$ Line [1] = intval ($ line [1]); // What does this write mean?

$ Line [1] = intval ($ line [1]); // What does this write mean? & Lt ;? Php & nbsp; // create & nbsp; short & nbsp; variable & nbsp; name & nbsp; $ DOCUMENT_ROOT & nbsp ;=& nbsp; $ _ SER $ line [1] = intval ($ line [1]); // What does this mean?

   //create short variable name
  $DOCUMENT_ROOT = $_SERVER['DOCUMENT_ROOT'];
?>


  Bob's Auto Parts - Customer Orders


Bob's Auto Parts
Customer Orders

   //Read in the entire file.
  //Each order becomes an element in the array
  $orders= file("$DOCUMENT_ROOT/../orders/orders.txt");

  // count the number of orders in the array
  $number_of_orders = count($orders);

  if ($number_of_orders == 0) {
    echo "
No orders pending.
          Please try again later.
";
  }

  echo "
 
  \n";
  
  echo "
  
   Order Date
   
            
   
    Tires
    
            
    
     Oil
     
            
     
      Spark Plugs
      
            
      
       Total
       
            
       
        Address
        
         ";
        

        
  for ($i=0; $i<$number_of_orders; $i++) {
        
    //split up each line
        
    $line = explode("\t", $orders[$i]);
        

        
    // keep only the number of items ordered
        
    $line[1] = intval($line[1]); 
        
    $line[2] = intval($line[2]);
        
    $line[3] = intval($line[3]);
        

        
    // output each order
        
    echo "
        
             ".$line[0]."
        
             
        
         ".$line[1]."
         
             
         
          ".$line[2]."
          
             
          
           ".$line[3]."
           
             
           
            ".$line[4]."
            
             ".$line[5]."
            
          ";
            
  }
            

            
  echo "";
            
?>
            

            

            

           
          
         
        
       
      
     
    
   
  
 

$ Line [1] = intval ($ line [1]); // What does this write mean? The intval manual describes how intval returns the integer value of the variable var by using a specific hexadecimal conversion (decimal by default. But what is the role of assigning this integer value to $ line [1?
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