I have an issue here, i try to use php to send the SMS via my 3G USB modem, as I try to send it with hyperterminal, it works perfectly with COM port number 27.
as I try to fopen COM port 27 it return with the following error message : Warning: fopen(COM27:) [function.fopen]: failed to open stream: Invalid argument in C:\AppServ\www\home\test\sms\com_connect.php on line 4
but if i fopen the COM port 1 to 4, it actually connected to the COM port, which means I can only connect to COM port 1 to 4, from COM5 onward, i wont be able to connect. any idea why ?
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exec("mode COM27 BAUD=9600 PARITY=N data=8 stop=1 xon=off");
$fp = fopen ("COM27:", "w+");
echo "Not open";
P.S. I use the port monitor software to monitor the ports, when I connect to COM port 1-4 it actually receive the request, but it receive nothing when I try COM5 onward.
and I'm running apache on windows. please help. and thank you in advance