PHP Array问题 - 无法通过foreach循环使用

Question

谢谢大家，问题已回答！如果有人有兴趣，更新的功能如下，所有其他代码保持不变：

function fetch_questions($page) { 
global $link; 
$proc = mysqli_prepare($link, "SELECT * FROM tquestions_cwh WHERE page = ?"); 
mysqli_stmt_bind_param($proc, "i", $page); 
mysqli_stmt_execute($proc); 


$rowq = array(); 
stmt_bind_assoc($proc, $rowq); 

// loop through all result rows 
// while ($proc->fetch()) { 
    // print_r($rowq); 
//  $rows[]=$rowq; 
// } 

while ($proc->fetch()) 
{ 
    foreach($rowq as $key=>$value) 
    { 
     $row_tmb[ $key ] = $value; 
    } 
    $rows[] = $row_tmb; 
} 

mysqli_stmt_close($proc); 
mysqli_clean_connection($link); 
return($rows); 

}

好吧，

下面是代码：

function fetch_questions($page) { 
    global $link; 
    $proc = mysqli_prepare($link, "SELECT * FROM tquestions_cwh WHERE page = ?"); 
    mysqli_stmt_bind_param($proc, "i", $page); 
    mysqli_stmt_execute($proc); 


    $rows = array(); 
    stmt_bind_assoc($proc, $rowq); 

    // loop through all result rows 
    while ($proc->fetch()) { 
     // print_r($rowq); 
     $rows[]=$rowq; 
    } 

    mysqli_stmt_close($proc); 
    mysqli_clean_connection($link); 
    return($rows); 
} 

我然后将其添加到php变量，如下所示：

$qs = fetch_questions($page); 

我然后依次通过的，就像这样：

foreach($qs as $value){ 
       echo "<tr>".$value['qnum']." is the questions number and the question text is ".$value['qtext'].". The page and q values are ".$value['page']." and ".$value['questions']." respectively.</tr>"; 

输出，但是是这样的：

8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively.8 is the questions number and the question text is I know how what I do fits into my team's objectives. The page and q values are 1 and q8 respectively. 

这不是我想要的东西，以供参考，使用打印功能看起来数组像这样：

Array 
    (
     [0] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [1] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [2] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [3] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [4] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [5] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [6] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

     [7] => Array 
      (
       [questions] => q8 
       [qnum] => 8 
       [qtext] => I know how what I do fits into my team's objectives 
       [page] => 1 
      ) 

    ) 

很明显，它没有循环显示每一行，因为它应该...任何建议？

荷马。

Answer 1

我读了manual，找到这个可以帮助你：

/* 
while ($proc->fetch()) {   
    // print_r($rowq);   
    $rows[]=$rowq;   
} 
*/ 
while ($proc->fetch()) 
{ 
    foreach($rowq as $key=>$value) 
    { 
     $row_tmb[ $key ] = $value; 
    } 
    $row[] = $row_tmb; 
} 

报价：的问题是，返回的$rowq是参考，而不是数据。因此，当您编写$row[] = $rowq时，$row将填充数据集的最后一个元素。

Answer 2

对不起，我不熟悉mysqli的程序风格，所以我不知道这是否是你的问题。但是，在我看来，你已经将$ proc设置为mysqli_prepare的结果，但是according to the manual，该函数返回true或false。然后你使用$ proc作为mysqli_stmt_bind_param（）的第一个参数，但是，according to the manual，这个参数应该是mysqli_stmt_init（）的返回值，我假设它是$ link。事实上，无论你使用$ proc作为参数，你都应该使用$ link。

Answer 3

不知道是否还有更多，但标记是错误的：您错过了打开和关闭<td>。你发布的输出看起来很完整，它只出现在一行中。尝试：

foreach($qs as $value) { 
    echo "<tr><td>".$value['qnum']." is the questions number and the question text is ".$value['qtext'].". The page and q values are ".$value['page']." and ".$value['questions']." respectively.</td></tr>"; 
} 

Answer 4

mysqli_stmt_fetch手册说：

注：请注意，所有列必须由应用程序调用mysqli_stmt_fetch之前的约束（）。

也许为SELECT *查询，你应该使用mysqli_stmt_store_result和mysqli_stmt_result_metadata函数来获取所有列。