title: Finding the position of an element in a simple array
body: <p>Let's say we have this array:</p>
  
  <pre><code>Array ( [0] =&gt; 10 [1] =&gt; 45 [2] =&gt; 23 ) 
  </code></pre>
  
  <p>How can I determine the position of element '45' in this array?</p>
  
  <p>I'm using PHP.</p>
  
  <p>Thank you. </p>