title: How to include a file only if the file exists in PHP?
body: <p>I need an <code>include</code> function / statement that will include a file only if it exists. Is there one in PHP?</p>
  
  <p>You might suggest using <code>@include</code> but there is an issue with that approach - in case the file to be included exists, PHP will not output warnings if the parser find something wrong in the included file.</p>