Question

我正在编写一个脚本来循环用户点击的复选框，具体取决于单击哪些复选框将导致“动态”查询。我正在尝试使用数组构建一个where语句，以便在pdo中执行。

我遇到的问题是在foreach循环中我试图使用

=

连接字符串以构建我的查询。但是，当用户点击同一组复选框时，如

'why_and'

只会创建一个$ where，所以当我用var_dump打印出我的查询时，我得到了这个：

SELECT student.anum, 
       student.first, 
       student.last, 
       student.email, 
       session.aidyear, 
       reasons.reason, 
       COUNT(session.anum) as Total, 
       MIN(DATE_FORMAT(session.signintime, '%b %d, %Y - %l:%i %p')) as 'First',      
       MAX(DATE_FORMAT(session.signintime, '%b %d, %Y - %l:%i %p')) as 'Last' 
FROM  
      student INNER JOIN session 
           ON session.anum = student.anum 
      INNER JOIN session_status 
           ON session_status.status = session.status 
      INNER JOIN reasons 
           ON reason_id = session.why 
WHERE 1 AND why = :reason 
GROUP BY session.anum

然后我var_dump占位符数组并得到它：

[ “：原因”] =＆GT; string（9）“4,5,6”}

注意我在：reason数组中有三个值，在查询中只有1：reason。有什么我想念的吗？

这是我的思考过程的一个例子（请看一下评论）：

   $placeholder = array();
    $where = "";

if($and !== "") // This is the "super array" if you will 
{
    if(array_key_exists('why_and', $and)) // Now I check for each specific thing a user can search for in the array / database 
    {
       foreach($and as $key => $value) // Take the $value of the array index why_and
       {
           $where .= " AND why = :reason "; // Create a where variable with a named placer holder for each value that exists in the array 
           $placeholder[':reason'] .= rtrim($value, ' ,'); // Then add to the $placeholder array so I can I add it to the PDO execute as an array
       }
    }
    if(array_key_exists('status_and', $and))
    {
       foreach($and as $key => $value)
       {
           $where .= " AND status = :status ";
           $placeholder[':status'] .= rtrim($value, ' ,');
       }
    }
}
$finSQL = $sql . ' WHERE 1 ' . $where; // COncate the final results
$dynamic = $this-> db-> conn_id-> prepare($finSQL); // prepare
$dynamic-> execute($placeholder); // Use the placeholder array and pass that to the execute as a [key => value pair as shown in the manual example number 2][1]

编辑1 @Your Common Sense

只是为了清理这个工作，但只针对每个复选框类别中的一个值，why_and，status_and但是如果我尝试从同一类别中执行更多一个值，那么它就不起作用。

Php foreach循环连接

0 个答案: