title: Execute command line via php?
body: <p>How I can execute those two command line via php:</p>
  
  <p>wkhtmltopdf www.google.com gg.pdf </p>
  
  <p>&amp;</p>
  
  <p>oofice -headless -nologo -pt cup-pdf my.doc</p>
  
  <p>they both return a pdf file and download into my home directory.</p>
  
  <p>I want to know the way to execute those command from my html page via php.</p>
  
  <p>Thanks.</p>