爲什麼只取得1個數組而不是多個數組？

Question

我是一個完全新手在編程PHP我想使下面的代碼返回許多數組（閃存as3），但是我只收到一個數組。任何人都可以請找出我的錯誤是什麼？謝謝。

$data_array = ""; 
$i = 0; 
//if(isset($_POST['myrequest']) && $_POST['myrequest'] == "get_characters") 
//{ 
$sql = mysqli_query($conn, "SELECT * FROM ns_users ORDER BY Char_id"); 
while($row = mysqli_fetch_array($sql)) 
{ 
    $i++; 
    $fb_name = $row["Username"]; 
    $fb_id = $row["Fb_id"]; 
    $fb_at = $row["Access_token"]; 
    $fb_sig = $row["Fb_sig"]; 
    $char_id = $row["Char_id"]; 
    if($i == 1) 
    { 
     $data_array .= "$fb_name|$fb_id|$fb_at|$fb_sig|$char_id"; 
    } 
    else 
    { 
     $data_array .= "(||)$fb_name|$fb_id|$fb_at|$fb_sig|$char_id"; 
    } 
    echo "returnStr=$data_array"; 
    exit(); 
} 

Answer 1

當你寫你的出口洞察你的循環停止執行程序，你會得到只有一個記錄。您應該設置回顯並在while循環後退出。

$data_array = ""; 
$i = 0; 

$sql = mysqli_query($conn, "SELECT * FROM ns_users ORDER BY Char_id"); 
while($row = mysqli_fetch_array($sql)) { 
    $i++; 
    $fb_name = $row["Username"]; 
    $fb_id = $row["Fb_id"]; 
    $fb_at = $row["Access_token"]; 
    $fb_sig = $row["Fb_sig"]; 
    $char_id = $row["Char_id"]; 

    if($i == 1) { 
     $data_array .= "$fb_name|$fb_id|$fb_at|$fb_sig|$char_id"; 
    } else { 
     $data_array .= "(||)$fb_name|$fb_id|$fb_at|$fb_sig|$char_id"; 
    }  
} 
echo "returnStr=$data_array"; 
exit(); 

Answer 2

的這兩個最後一行的應該是你的循環之外：

$data_array = ""; 
$i = 0; 
//if(isset($_POST['myrequest']) && $_POST['myrequest'] == "get_characters") 
//{ 
$sql = mysqli_query($conn, "SELECT * FROM ns_users ORDER BY Char_id"); 
while($row = mysqli_fetch_array($sql)) 
{ 
    $i++; 
    $fb_name = $row["Username"]; 
    $fb_id = $row["Fb_id"]; 
    $fb_at = $row["Access_token"]; 
    $fb_sig = $row["Fb_sig"]; 
    $char_id = $row["Char_id"]; 
    if($i == 1) 
    { 
     $data_array .= "$fb_name|$fb_id|$fb_at|$fb_sig|$char_id"; 
    } 
    else 
    { 
     $data_array .= "(||)$fb_name|$fb_id|$fb_at|$fb_sig|$char_id"; 
    } 



    } 
echo "returnStr=$data_array"; 
     exit(); 

Answer 3

如果你會說出您在SELECT想要的列那麼它的簡單得多。確保在使用MYSQLI_ASSOC抓取：

$sql = mysqli_query($conn, "SELECT Username, Fb_id, Access_token, Fb_sig, Char_id FROM ns_users ORDER BY Char_id"); 

while($row = mysqli_fetch_array($sql, MYSQLI_ASSOC)) 
{ 
    $data_array[] = implode('|', $row); 
} 
echo "returnStr=" . implode('(||)', $data_array); 
exit();