/getid

#include <a_samp>

public OnPlayerCommandText(playerid, cmdtext[])
{
    if(!strcmp(cmdtext, "/getid", true, 6))
    {
        new
            foundNamesString[128];

        // Can't remember if this compiles in PAWN, might need to use format
        //  new params[] = cmdtext[6];
        new params[128];
        format(params, sizeof(params), "%s", cmdtext[7]);

        if(!(3 < strlen(params) < MAX_PLAYER_NAME)) {
            SendClientMessage(playerid, -1,"Use /getid [name]. Search length must be greater than 3.");
            return 1;
        }

        SendClientMessage(playerid, -1, "Results:");

        for(new i = 0; i < 200; i++) {
            if(!IsPlayerConnected(i) || IsPlayerNPC(i)) {
                continue;
            }
            new name[24];
            GetPlayerName(i,name,24);
            if(strfind(params, name, true) == -1) {
                continue;
            }
            format(foundNamesString, sizeof(foundNamesString), "%s (ID:%i)",name, i);
            SendClientMessage(playerid, -1, foundNamesString);
        }
        if(!strlen(foundNamesString)) {
            SendClientMessage(playerid, -1, "No match found.");
        }
        return 1;
    }
    return 0;
}