在旧的 mysql 代码中,我有一个查询,它运行良好,如下所示:
$questioncontent = (isset($_GET['questioncontent'])) ? $_GET['questioncontent'] : '';
$searchquestion = $questioncontent;
$terms = explode(" ", $searchquestion);
$questionquery = "
SELECT q.QuestionId, q.QuestionContent, o.OptionType, an.Answer, r.ReplyType,
FROM Answer an
INNER JOIN Question q ON q.AnswerId = an.AnswerId
JOIN Reply r ON q.ReplyId = r.ReplyId
JOIN Option_Table o ON q.OptionId = o.OptionId
WHERE ";
foreach ($terms as $each) {
$i++;
if ($i == 1){
$questionquery .= "q.QuestionContent LIKE `%$each%` ";
} else {
$questionquery .= "OR q.QuestionContent LIKE `%$each%` ";
}
}
$questionquery .= "GROUP BY q.QuestionId, q.SessionId ORDER BY "; $i = 0; foreach ($terms as $each) {
$i++;
if ($i != 1)
$questionquery .= "+";
$questionquery .= "IF(q.QuestionContent LIKE `%$each%` ,1,0)";
}
$questionquery .= " DESC ";
但是由于旧的 mysql 正在逐渐消失,人们说要使用 PDO 或 mysqli(由于我目前拥有的 php 版本,不能使用 PDO),我尝试将我的代码更改为 mysqli,但这给我带来了问题。在下面的代码中,我省略了 bind_params 命令,我的问题是如何在下面的查询中绑定参数?它需要能够绑定多个$each
,因为用户能够输入多个术语,并且每个$each
都被归类为术语。
以下是同一查询的当前 mysqli 代码:
$questioncontent = (isset($_GET['questioncontent'])) ? $_GET['questioncontent'] : '';
$searchquestion = $questioncontent;
$terms = explode(" ", $searchquestion);
$questionquery = "
SELECT q.QuestionId, q.QuestionContent, o.OptionType, an.Answer, r.ReplyType,
FROM Answer an
INNER JOIN Question q ON q.AnswerId = an.AnswerId
JOIN Reply r ON q.ReplyId = r.ReplyId
JOIN Option_Table o ON q.OptionId = o.OptionId
WHERE ";
foreach ($terms as $each) {
$i++;
if ($i == 1){
$questionquery .= "q.QuestionContent LIKE ? ";
} else {
$questionquery .= "OR q.QuestionContent LIKE ? ";
}
}
$questionquery .= "GROUP BY q.QuestionId, q.SessionId ORDER BY "; $i = 0; foreach ($terms as $each) {
$i++;
if ($i != 1)
$questionquery .= "+";
$questionquery .= "IF(q.QuestionContent LIKE ? ,1,0)";
}
$questionquery .= " DESC ";
$stmt=$mysqli->prepare($questionquery);
$stmt->execute();
$stmt->bind_result($dbQuestionId,$dbQuestionContent,$dbOptionType,$dbAnswer,$dbReplyType);
$questionnum = $stmt->num_rows();