PHP练习3 数组随机排序

使用shuffle()函数随机排序

bobs_front_page.php

<?php
  $pictures = array('brakes.png', 'headlight.png', 
                    'spark_plug.png', 'steering_wheel.png', 
                    'tire.png', 'wiper_blade.png');

  shuffle($pictures);
?>
<!DOCTYPE html>
<html>
  <head>
    <title>Bob's Auto Parts</title>
  </head>
  <body>
    <h1>Bob's Auto Parts</h1>
     <div align="center">
      <table style="width: 100%; border: 0">
        <tr>
        <?php
       for ($i = 0; $i < 3; $i++) {
          echo "<td style=\"width: 33%; text-align: center\">
          <img src=\"$pictures[$i]\"/></td>";
        } 
        ?>
        </tr>
     </table>
     </div>
  </body>
</html>

用数组方式显示订单内容（orders.txt）

<?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
    $orders= file("$document_root/orders/orders.txt");

    $number_of_orders = count($orders);
    if ($number_of_orders == 0) {
      echo "<p><strong>No orders pending.<br />
            Please try again later.</strong></p>";
    }
 
    for ($i=0; $i<$number_of_orders; $i++) {
      echo $orders[$i]."<br />";
    }
    ?>
  </body>
</html>

数组元素格式化输出：

<?php
  // create short variable name
  $document_root = $_SERVER['DOCUMENT_ROOT'];
?>
<!DOCTYPE html>
<html>
  <head>
    <title>Bob's Auto Parts - Customer Orders</title>

    <style type="text/css">
    table, th, td {
      border-collapse: collapse;
      border: 1px solid black;
      padding: 6px;
    }

    th {
      background: #ccccff;      
    }
    </style>

  </head>
  <body>
    <h1>Bob's Auto Parts</h1>
    <h2>Customer Orders</h2> 

    <?php
      //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 "<p><strong>No orders pending.<br />
              Please try again later.</strong></p>";
      }
    
      echo "<table>\n";
      echo "<tr>
              <th>Order Date</th>
              <th>Tires</th>
              <th>Oil</th>
              <th>Spark Plugs</th>
              <th>Total</th>
              <th>Address</th>
            <tr>";
    
      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 "<tr>
              <td>".$line[0]."</td>
              <td style=\"text-align: right;\">".$line[1]."</td>
              <td style=\"text-align: right;\">".$line[2]."</td>    
              <td style=\"text-align: right;\">".$line[3]."</td>
              <td style=\"text-align: right;\">".$line[4]."</td>
              <td>".$line[5]."</td>
          </tr>";
      }    
      echo "</table>";
    ?>
  </body>
</html>

PHP练习3 数组随机排序

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