title: String to array of Integers php
body: <p>I wan to convert a string for example 1,2,3,4,5,6 to an array of integers in php?
  I find functions that only have access to the first character of the string for example 1.
  How can I conert the whole string to array?</p>
  
  <pre><code>function read_id_txt()
  {
  
          $handle_file = fopen("temporalfile.txt", 'r'); 
  
          $i=0;
  
          while ($array_var[$i] = fgets($handle_file, 4096)) { 
              echo "&lt;br&gt;";
              print_r($array_var[i]);
              $i++;
          }
  
          fclose($handle_file);   
  
          $temp=explode(" ", $array_var[0]);      
  
          return $temp;   
  
  
  }
  </code></pre>