title: PHP Multidimensional Array Length
body: <p>This is a multidimensional PHP array. </p>
  
  <pre><code>$stdnt = array(
      array("Arafat", 12210261, 2.91),
      array("Rafat", 12210262, 2.92),
      array("Marlin", 12210263, 2.93),
      array("Aziz", 12210264, 2.94),
  );
  </code></pre>
  
  <p>I can find out the length of the array. That means</p>
  
  <pre><code>count($stdnt); // output is 4
  
  [
      array("Arafat", 12210261, 2.91),
      array("Rafat", 12210262, 2.92),
      array("Marlin", 12210263, 2.93),
      array("Aziz", 12210264, 2.94)
  ] ` 
  </code></pre>
  
  <p>But can't get the internal array length.</p>
  
  <p>How can I ?</p>