PHP练习5 从WEB访问MySQL数据库

数据库的设计参见上篇《MySQL创建WEB数据库books》

从web 查询数据库

1.search.html

<html>
<head>
  <title>Book-O-Rama Catalog Search</title>
</head>

<body>
  <h1>Book-O-Rama Catalog Search</h1>

  <form action="results.php" method="post">
    Choose Search Type:<br />
    <select name="searchtype">
      <option value="author">Author
      <option value="title">Title
      <option value="isbn">ISBN
    </select>
    <br />
    Enter Search Term:<br />
    <input name="searchterm" type="text" size="40">
    <br />
    <input type="submit" name="submit" value="Search">
  </form>

</body>
</html>

输入测试

2.results.php

<html>
<head>
  <title>Book-O-Rama Search Results</title>
</head>
<body>
<h1>Book-O-Rama Search Results</h1>
<?php
  // create short variable names
  $searchtype=$_POST['searchtype'];
  $searchterm=trim($_POST['searchterm']);

  if (!$searchtype || !$searchterm) {
     echo 'You have not entered search details.  Please go back and try again.';
     exit;
  }

  if (!get_magic_quotes_gpc()){
    $searchtype = addslashes($searchtype);
    $searchterm = addslashes($searchterm);
  }

  @ $db = new mysqli('www.anyone.com', 'bookorama', 'bookorama123', 'books');

  if (mysqli_connect_errno()) {
     echo 'Error: Could not connect to database.  Please try again later.';
     exit;
  }

  $query = "select * from books where ".$searchtype." like '%".$searchterm."%'";
  $result = $db->query($query);

  $num_results = $result->num_rows;

  echo "<p>Number of books found: ".$num_results."</p>";

  for ($i=0; $i <$num_results; $i++) {
     $row = $result->fetch_assoc();
     echo "<p><strong>".($i+1).". Title: ";
     echo htmlspecialchars(stripslashes($row['title']));
     echo "</strong><br />Author: ";
     echo stripslashes($row['author']);
     echo "<br />ISBN: ";
     echo stripslashes($row['isbn']);
     echo "<br />Price: ";
     echo stripslashes($row['price']);
     echo "</p>";
  }

  $result->free();
  $db->close();

?>
</body>
</html>

从web 插入数据到数据库

a. newbook.html

<html>
<head>
  <title>Book-O-Rama - New Book Entry</title>
</head>

<body>
  <h1>Book-O-Rama - New Book Entry</h1>

  <form action="insert_book.php" method="post">
    <table border="0">
      <tr>
        <td>ISBN</td>
         <td><input type="text" name="isbn" maxlength="13" size="13"></td>
      </tr>
      <tr>
        <td>Author</td>
        <td> <input type="text" name="author" maxlength="30" size="30"></td>
      </tr>
      <tr>
        <td>Title</td>
        <td> <input type="text" name="title" maxlength="60" size="30"></td>
      </tr>
      <tr>
        <td>Price $</td>
        <td><input type="text" name="price" maxlength="7" size="7"></td>
      </tr>
      <tr>
        <td colspan="2"><input type="submit" value="Register"></td>
      </tr>
    </table>
  </form>
</body>
</html>

输入数据

b. insert_book.php

<html>
<head>
  <title>Book-O-Rama Book Entry Results</title>
</head>
<body>
<h1>Book-O-Rama Book Entry Results</h1>
<?php
  // create short variable names
  $isbn=$_POST['isbn'];
  $author=$_POST['author'];
  $title=$_POST['title'];
  $price=$_POST['price'];

  if (!$isbn || !$author || !$title || !$price) {
     echo "You have not entered all the required details.<br />"
          ."Please go back and try again.";
     exit;
  }

  if (!get_magic_quotes_gpc()) {
    $isbn = addslashes($isbn);
    $author = addslashes($author);
    $title = addslashes($title);
    $price = doubleval($price);
  }

  @ $db = new mysqli('www.anyone.com', 'bookorama', 'bookorama123', 'books');

  if (mysqli_connect_errno()) {
     echo "Error: Could not connect to database.  Please try again later.";
     exit;
  }

  $query = "insert into books values
            ('".$isbn."', '".$author."', '".$title."', '".$price."')";
  $result = $db->query($query);

  if ($result) {
      echo  $db->affected_rows." book inserted into database.";
  } else {
  	  echo "An error has occurred.  The item was not added.";
  }

  $result->free();
  $db->close();
?>
</body>
</html>

查看结果：

mysql> select * from books;
+---------------+----------------+---------------------------------------------------+-------+
| isbn          | author         | title                                             | price |
+---------------+----------------+---------------------------------------------------+-------+
| 0-672-31509-2 | Pruitt, et al. | Teach Yourself GIMP in 24 Hours                   | 24.99 |
| 0-672-31697-8 | Michael Morgan | Java 2 for Professional Developers                | 34.99 |
| 0-672-31745-1 | Thomas Down    | Installing Debian GNU/Linux                       | 24.99 |
| 0-672-31769-9 | Thomas Schenk  | Caldera OpenLinux System Administration Unleashed | 49.99 |
| 2-333-1       | michael        | Bible                                             | 10.00 |
+---------------+----------------+---------------------------------------------------+-------+
5 rows in set (0.00 sec)

PHP练习5 从WEB访问MySQL数据库

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