PHP: direct call another PHP web applications without going through the usual HTTP call
<p>I have two PHP web applications. All of the apps are located on the same computer. Each application will run independently.</p>

<p>Now, can I do a direct API call from one PHP app to another? I don't want to go through either the webservice, or the usual HTTP call that involves HTML response. I want to call app A from app B, using direct method call, as if those two apps are the same application.</p>

<p>How to do this?</p>
