer)

    int pieces[4];
    int longip = GetConVarInt(FindConVar("hostip"));
    int port = GetConVarInt(FindConVar("hostport"));
    pieces[0] = (longip >> 24) & 0x000000FF;
    pieces[1] = (longip >> 16) & 0x000000FF;
    pieces[2] = (longip >> 8) & 0x000000FF;
    pieces[3] = longip & 0x000000FF;

    char NetIP[32];
    Format(NetIP, sizeof(NetIP), "%d.%d.%d.%d:%d", pieces[0], pieces[1], pieces[2], pieces[3], port);  
    CPrintToChat(client, "{darkred}==============================================");
    CPrintToChat(client, "{darkred}Server IP: {default}%d.%d.%d.%d:%d", pieces[0], pieces[1], pieces[2], pieces[3], port)
    
    decl String:AdminNames[MAXPLAYERS+1][MAX_NAME_LENGTH+1];
    new count = 0;
    for(new i = 1 ; i <= MaxClients;i++)
    {
        if(IsClientInGame(i))
        {
            new AdminId:AdminID = GetUserAdmin(i);
            if(AdminID != INVALID_ADMIN_ID)
            {
                GetClientName(i, AdminNames[count], sizeof(AdminNames[]));
                count++;
            }
        } 
    }
    decl String:buffer[1024];
    ImplodeStrings(AdminNames, count, ",", buffer, sizeof(buffer));
    CPrintToChat(client, "{darkred}Online admins:{default} %s", buffer);

    GetNextMap(sBuffer, sizeof(sBuffer));
    CPrintToChat(client, "{darkred}Next map:{default} %s", sBuffer)

    GetCurrentMap(sBuffer, sizeof(sBuffer));
    CPrintToChat(client, "{darkred}Current map:{default} %s", sBuffer)

    int i_Minutes;
    int i_Seconds;
    int i_Time;
    if(GetMapTimeLeft(i_Time) && i_Time > 0)
    {
        i_Minutes = i_Time / 60;
        i_Seconds = i_Time % 60;
    }
    Format(sBuffer, sizeof(sBuffer), "%d:%02d", i_Minutes, i_Seconds);
    CPrintToChat(client, "{DarkRed}Timeleft:{default} %s", sBuffer)
}

stock bool IsValidPlayer(int client, bool alive = false)
{
    if(client >= 1 && client <= MaxClients && IsClientConnected(client) && IsClientInGame(client) && (alive == false || IsPlayerAlive(client)))
    {
        return true;
    }
    return false;
}
stock bool IsPlayerAdmin(client)
{
    if (GetAdminFlag(GetUserAdmin(client), Admin_Generic))
    {
        return true;
    }
    return false;
}