Php 从MySQL查询填充多维数组

我正在尝试从MySQL查询创建多维数组

查询：

    $STH = $DBH->query( "SELECT  value, o_ID, oName, date,  
                         DATE_FORMAT(date, '%d %m %Y') as FDate,
                         DATE_FORMAT(tsTime, '%H:%i') as FTime
                         FROM test tst
                         LEFT JOIN object o
                         ON  tst.o_ID =o.oID
                         WHERE DATE(date) = '$date'
                         ORDER BY FDate, FTime, oName ASC");
    $STH->setFetchMode(PDO::FETCH_ASSOC); 

$returnValue = array();
$data = array();

while ( $row = $STH->fetch() ) {

   $returnValue[$row['oName']] = 
       array(
         $data[] = array(
              'time' => $row['FTime'], 'value' => $row['value']
          )
       );
}  

{"objectA":[{"time":"23:55","value":"15"}],"objectB":[{"time":"23:55","value":"15.90"}],..}

{"objectA":[{"time":"01:00","value":"15"},{"time":"02:00","value":"11"},{"time":"03:00,"value":"16"}],"objectB":[{"time":""01:00","value":"12"},{"time":""02:00","value":"25"},{"time":""03:00","value":"5"}],..}

循环：

    $STH = $DBH->query( "SELECT  value, o_ID, oName, date,  
                         DATE_FORMAT(date, '%d %m %Y') as FDate,
                         DATE_FORMAT(tsTime, '%H:%i') as FTime
                         FROM test tst
                         LEFT JOIN object o
                         ON  tst.o_ID =o.oID
                         WHERE DATE(date) = '$date'
                         ORDER BY FDate, FTime, oName ASC");
    $STH->setFetchMode(PDO::FETCH_ASSOC); 

$returnValue = array();
$data = array();

while ( $row = $STH->fetch() ) {

   $returnValue[$row['oName']] = 
       array(
         $data[] = array(
              'time' => $row['FTime'], 'value' => $row['value']
          )
       );
}  

{"objectA":[{"time":"23:55","value":"15"}],"objectB":[{"time":"23:55","value":"15.90"}],..}

{"objectA":[{"time":"01:00","value":"15"},{"time":"02:00","value":"11"},{"time":"03:00,"value":"16"}],"objectB":[{"time":""01:00","value":"12"},{"time":""02:00","value":"25"},{"time":""03:00","value":"5"}],..}

输出：

    $STH = $DBH->query( "SELECT  value, o_ID, oName, date,  
                         DATE_FORMAT(date, '%d %m %Y') as FDate,
                         DATE_FORMAT(tsTime, '%H:%i') as FTime
                         FROM test tst
                         LEFT JOIN object o
                         ON  tst.o_ID =o.oID
                         WHERE DATE(date) = '$date'
                         ORDER BY FDate, FTime, oName ASC");
    $STH->setFetchMode(PDO::FETCH_ASSOC); 

$returnValue = array();
$data = array();

while ( $row = $STH->fetch() ) {

   $returnValue[$row['oName']] = 
       array(
         $data[] = array(
              'time' => $row['FTime'], 'value' => $row['value']
          )
       );
}  

{"objectA":[{"time":"23:55","value":"15"}],"objectB":[{"time":"23:55","value":"15.90"}],..}

{"objectA":[{"time":"01:00","value":"15"},{"time":"02:00","value":"11"},{"time":"03:00,"value":"16"}],"objectB":[{"time":""01:00","value":"12"},{"time":""02:00","value":"25"},{"time":""03:00","value":"5"}],..}

如何将所有值放入$data数组中

所需输出：

    $STH = $DBH->query( "SELECT  value, o_ID, oName, date,  
                         DATE_FORMAT(date, '%d %m %Y') as FDate,
                         DATE_FORMAT(tsTime, '%H:%i') as FTime
                         FROM test tst
                         LEFT JOIN object o
                         ON  tst.o_ID =o.oID
                         WHERE DATE(date) = '$date'
                         ORDER BY FDate, FTime, oName ASC");
    $STH->setFetchMode(PDO::FETCH_ASSOC); 

$returnValue = array();
$data = array();

while ( $row = $STH->fetch() ) {

   $returnValue[$row['oName']] = 
       array(
         $data[] = array(
              'time' => $row['FTime'], 'value' => $row['value']
          )
       );
}  

{"objectA":[{"time":"23:55","value":"15"}],"objectB":[{"time":"23:55","value":"15.90"}],..}

{"objectA":[{"time":"01:00","value":"15"},{"time":"02:00","value":"11"},{"time":"03:00,"value":"16"}],"objectB":[{"time":""01:00","value":"12"},{"time":""02:00","value":"25"},{"time":""03:00","value":"5"}],..}

试试这个：

while ( $row = $STH->fetch() ) {
    $returnValue[] = array(
       'time' => $row['FTime'], 'value' => $row['value']
      );
    }  

试一试：

$returnValue = array();
while ( $row = $STH->fetch() )
{
   if (!$returnValue[$row['oName']])
   {
       $returnValue[$row['oName']] = array();
   }
   $returnValue[$row['oName']][]= array(
          'time' => $row['FTime'], 'value' => $row['value']
      );
}

那会给你你想要的

这里的区别是，如果oName-键不存在，我将创建它，并为其分配一个新的空数组，然后向该数组添加一个新的辅助数组

---

当第N行的

oName

已经有匹配的键时，我不会重新分配该键，但我只是将一个额外的数组推送到该键。

尝试将while循环替换为

while（$row=$STH->fetch（））{$returnValue[$row['oName']=array（'time'=>$row['FTime']，'value'=>$row['value']））}

它将像这样返回它：

[{“time”：“01:00”，“value”：“15”}，{“time”：“02:00”，“value”：“11”}，…]

解析错误：语法错误，在前几行显示
注意：未定义索引：objectA in…，注意：未定义索引：objectB in
但随后就可以了`{“objectA”：[{“time”：“00:00”，“value”：“15.90”}，{“time”：“01:0”，“value”：“15.80”}……`@inTry:只需启动
$returnValue
并为其分配一个数组，如果通知仍然出现，请尝试在if语句中使用
数组键存在
或
空
，而不是
！$returnValue[]