system() in php

[Marvin_G]

hello guys, i'm using system() command in php to execute command in terminal through php but it seems like there's a problem occured. Below is the simple code in php

<?php$command = system('perl -e' print "\xF5\x01\x00\x01\x03\x00\x03\xF5"'>/dev/ttyUSB0 '); ?>

it suppose send command to the serial port and light up my LED but it seems like nothing happened. Please share your idea guys. Thank you.

[Ingolme]

Have you checked the value of $command to see if it worked? Actually, notice that random "print" command in your function. That's likely to give a syntax error. Check that your strings are properly quoted.

[Marvin_G]

Have you checked the value of $command to see if it worked? Actually, notice that random "print" command in your function. That's likely to give a syntax error. Check that your strings are properly quoted.

i've tried the code in terminal and it works

[jeffman]

Are you using a *nix system? Have you tried exec() or shell_exec() instead of system() ? Does PHP/web user have the correct user permissions?

[justsomeguy]

The code you posted has syntax errors, your quotes are not matched and escaped correctly. You have a single quote after -e which is ending the string.