Sending EOF message

[vitoto9010]

Hello, im new at serial connection, and i have a device which use AT Command. We're trying to send an EOF message (or ctrl+z i believe). How do you write an EOF message on PHP? we've tried chr(26) and \x1a but not success, Thank You

[vitoto9010]

this is what im supposed to do (at least with hyper terminal)

AT+CMGS="PHONE NUMBER"
(the symbol >)MESSAGE (AFTER THE ABOVE COMMAND IT GIVE > AS A PROMPT)
THEN TO SEND YOU NEED TO HIT CTRL-Z AND ENTER

but after i send CMGS, there is no output when i read

Thanks