PHP练习2 数据的存储与检索

本练习实现订单内容写入文本文件、并读取订单内容。

1、orderform.html

<!DOCTYPE html>
<html>
  <head>
   <title>Bob's Auto Parts - Order Form</title>
  </head>
  <body>
    <form action="processorder.php" method="post">
    <table style="border: 0px;">
    <tr style="background: #cccccc;">
      <td style="width: 150px; text-align: center;">Item</td>
      <td style="width: 15px; text-align: center;">Quantity</td>
    </tr>
    <tr>
      <td>Tires</td>
      <td><input type="text" name="tireqty" size="3" maxlength="3" /></td>
    </tr>
    <tr>
     <td>Oil</td>
     <td><input type="text" name="oilqty" size="3" maxlength="3" /></td>
    </tr>
    <tr>
     <td>Spark Plugs</td>
     <td><input type="text" name="sparkqty" size="3" maxlength="3" /></td>
    </tr>
    <tr>
      <td>Shipping Address</td>
      <td><input type="text" name="address" size="50" maxlength="100"</td>
    </tr>    
    <tr>
     <td colspan="2" style="text-align: center;"><input type="submit" value="Submit Order" /></td>
    </tr>
    </table>
    </form>
  </body>
</html>

前台页面：

PHP练习2 数据的存储与检索

2、processorder.php （按提交按钮后将订单写入订单文件orders.txt）

<?php
  // create short variable names
  $tireqty = (int) $_POST['tireqty'];
  $oilqty = (int) $_POST['oilqty'];
  $sparkqty = (int) $_POST['sparkqty'];
  $address = preg_replace('/\t|\R/',' ',$_POST['address']);
  $document_root = $_SERVER['DOCUMENT_ROOT'];
  $date = date('H:i, jS F Y');
?>
<!DOCTYPE html>
<html>
  <head>
    <title>Bob's Auto Parts - Order Results</title>
  </head>
  <body>
    <h1>Bob's Auto Parts</h1>
    <h2>Order Results</h2> 
    <?php
      echo "<p>Order processed at ".date('H:i, jS F Y')."</p>";
      echo "<p>Your order is as follows: </p>";

      $totalqty = 0;
      $totalamount = 0.00;

      define('TIREPRICE', 100);
      define('OILPRICE', 10);
      define('SPARKPRICE', 4);

      $totalqty = $tireqty + $oilqty + $sparkqty;
      echo "<p>Items ordered: ".$totalqty."<br />";

      if ($totalqty == 0) {
        echo "You did not order anything on the previous page!<br />";
      } else {
        if ($tireqty > 0) {
          echo htmlspecialchars($tireqty).' tires<br />';
        }
        if ($oilqty > 0) {
          echo htmlspecialchars($oilqty).' bottles of oil<br />';
        }
        if ($sparkqty > 0) {
          echo htmlspecialchars($sparkqty).' spark plugs<br />';
        }
      }


      $totalamount = $tireqty * TIREPRICE
                   + $oilqty * OILPRICE
                   + $sparkqty * SPARKPRICE;

      echo "Subtotal: $".number_format($totalamount,2)."<br />";

      $taxrate = 0.10;  // local sales tax is 10%
      $totalamount = $totalamount * (1 + $taxrate);
      echo "Total including tax: $".number_format($totalamount,2)."</p>";

      echo "<p>Address to ship to is ".htmlspecialchars($address)."</p>";

      $outputstring = $date."\t".$tireqty." tires \t".$oilqty." oil\t"
                      .$sparkqty." spark plugs\t\$".$totalamount
                      ."\t". $address."\n";

       // open file for appending
       $fp = fopen("$document_root/orders/orders.txt", 'ab');

       if (!$fp) {
         echo "<p><strong> Your order could not be processed at this time.
               Please try again later.</strong></p>";
         exit;
       }

       flock($fp, LOCK_EX);
       fwrite($fp, $outputstring, strlen($outputstring));
       flock($fp, LOCK_UN);
       fclose($fp);

       echo "<p>Order written.</p>";
    ?>
  </body>
</html>

前台页面提交后显示：

PHP练习2 数据的存储与检索

3、 vieworders.php （实现读取订单文件）

<?php
  // create short variable name
  $document_root = $_SERVER['DOCUMENT_ROOT'];
?>
<!DOCTYPE html>
<html>
  <head>
    <title>Bob's Auto Parts - Customer Orders</title>
  </head>
  <body>
    <h1>Bob's Auto Parts</h1>
    <h2>Customer Orders</h2> 
    <?php
      @$fp = fopen("$document_root/orders/orders.txt", 'rb');
      flock($fp, LOCK_SH); // lock file for reading

      if (!$fp) {
        echo "<p><strong>No orders pending.<br />
              Please try again later.</strong></p>";
        exit;
      }

      while (!feof($fp)) {
         $order= fgets($fp);
         echo htmlspecialchars($order)."<br />";
      }

      flock($fp, LOCK_UN); // release read lock
      fclose($fp); 
    ?>
  </body>
</html>

前台订单内容展示：

PHP练习2 数据的存储与检索

4. $document_root/orders/orders.txt 订单文件内容如下：

orders.txt

18:55, 16th April 2013 4 tires 1 oil 6 spark plugs $477.4 22 Short St, Smalltown
18:56, 16th April 2013 1 tires 0 oil 0 spark plugs $110 33 Main Rd, Oldtown
18:57, 16th April 2013 0 tires 1 oil 4 spark plugs $28.6 127 Acacia St,Springfield
05:00, 28th September 2018 3 tires 3 oil 3 spark plugs $376.2 3
09:03, 28th September 2018 1 tires 1 oil 1 spark plugs $125.4 china

PHP练习2 数据的存储与检索

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