bash - execute shell command with php -

im trying execute bash script php/html button wake nas.

<form action="" method="post">     <input type="submit" value="wake nas" name="zero" /> </form> <?php   if (isset($_post["zero"])){     #echo "hello world!";     shell_exec("/var/www/html/wakenas.sh &");   }?> 

"hello world" printed when button pressed. code won't executed. wakenas.sh looks , works if execute on shell

#!/bin/bash etherwake -d "bc:5f:f4:09:e1:07" echo "why!?!?!" > "/var/www/html/works.txt" exit 1 

wakenas.sh has rights

maybe guys know why wont executed.

thanks in advance

from dump:

etherwake: program must run root. 

when execute wakenas.sh executing root. that's why works.

give sudo permission (without password) user php server running.

and change wakenas.sh to:

#!/bin/bash sudo etherwake -d "bc:5f:f4:09:e1:07" echo "why!?!?!" > "/var/www/html/works.txt" exit 1