Something

    if(strcmp(cmd,"/i",true)==0){
new tmp[256];
tmp = strtok(cmdtext,idx);
if(!strlen(tmp)){
SendClientMessage(playerid,COLOR_GRAYWHITE,"USAGE: /i [playerid] [text]");
return 1;
}
new pid = strval(tmp);
if(!IsPlayerConnected(pid)){
SendClientMessage(playerid,COLOR_RED,"That player isn't connected...");
return 1;
}
tmp = strrest(cmdtext,idx);
if(!strlen(tmp)){
SendClientMessage(playerid,COLOR_GRAYWHITE,"USAGE: /i [playerid] [text]");
return 1;
}
format(string,sizeof(string),"*** %s: %s",ReturnPlayerName(pid),tmp);
SendClientMessageToAll(COLOR_LIGHTBLUE,string);
return 1;
}	
return 0;
}
strtok(const string[], &index)
{
	new length = strlen(string);
	while ((index < length) && (string[index] <= ' '))
	{
		index++;
	}

	new offset = index;
	new result[20];
	while ((index < length) && (string[index] > ' ') && ((index - offset) < (sizeof(result) - 1)))
	{
		result[index - offset] = string[index];
		index++;
	}
	result[index - offset] = EOS;
	return result;
}