Question

这是我的connect.php：

$mysql_hostname = "localhost";
$mysql_username = "root";
$mysql_password = "xxxxxxxx";
$mysql_database = "marrybrown_clean";
$bd = mysqli_connect ($mysql_hostname, $mysql_username, $mysql_password) or die ('Could not connect database!');
mysqli_select_db ($mysql_database, $bd) or die (" Could not select database!");

我收到以下错误：

**Warning: mysqli_select_db() expects parameter 1 to be mysqli, string given in C:\xampp\htdocs\marrybrown_clean\connect.php on line 7
Could not select database!**

如何解决？

Answer 1

这一行

click

应该是

.directive('mdChips', function($timeout) {
  return {
    restrict: 'E',
    require: 'mdChips', // Extends the original mdChips directive
    link: function(scope, element, attributes, mdChipsCtrl) {

      var mouseUpActions = [];

      mdChipsCtrl.onInputBlur = function(event) {
        this.inputHasFocus = false;

        mouseUpActions.push((function() {
          var chipBuffer = this.getChipBuffer();
          if (chipBuffer != "") { // REQUIRED, OTHERWISE YOU'D GET A BLANK CHIP
            this.appendChip(chipBuffer);
            this.resetChipBuffer();
          }
        }).bind(this));
      };

      window.addEventListener('click', function(event) {
        while (mouseUpActions.length > 0) {
          var action = mouseUpActions.splice(0, 1)[0];
          $timeout(function() {
            $timeout(action);
          });
        }
      }, false);
    }
  }
})

链接（mysqli_select_db ($mysql_database, $bd)）位于mysqli_select_db ($bd, $mysql_database)个函数中。

Answer 2

mysqli_select_db要求第一个参数为mysqli_connect（）;所以应该如下。

mysqli_select_db ($bd, $mysql_database)

Answer 3

mysqli_selct_db中的第一个参数是连接参数，唯一错误的是你有互换变量。

所以这一行：

mysqli_select_db ($mysql_database, $bd);

需要替换为：

mysqli_select_db ($bd, $mysql_database);

你也可以这样做：

$mysqli = mysqli_connect
    ($mysql_hostname,$mysql_username,$mysql_password,$mysql_database) 
    or die('Could not connect to database!');

Answer 4

建议您在连接时选择数据库：

$mysqli = mysqli_connect
    ($mysql_hostname,$mysql_username,$mysql_password,$mysql_database) 
    or die('Could not connect to database!');

您还可以使用面向对象的样式：

$mysqli = new mysqli
    ($mysql_hostname,$mysql_username,$mysql_password,$mysql_database);

Answer 5

尝试

mysqli_select_db ($bd,$mysql_database)

喜欢http://php.net/manual/fr/mysqli.select-db.php

连接数据库时mysqli有什么问题？

5 个答案: