Question

我构建了一个字符串数组，我正在尝试查询mySQL表。我想找到与我的单词'AND'分隔的项目列表匹配的所有行。我已经尝试了下面的代码，但没有得到任何结果。如何使用implode改进我的代码以执行正确的查询？

感谢您的帮助。

 $conditions = array(
     'Monday',
     'Tuesday',
     'Wednesday'
 );
 $connection = mysqli_connect(DB_SERVER, DB_USER, DB_PASS, DB_NAME);

 if (mysqli_connect_errno())
{
die("Database connection failed: " . mysqli_connect_error() . " (" . mysqli_connect_errno() . ")");
}

 $query = "SELECT * FROM match_tracker ";

 // append the conditions

 $query.= "WHERE " . implode(" AND ", $conditions);
 $result = mysqli_query($connection, $query);

 if ($result)
{
echo "Results positive.  ";
}

 if (!$result)
{
echo "Empty results.";
die("database query failed.");

Answer 1

您需要确保正确引用implode()中的值：

$items = "day = '" . implode("' AND day = '", $conditions) . "'"; // day = 'Monday' AND day = 'Tuesday' AND day = 'Wednesday'
$query.= "WHERE " . $items;

您在上面遗忘的一件事是要测试的列，例如我在day条件中添加的WHERE列。

如果您想要从周一，周二或周三发生事情的表格中获取数据，那么您可以这样做：

$days = "('" . implode("', '", $conditions) . "')"; // ('Monday', 'Tuesday', 'Wednesday')
$query .= "WHERE day IN" . $days;

Answer 2

按照您的代码，您的SQL查询应如下所示："SELECT * FROM match_tracker WHERE Monday AND Tuesday AND Wednesday"。这是你想要的sql字符串吗？如果你希望有更有意义的东西，你必须通过关联数组。下面的内容会更合适：

$conditions = array(
 'Monday' => '1',
 'Tuesday' => '4', 
 'Wednesday' => '3'
 );
 $connection = mysqli_connect(DB_SERVER, DB_USER, DB_PASS, DB_NAME);

if (mysqli_connect_errno())
{
   die("Database connection failed: " . mysqli_connect_error() . " (" . mysqli_connect_errno() . ")");
}

$query = "SELECT * FROM match_tracker WHERE true";

// append the conditions

foreach($conditions AS $key => $value)
{
   $query .= "AND $key = '". mysqli_real_escape_string($connection, $value). "'";
}
$result = mysqli_query($connection, $query);

if ($result)
{
   echo "Results positive.  ";
}

else if (!$result)
{
   echo "Empty results.";
   die("database query failed.");
}

我希望这会有所帮助。

如何使用implode查询数据库？

2 个答案: