Question

解码前的部分JSON字符串：,"avail":["Wed-2","Wed-3"]

已解码：$data = json_decode($return, true); 存储在变量中：$avail = $data['avail'];

//数组声明

$days = array();
$cols = array();

$avail:

以上的格式

     if($avail != ""){
        foreach($avail as $k=>$v)
        {
            echo $v;

            $array = explode('-', $v);
            $day =$array[0]; // Wed
            $column =  $array[1]; // 2

            if($column == 1)
            {
            $col = "morning";

            }
            if($column == 2)
            {
                $col = "afternoon";
            }
            if($column == 3)
            {
                $col = "evening";
            }
             echo $col ."=>". $day;

            array_push($cols,$col);
            array_push($days,$day);
        }
        }

//现在使用数组（$ days）匹配列＆＃39;上午＆＃39;在帖子表中。

echo $sql=" SELECT * , (3956 * 2 * ASIN(SQRT( POWER(SIN(('$lat' - lat) *  pi()/180 / 2), 2) +COS('$lat' * pi()/180) * COS(lat * pi()/180) * POWER(SIN(('$lon' - lon) * pi()/180 / 2), 2) ))) as distance  
from posts,subjects WHERE posts.afternoon IN (" . implode(", ",$days) . ") AND posts.catID = '$catid' AND posts.subname LIKE '%$subject%' AND posts.subid = subjects.subid AND posts.catID = subjects.catid  AND posts.pricing <= '$rate'  having  distance <= '$distance' order by distance ";
echo"<br/>";
        $stmt =connection::$pdo->prepare($sql);
        $stmt->execute();
$place=array();
while ($row = $stmt->fetch(PDO::FETCH_ASSOC)) { 
               $place[] = $row;
               }

var_dump($place);

但它返回了这个错误：

致命错误：未捕获的异常＆＃39; PDOException＆＃39;与消息＆＃39; SQLSTATE [42S22]：未找到列：1054未知列＆＃39; Wed＆＃39;在＆＃39; where where＆＃39;＆＃39;在第128行的C：\ wamp \ www \ fetch_tutor.php中（！） PDOException：SQLSTATE [42S22]：找不到列：1054未知列＆＃39;星期三＆＃39;在＆＃39; where子句＆＃39;在第128行的C：\ wamp \ www \ fetch_tutor.php

基于此，我理解提供的数组（$ day）被视为字段名称。事实上，这是在早上检查的数组中的价值＆＃39;邮政表中的字段。

我该怎么做呢。我已经浪费了差不多一天的时间了！

Answer 1

应该是

WHERE posts.afternoon IN ('" . implode("',' ",$days) . "')

获得类似WHERE posts.afternoon IN ('Mon','Wed','Sun')的内容。

如何在列的where子句中使用implode＆＃39;值

1 个答案: