Help: A simple code for PHP

Php

This is an example of the PHP and MySQL Web development book, which is intended to explode the order information stored in the file and display it in a table. Why do I only display headers when I run, no tabular data?
Orders.txt is the order information, tab-delimited, has been correctly read into the ers. There seems to be a problem in the for loop behind it.

Bob ' s Auto parts-customer Orders

Bob ' s Auto Parts

Customer Orders

Read the entire file
Each order becomes a element in the array
ers = File ("./orders.txt");

Count the number of orders in the Array_of_orders = count (ers); if (_of_orders = 0) {echo "
No orders pending. Please try again later.
";} echo "
   
   
     \ n "; echo" 
     Oil 
       Total 
      "; for ($i = 0; $i < _of_orders; $i + +) {//split up all line $line = explode ("\ t", ers [$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 other echo " 
     ";} echo " 
    
 
     
 
      
Order Date
 
      
Tires
 
      
Spark Plugs
 
      
Address
 
     
 
      
". $line [0]."
 
      
". $line [1]."
 
      
". $line [2]."
 
      
". $line [3]."
 
      
". $line [4]."
 
      
". $line [5]."
 
     
 
   
";

?>

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