title: How to measure speed of php scripts independantly of eachother? Various Methods?
body: <p>On my website various php codes run from various programmers from whom I have bought project scripts. Some use a session ( session start etc...)
  Some use external include php files and do their math within there and return or echo some things. Some run only when asked to, like the search script.</p>
  
  <p><code>Is there an easy way for me to monitor, temporary, all the various scripts's their delays in millisecond sothat I can see whats going on below the water?</code></p>
  
  <p>I have seen once a programmer making something and below the page there were these long listst of sentences and various ms numbers etc.</p>
  
  <p><strong>Q1. Is there a default php function for this?</strong> How do I call/toggle this?<br>
  <strong>Q2. What are the various methods</strong> with which such calculations are made?<br>
  <strong>Q3. How reliable are they?</strong> are those milliseconds theory or actual real world result?</p>
  
  <p>Thanks for your insight!
  Sam</p>