title: Securing a php contact form
body: <p>i have made a simple php contact form following this tutorial:
  <a href="http://www.catswhocode.com/blog/how-to-create-a-built-in-contact-form-for-your-wordpress-theme" rel="nofollow">http://www.catswhocode.com/blog/how-to-create-a-built-in-contact-form-for-your-wordpress-theme</a></p>
  
  <p>The big problem is that this form processing is not safe, I have heard people can use it to send spam and/or hack my server.</p>
  
  <p><strong>What are the basic steps needed to make this form more secure?</strong>
  Ps: I don't want to use re-captcha if it can be avoided...</p>
  
  <p><strong>Edit:</strong> I need suggestions to what php functions are used to filter and secure that the form is submitted "the right way" and not altered and/or used to hack my site or send email to other people (using the site to send spam to other people). Do i just need to use strip_slashes? or is there a better way?</p>