使用 foreach 循环将值插入数据库

Question

I get values in array for one parameter which is width.

HTML file

<div class="col-sm-2"><input type="number" name="width[]" class="form-control"></div> 
<div class="col-sm-2"><input type="number" name="width[]" class="form-control"></div> 
<div class="col-sm-2"><input type="number" name="width[]" class="form-control"></div>  

After I submit values I get only one record in db for width, other variables are all the same except for width which is different.

this is php code

 if (isset($_POST['submit'])) {

    $width  = $_POST['width']; 
    $quantity =   $_POST['quantity'];
    $length =  $_POST['length']; 
    $productID =  $_POST['productID'];

    $date = date("Y-m-d H:i");

    foreach ($width as $value) { 

        $stmt=$conn->prepare("INSERT INTO testDB (width, quantity, length, productID)                 
        VALUES (:witdh, :quantity, :length, :productID) "); 

        $stmt->bindParam(':witdh',$value);
        $stmt->bindParam(':quantity',$quantity);
        $stmt->bindParam(':length',$length);
        $stmt->bindParam(':productID',$productID); 

        if($stmt->execute()){
            echo "success";
            exit();
        } 
        else{
            print_r($stmt->errorInfo()); 
        }  
    }   
}

Answer 1

When you do

    if($stmt->execute()){
        echo "success";
        exit();
    } 

This will execute the prepared statement and if it succeeds (even in the first time around the loop) it will exit the code!

You should also prepare the statement before the loop, so use...

$stmt=$conn->prepare("INSERT INTO testDB (witdh, quantity, length, productID)                 
    VALUES (:witdh, :quantity, :length, :productID) "); 
$stmt->bindParam(':witdh',$value);
$stmt->bindParam(':quantity',$quantity);
$stmt->bindParam(':length',$length);
$stmt->bindParam(':productID',$productID); 
foreach ($width as $value) { 

    if($stmt->execute()){
        echo "success";
    } 
    else{
        print_r($stmt->errorInfo()); 
    }  
}   

You can set a flag to say if anything fails, how you handle this is up to you.

Answer 2

You have to remove space from name input element.

<div class="col-sm-2"><input type="number" name="width[]" class="form-control"></div> 
<div class="col-sm-2"><input type="number" name="width[]" class="form-control"></div> 
<div class="col-sm-2"><input type="number" name="width[]" class="form-control"></div>  

If you check, I removed space from the name after width.

If will give proper output in print_r($_POST['width']);

EDIT: Please remove exit(); as it is stopping the loop after the first insert.