如何在while循環中獲取某些數據不要重新生成

Question

我試着將數據的名字和姓氏從循環中移出，但沒有顯示任何數據。我想知道是否有可能只重複產品，價格，數量而不是名字和姓氏？

<?php 
include ('dbconnect.php'); 
$sql='SELECT * FROM `user_info` ,`customer_order` WHERE user_info.user_id=customer_order.uid'; 

     $run_query=mysqli_query($conn,$sql); 


    if(! $run_query) { 
     die('Could not get data: ' . mysqli_error()); 
    } 

    while($row = mysqli_fetch_array($run_query, MYSQLI_ASSOC)) { 
     echo "name:{$row['first_name']} ". 
      "Last:{$row['last_name']} <br> ". 
      "Product:{$row['p_name']} <br> ". 
      "Price:{$row['p_price']} <br> " . 
      "Quanity:{$row['p_qty']} <br> "; 

     } 

Answer 1

爲了簡化上面顯示的代碼，因爲SQL語句比較快速執行，我建議打破你的聲明兩個：首先獲取名/姓，然後運行一個循環，將獲得您需要的單元格列表。

<?php 
include ('dbconnect.php'); 
// Fetch user info 
$sql='SELECT * FROM `user_info` WHERE user_info.user_id=customer_order.uid'; 
$run_query=mysqli_query($conn,$sql); 

if(! $run_query) { 
    die('Could not get data: ' . mysqli_error()); 
} 
$row = mysqli_fetch_array($run_query, MYSQLI_ASSOC); 
echo "Customer: name:{$row['first_name']} ". 
    "Last:{$row['last_name']} <br>" ; 

// Fetch every orders needed 
$sql='SELECT `p_name`, `p_price`, `p_qty` FROM `user_info`, `customer_order` WHERE `user_info.user_id=customer_order.uid'; 
$run_query=mysqli_query($conn,$sql); 
if(! $run_query) { 
    die('Could not get data: ' . mysqli_error()); 
} 

while($row = mysqli_fetch_array($run_query, MYSQLI_ASSOC)) 
    echo "Product:{$row['p_name']} <br> ". 
     "Price:{$row['p_price']} <br> " . 
     "Quantity:{$row['p_qty']} <br> "; 
} 

Answer 2

試試這個有，如果在循環語句來檢查，如果你正在顯示的名稱相同或不：

<?php 
include ('dbconnect.php'); 
$sql='SELECT * FROM `user_info` ,`customer_order` WHERE user_info.user_id=customer_order.uid'; 

     $run_query=mysqli_query($conn,$sql); 


    if(! $run_query) { 
     die('Could not get data: ' . mysqli_error()); 
    } 

    $first_name_saved = ""; 
    $last_name_saved = ""; 
    while($row = mysqli_fetch_array($run_query, MYSQLI_ASSOC)) { 
     if ($first_name_saved != row["first_name"] && $last_name_saved != row["first_name"]){ 
     echo "name:{$row['first_name']} ". 
      "Last:{$row['last_name']} <br> "; 
     } 
     echo "Product:{$row['p_name']} <br> ". 
      "Price:{$row['p_price']} <br> " . 
      "Quanity:{$row['p_qty']} <br> "; 

      $first_name_saved = $row['first_name']; 
      $last_name_saved = $row['last_name']; 


     }