title: executing GPIO python from browser in PI
body: <p>Im trying to execute a php script that invokes a python program to control GPIO pins in Raspberry Pi. i'm able to get it work by running it in the terminal. But when i run it from midori browser im not able to get it work...pls help me out 
  the below is the php code...!</p>
  
  <pre><code>&lt;?php
      echo "Executing Python";
      exec("python /usr/bin/Light.py");
   ?&gt; 
  </code></pre>
  
  <p>the following is the python code</p>
  
  <pre><code>import RPi.GPIO as GPIO
   import time
  
   def blink(pin):
  
  GPIO.output(pin,True)
  
     time.sleep(1)
  
  GPIO.output(pin,False)
  
  time.sleep(1)
  
  return
  
  GPIO.setup(11,GPIO.OUT)
  
  for i in range(0,20):
  
    blink(11)
  
   cleanup()
  </code></pre>
  
  <p>Thanks in advance !</p>