Question

我有一个在mysql中完美运行的例子但是当我转换为postgresql时不起作用。

Mysql代码：（index.php）：

<?php 
  require('includes/connection.php'); 
  include('func.php');
?>
<html>
<head>
</head>

<body>
<p>
<form action="" method="post">

    <select name="drop_1" id="drop_1">

      <option value="" selected="selected" disabled="disabled">Select a Category</option>

      <?php getTierOne(); ?>

    </select> 

</form>

</body>
</html>

Mysql代码（func.php）：

function getTierOne()
{       

        $result = mysql_query("SELECT DISTINCT tier_one FROM three_drops") 
or die(mysql_error());

  while($tier = mysql_fetch_array( $result )) 

    {
       echo '<option value="'.$tier['tier_one'].'">'.$tier['tier_one'].'</option>';
    }
}

POstgreSql代码：（index.php）：

<?php 
  require('includes/connection.php'); 
  include('func.php');
?>
<html>
<head>
</head>

<body>
<p>
<form action="" method="post">

    <select name="drop_1" id="drop_1">

      <option value="" selected="selected" disabled="disabled">Select a Category</option>

      <?php getTierOne(); ?>

    </select> 

</form>

</body>
</html>

PostgreSql代码（func.php）：

function getTierOne()
{       

        $sth = $dbh->query("SELECT DISTINCT tier_one FROM three_drops");

      while($tier = $sth->fetch()) 

        {
           echo '<option value="'.$tier['tier_one'].'">'.$tier['tier_one'].'</option>';
        }
}

连接（Postgresql）：

require("constants.php");

    $dbh = new PDO('pgsql:host=' . DB_SERVER . ';dbname=' . DB_NAME, DB_USER, DB_PASS,
    array (PDO::ATTR_PERSISTENT => true ));
    $dbh->setAttribute( PDO::ATTR_ERRMODE, PDO::ERRMODE_EXCEPTION );

连接正常，但是我收到错误：在非对象上调用成员函数query（）。

Answer 1

尝试定义$ dbh global。

connection.php：

require("constants.php");
global $dbh;

func.php：

function getTierOne()
{
  global $dbh;

将mysql转换为postgresql查询

1 个答案: