PHP中的SQL查询仅在功能外起作用

Question

我有以下PHP代码段：

function getFacilities($testName, $dbAdapter) {
  $sql1 = "SELECT * FROM facilities_db WHERE facility_name = '$testName'";
  $result1 = $dbAdapter->query($sql1);

  $facility_details = array();
  while ($row = mysqli_fetch_assoc($result1))
  {
    $facility_details[] = $row;
  }
  return $facility_details;
}

$testName = "Abraham Moss Leisure";
$facility_data = getFacilities($testName, $mysqli);

仅出于测试目的，$ testName的值是任意的。 这是答案中的函数，但是我最初的定义的唯一区别是没有$ dbAdapter作为参数。

Answer 1

您需要将$ testName设置为参数，还要设置将用于获得与SGBD的连接的适配器（此处为mysqli）。

function getFacilities($testName, $dbAdapter) {
    $sql1 = "SELECT * FROM facilities_db WHERE facility_name = '$testName'";
    $result1 = $dbAdapter->query($sql1);

    $facility_details = array();
    while ($row = mysqli_fetch_assoc($result1))
    {
      $facility_details[] = $row;
    }
    return $facility_details;
}

我们需要将$testName和$mysqli作为您的dbAdapter传递给该函数。 因此，这就是我们调用函数的方式：

$facility_data = getFacilities($testName, $dbAdapter);

希望这会有所帮助，

Answer 2

测试查询结果：

print_r(mysqli_fetch_assoc($result));

测试$mysqli的功能：

function get($testName, $adapter) { if (!isset($adapter)) echo 'no'; }

使用静态数据库连接：

class GlobalClass { public static $db = null; }

class Connection {
public $connection = null;
public function connect() {
    if ($connection == null)
        // operation
    $this->connection = 'obj';
}}


$db = new Connection();
$db->connect();
GlobalClass::$db = new Connection();
GlobalClass::$db->connect();
GlobalClass::$db->connection->query($sql);

function yourFunction($testName) {
    $sql1 = "SELECT * FROM facilities_db WHERE facility_name = '$testName'";

    $result1 = GlobalClass::$db->connection->query($sql1);

    $facility_details = array();
    while ($row = mysqli_fetch_assoc($result1)) {
      $facility_details[] = $row;
    }
    return $facility_details;
}

Answer 3

    function getFacilities($testName) {
          global $dbAdapter;
        $sql1 = "SELECT * FROM facilities_db WHERE facility_name = '$testName'";
        $result1 = $dbAdapter->query($sql1);

        $facility_details = array();
        while ($row = mysqli_fetch_assoc($result1))
        {
          $facility_details[] = $row;
        }
        return $facility_details;
    }

$testName = "Abraham Moss Leisure";
$facility_data = getFacilities($testName);

将连接变量声明为全局变量，并传递$ testname的值