Connect to the database using PDO

PDO (PHP Data Objects) is a lightweight, compatible with a data connection interface PHP development, PHP is an official of the PECL repository, with PHP 5.1 release, you need to support object-oriented PHP 5, so the earlier version Not available. It provides data access abstraction layer, has nothing to do with the specific database type, will provide a unified user interface for the database it supports. Currently supports a variety of databases. Since PDO is a unified interface to the underlying implementation of the database operation, so it is possible to use more advanced database operations, such as scheduling a stored procedure.

Create a database configuration file config.php

<? PHP 
DEFINE ( ' DB_HOST ' , ' localhost ' ); // constant, hostname 
DEFINE ( ' DB_USER ' , ' the root ' ); // User name database connected 
DEFINE ( ' DB_PWD ' , ' the root ' ); / / connect to the database password 
DEFINE ( ' the DB_NAME ' , ' Book ' ); // database name 
DEFINE ( ' DB_PORT ' , '3306' ); // port number 
DEFINE ( ' db_type ' , ' MySQL ' ); // type database 
DEFINE ( ' db_charset ' , ' UTF8 ' ); // encoding format database 
DEFINE ( ' DB_DSN ' , db_type. " : = Host " .DB_HOST. " ; dbname = " .DB_NAME. " ; charset = " .DB_CHARSET); // define the PDO DSN 
>?

Create a index.php file, connect to a database, execute a query, and the introduction of the config.php file

<? PHP
 the require "the config.php" ; 

the try {
     // connect to the database, select the database 
    $ PDO = new new the PDO (DB_DSN, DB_USER, DB_PWD); 
} the catch (PDOException $ E ) {
     // output abnormality information 
    echo  $ E -> getMessage (); 
} 

$ Query = "Books from the SELECT * the WHERE the above mentioned id =?"; // SQL statement 
$ STH = $ PDO -> pREPARE ( $ Query ); // ready to execute 
$ STH -> the execute ( Array (1) ); // execute a query and returns the result set

//var_dump($sth->fetchColumn(1));
//var_dump($sth->fetchColumn(1));
//$res = $sth->fetch(PDO::FETCH_OBJ);
include("lists_02.html");

Creating list.html file, display query information.

<!DOCTYPE html>
<html lang="en" class="is-centered is-bold">
<head>
    <meta charset="UTF-8">
    <title>连接数据库</title>
    <link href="css/bootstrap.css" rel="stylesheet">
    <style>
        #name,#id{
            width: 200px;
            margin-top: 10px;
        }
    </style>
</head>
<body>
<div class="container" style="padding-top: 20px">
    <div class="col-sm-offset-2 col-sm-8">
        <div class="panel panel-default">
            <div class="panel-heading">
                图书列表
            </div>
            <div class="panel-body">
                <table class="table table-striped task-table">
                    <thead > 
                        < TR > 
                            < TH > ID </ TH > 
                            < TH > book named </ TH > 
                            < TH > Author </ TH > 
                            < TH > Price </ TH > 
                            < TH > Publication Date </ TH > 
                            < TH > operation </ TH > 
                        </ TR > 
                    </ thead > 
                    < tbody >
                        <! -$getData数组的值也是数组-->
                        <?php while ($res = $sth->fetch(PDO::FETCH_OBJ)){ ?>
                        <tr>
                            <td class="table-text">
                                <?php echo $res->id ?>
                            </td>
                            <td class="table-text">
                                <?php echo $res->name ?>
                            </td>
                            <td class="table-text">
                                <?php echo $res->author ?>
                            </td>
                            <td class="table-text">
                                <?php echo $res->price ?>
                            </td>
                            <td class="table-text">
                                <?php echo $res->publishDate ?>
                            </td>
                            <td class="table-text">
                                <button type="button" class="btn btn-primary">编辑</button>
                                <button type="button" class="btn btn-danger">删除</button>
                            </td>
                        </tr>
                        <?php } ?>
                    </tbody>
                </table>
            </div>

        </div>
    </div>
</div>
<script src="http://code.jquery.com/jquery-1.7.2.min.js"></script>
</body>
</html>

Connect to the database using PDO

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