使用for循環制作多個mysqli查詢

Question

我試圖通過循環訪問數組的值 - （稱爲列）來進行一系列mysqli查詢 - 但沒有任何內容正在返回。

for ($i = 0; $i < sizeof($column); $i++) 

{ 
    $mutualInterests = mysqli_query ($conn, "SELECT USER_1 FROM INTERESTS WHERE answer = " . $column[$i]); 

    while ($row = mysqli_fetch_array ($mutualInterests)) 

    { 
     echo " $row[USER_1]"; 

    } 


} 

Answer 1

只需用下面的代碼替換你給出的代碼，看看導致..........

$query='SELECT USER_1 FROM INTERESTS WHERE answer ="'.$column[0].'"'; 

for ($i = 1; $i < sizeof($column); $i++) 

{ 
$query.=' OR answer ="'.$column[$i].'"'; 

} 

$mutualInterests = mysqli_query ($conn,$query); 

while ($row = mysqli_fetch_array ($mutualInterests)) 

{ 
    echo " $row[USER_1]"; 

} 

Answer 2

替換此：

while ($row = mysqli_fetch_array ($mutualInterests)) 

{ 
    echo " $row[USER_1]"; 

} 

與此：

$count = 0; 
while ($row = mysqli_fetch_array ($mutualInterests)) 
{ 
    echo $row[$count]."<br>"; 
    $count++; 

} 

讓我知道，如果現在的工作！ :)