-3

以下是我试图在其中创建数据库连接的代码。请参阅下面的代码中的注释,其中我提到了问题发生的确切位置。此外,我还提到了一个运行良好的连接代码。

请让我知道如何调用 my dbconfig.php,以便它的行为类似于导致成功连接的那段代码。

谢谢

<?php

//Including Header file for the connectivity to the database
require_once('Connections/dbconfig.php');

  mysql_select_db($database_dbconfig, $dbconfig);
  // If I use the following line of code for connectivity then it works perfectly fine:
  //$dbh = new PDO('mysql:host=localhost;dbname=rare','root','');
  $dbh= $dbconfig;
  $q = 'select resident_id,u_first,u_last from z_events group by resident_id';
  /*
  The following error will occur when I try to make a connection from the header file:
  Fatal error: Call to a member function prepare() on a non-object in C:\Users\QAD\Downloads\CAR\index12 - Copy.php on line 200 
  */
  $user = $dbh->prepare($q);
  $user->execute();
?>

数据库配置文件

<?php
# FileName="Connection_php_mysql.htm"
# Type="MYSQL"
# HTTP="true"
$hostname_dbconfig = "localhost";
$database_dbconfig = "rare";
$username_dbconfig = "root";
$password_dbconfig = "";
$dbconfig = mysql_pconnect($hostname_dbconfig, $username_dbconfig, $password_dbconfig) or trigger_error(mysql_error(),E_USER_ERROR); 
?>
4

3 回答 3

3

您将 mysql_* 函数与 PDO 函数混合使用 - 首先使用 mysql_connect 连接到您的数据库,然后使用 prepare() 查询您的数据库。

您应该完全移至 PDO,替换此行:

$dbconfig = mysql_pconnect($hostname_dbconfig, $username_dbconfig, $password_dbconfig) or trigger_error(mysql_error(),E_USER_ERROR); 

有了这个:

$dbconfig = new PDO('mysql:dbname=' . $database_dbconfig . ';host=127.0.0.1', $username_dbconfig, $password_dbconfig);

并将其放入您的另一个文件中:

<?php

//Including Header file for the conectivity to the database
require_once('Connections/dbconfig.php');

  $dbh = $dbconfig;
  $q = 'select resident_id,u_first,u_last from z_events group by resident_id';
  $user = $dbh->prepare($q);
  $user->execute();
?>
于 2012-06-01T11:04:43.637 回答
3

试试这个

$connection = mysql_connect("localhost","root","") or die(mysql_error());
$db = mysql_select_db("database_name") or die(mysql_error());
于 2016-09-19T06:30:03.210 回答
-1

将您的数据库选择更改为此

mysql_select_db($database_dbconfig);
于 2012-06-01T11:04:56.680 回答