title: Paypal REST API, how to do?
body: <p>i am quite new in paypal REST API, I'm using php, framework codeigniter.<br>
  I'm sorry, i don't quite understand what this means.</p>
  
  <pre><code>curl -v https://api.sandbox.paypal.com/v1/oauth2/token \
  -H "Accept: application/json" \
  -H "Accept-Language: en_US" \
  -u "EOJ2S-Z6OoN_le_KS1d75wsZ6y0SFdVsY9183IvxFyZp:EClusMEUk8e9ihI7ZdVLF5cZ6y0SFdVsY9183IvxFyZp" \
  -d "grant_type=client_credentials"
  </code></pre>
  
  <p>i couldn't find any related thing about how to read this. and how to apply this in php cURL</p>
  
  <p>thanks</p>