title: How to check if a certain coordinates fall to another coordinates radius using PHP only
body: <p>I have seen so many functions but it happens to work only for MySQL or Postgresql. I want the equivalent logic for PHP. I'm doing some comparisons,
  like I have this data that were being produced when created.</p>
  
  <pre><code>Lat: 56.130366
  Long: -106.34677099999
  </code></pre>
  
  <p>Later on, I want to check if this coordinates will fall within a radius of another coordinates.</p>
  
  <pre><code>Lat: 57.223366
  Long: -106.34675644699
  radius: 100000 ( meters )
  </code></pre>
  
  <p>Thanks in advance!</p>