Error running shell script in php

[jigarshah89]

i have some problem to shell script using php...
my script is file is a.sh:::

#!/bin/sh
 
echo "ATZ0" > /dev/ttyACM0    
echo "AT+CSCA?" > /dev/ttyACM0  
echo "AT+CMGF=1" > /dev/ttyACM0  
echo "AT+CNMI=2,1" > /dev/ttyACM0      
echo "AT+CMGS=\"09924927267\"" > /dev/ttyACM0 
echo "hello\32" > /dev/ttyACM0
 

and my php file is index.php::

<?php
exec("./a.sh");
 
?>
 

i cant run this script...pls help me with this

[Markus]

What do you mean "can't run this script"? What happens? What doesn't happen? What errors do you receive? Have you got error_reporting($level) turned on?

[philipwayne]

Umm your not echoing the output?

 echo exec("./a.sh");