cpp
#define MAX_PLAYERS 1000
new bool ignored[MAX_PLAYERS][MAX_PLAYERS];

public OnPlayerCommandText(playerid, cmdtext[]) {
    new player2id;
    if (sscanf(cmdtext, "/ignore %d", player2id) == 1) {
        ignored[playerid][player2id] = true;
        SendClientMessage(playerid, COLOR_GREEN, "You are now ignoring player %d.", player2id);
    }
    return 1;
}

public OnPlayerSpeak(playerid, text[]) {
    for (new i = 0; i < MAX_PLAYERS; i++) {
        if (IsPlayerConnected(i) && ignored[i][playerid]) {
            return 1;
        }
    }
    // Player is not ignored, send their message to all other players
    SendClientMessageToAll(COLOR_WHITE, "[%s]: %s", GetPlayerName(playerid), text);
    return 1;
}