PHP MySQLi致命成员函数fetch_array()为非对象调用

时间:2014-04-14 14:51:13

标签: php mysql mysqli fetch

是的...这个问题已多次发布。这是一个例子:Fatal error: Call to a member function query()on a non-object。但我查看了很多这些重复的帖子,找不到解决方案

我从这个网站(nine-to-five

中提取了这个(工作)代码

但我修改了我的代码(与SO帖子不同),以包含帖子答案中提到的代码,我仍然收到错误:

// Credentials
  $dbhost = "localhost";
  $dbname = "qmsdb";
  $dbuser = "root";
  $dbpass = "";

  //    Connection
  global $tutorial_db;

  $tutorial_db = new mysqli();
  $tutorial_db->connect($dbhost, $dbuser, $dbpass, $dbname);
  $tutorial_db->set_charset("utf8");

  //    Check Connection
  if ($tutorial_db->connect_errno) {
     printf("Connect failed: %s\n", $tutorial_db->connect_error);
     exit();
  }


  // Get Search
     $search_string = preg_replace("/[^A-Za-z0-9]/", " ", $_POST['query']);
     $search_string = $tutorial_db->real_escape_string($search_string);

  // Check Length More Than One Character
     if (strlen($search_string) >= 1 && $search_string !== ' ') {

  // Build Query
  $query = 'SELECT * FROM compressors WHERE MUNPN LIKE "%'.$search_string.'%" OR name LIKE "%'.$search_string.'%"';

  // Do Search
  $result = mysql_query($query);
  while($results = $result->fetch_array()) {  
    $result_array[] = $results;
}

    .... more code that doesn't apply....

    }

错误是:“对非对象的成员函数fetch_array()的致命调用”,该行指向:

    while($results=$results->fetch_array()) {

我对Php / MySQL很新 - 所以对此的任何帮助都将非常感激。

谢谢!

1 个答案:

答案 0 :(得分:1)

mysql_*()函数 NOT NEVER 是面向对象的:

$tutorial_db = new mysqli();
                        ^----note the "i"


$result = mysql_query($query);
               ^-- note the LACK of an "i"
while($results = $result->fetch_array()) { 
                ^^^^^^^^---- not an object, because mysql_*() functions are NOT objects

您不能在任何其他库中使用在一个数据库库(pdo,mysqli,mysql)中创建的数据库句柄/对象。他们可能都在谈论MySQL,但他们各自的句柄/对象不是互相兼容的。