title: Is this effect possible with php code, without special software
body: <p>I've learned to never underestimate what PHP and some libraries can do, so for this paper effect, can it be done with a php graphics library (or at least programmatically) without needing something like Photoshop or Illustrator?</p>
  
  <p>To be clear, I'm asking just about the paper, not the iphone.</p>
  
  <p><strong>Edit:</strong> Dan Grossman's answer is great. I'm also wondering if someone can give me algorithmic ideas what might be happening in this image so I could try to possibly come up with some code to map it mathematically. My visual imagination is failing me a little.</p>
  
  <p><img src="https://i.stack.imgur.com/TwH7v.jpg" alt="enter image description here"></p>