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PHP，mysqli insert_id不起作用

[英]PHP, mysqli insert_id not working

 原文  2013-01-11 22:42:21  8   5    php

問題描述

我一直在瘋狂嘗試找出為什么insert_id在我的數據庫中返回0的原因。 我上傳圖像，然后上傳圖像所屬的類別以及帶有image_id的簡短描述（應從insert_id中提取）我無法弄清楚為什么圖像不起作用。

上傳圖片功能是： 

function postImageShare($image_name)
{
    global $BEAR;

    if ($stmt = $BEAR->Database->prepare("INSERT INTO images SET account_name = '".$_SESSION['account_name']."', image_name = ?"))
    {
        $stmt->bind_param('s', $image_name);
        $stmt->execute();
        //$stmt->close();   
    }       

    $lastItemID  = $BEAR->Database->insert_id;
    return $lastItemID; 
}

然后，插入description / image_id和類別的函數（稱為hoard）如下： 

function postImageShareInformation($description, $hoard_id)
{
    global $BEAR;

    if ($stmt = $BEAR->Database->prepare("INSERT INTO imagesInformation SET account_name = '".$_SESSION['account_name']."', image_id = '$lastItemID', description = ?, hoard_id = ? "))
    {
        $stmt->bind_param('si', $description, $hoard_id);
        $stmt->execute();
        $stmt->close(); 
    }   

}

當我運行上面的代碼時，除了image_id始終為0之外，數據庫已被有效填充。 當我運行完上面的代碼后，我也會收到關於$ lastIteID的通知。 我嘗試放置 

        $lastItemID  = $BEAR->Database->insert_id;

在第二個“ postImageShareInformation”函數中，插入的結果仍然為0。兩個表都具有自動遞增的id字段，而$ BEAR是我與數據庫的連接。 任何幫助將不勝感激，因為這個問題使我發瘋。

更新 ：

HTML： 

<form action=" " id="share_form" method="post" enctype="multipart/form-data">
       <input type="file" id="share_image" name="share_image" style="display:none"/>
       <div id="upload-image-button" class="uibutton-upload">Choose Image</div>        
</form>

上面是上傳圖像的形式，它是通過下面的j'query和PHP完成的： 

 $(document).ready(function() { 
        $('#share_image').live('change', function(){ 
            $("#preview_share").html('');
            $("#preview_share").html('<div class="loading_bar"><div id="image_bar" class="bar"><span></span></div></div>');

            $("#share_form").ajaxForm({
                target: '#preview_share'
            }).submit();
    });
});

然后通過以下表格上傳圖像描述和收藏： 

<form autocomplete="off" enctype="multipart/form-data" method="post" name="form">
    <input type="text" name="description"/><br/>
    <input type="text" name="hoard_id"/><br/>
    <input type="submit" value="submit"> 
 </form>

這是使用以下功能的php： 

 if(isset($_POST['description']))
{   // Set and Clean Variables
    $BEAR->Template->setData('description', $_POST['description'], TRUE);
    $BEAR->Template->setData('hoard_id', $_POST['hoard_id'], TRUE);
    $BEAR->Webprofile->postImageShareInformation($BEAR->Template->getData('description'), $BEAR->Template->getData('hoard_id'));
}

else if(isset($_FILES['share_image']) )
{
    $valid_formats = array("jpg", "jpeg", "png");

    $name = $_FILES['share_image']['name'];
    $size = $_FILES['share_image']['size'];

    if ($size > 2097152)
    {
        echo '<div class="image_error">Photo Too Large</div>';
    }
    else if(strlen($name))
    {

        list($txt, $ext) = explode(".", $name);

        if(in_array($ext,$valid_formats))
        {

            // Set Image Upload Data
            $BEAR->Template->setData('actual_image_name', $_SESSION['account_name']."-".rand().time().substr(str_replace(" ", "_", $txt), 5).".".$ext);
            $tmp = $_FILES['share_image']['tmp_name'];

            // Move Location
            $location_original = "uploads/test/".$_SESSION['account_name']."/";
            $location_large = "uploads/test/".$_SESSION['account_name']."/large/";
            $location_small = "uploads/test/".$_SESSION['account_name']."/small/";

            if (!file_exists("uploads/test/" . $_SESSION['account_name']))
            {

                mkdir($location_original, 0744);
                mkdir($location_small, 0744);
                mkdir($location_large, 0744);

                move_uploaded_file($tmp, $location_original.$BEAR->Template->getData('actual_image_name'));
                $BEAR->Assets->create_thumb(125, 125, $location_original, $BEAR->Template->getData('actual_image_name'), $location_small);
                $BEAR->Assets->create_thumb(500, 500, $location_original, $BEAR->Template->getData('actual_image_name'), $location_large);

                echo "<img src='uploads/test/".$_SESSION['account_name']."/large/".$BEAR->Template->getData('actual_image_name')."'class='preview'>".$BEAR->Template->getData('actual_image_name');
            }
            else
            {
                // Move Image
                move_uploaded_file($tmp, $location_original.$BEAR->Template->getData('actual_image_name'));
                $BEAR->Assets->create_thumb(125, 125, $location_original, $BEAR->Template->getData('actual_image_name'), $location_small);
                $BEAR->Assets->create_thumb(500, 500, $location_original, $BEAR->Template->getData('actual_image_name'), $location_large);  

                $BEAR->Webprofile->postImageShare($BEAR->Template->getData('actual_image_name'));
                echo "<img src='uploads/test/".$_SESSION['account_name']."/small/".$BEAR->Template->getData('actual_image_name')."' class='preview'>";
            } 
        }
        else 
        {
            echo '<div class="image_error">Invalid File Type</div>';
        }                       
    }                        
    else
    {
        echo '<div class="image_error">Failed</div>';
    }
}

以上所有內容都允許用戶在提交描述和Hoard ID之前預覽上傳的圖像。希望這會有所幫助。

5 個解決方案

解決方案1
 1 已采納  2013-01-12 09:08:39

在我看來，您的函數postImageShareInformation($description, $hoard_id)沒有獲得$lastItemID變量。 因此，嘗試像下面$lastItemID在函數本身中傳遞$lastItemID的值。 

function postImageShareInformation($description, $hoard_id, $lastItemID)
{
    global $BEAR;

    if ($stmt = $BEAR->Database->prepare("INSERT INTO imagesInformation SET account_name = '".$_SESSION['account_name']."', image_id = '".$lastItemID."', description = ?, hoard_id = ? "))
    {
        $stmt->bind_param('si', $description, $hoard_id);
        $stmt->execute();
        $stmt->close(); 
    }   

}

對更新的問題

您在調用postImageShareInformation()函數之前先調用了postImageShare()函數。 因此，它將永遠不會獲得$lastItemID 。 假設您使用新的修改函數，那么我已經修改了您的代碼。 但這仍然可以給您一個想法。 

if(isset($_FILES['share_image']) )
{
    $valid_formats = array("jpg", "jpeg", "png");

    $name = $_FILES['share_image']['name'];
    $size = $_FILES['share_image']['size'];

    if ($size > 2097152)
    {
        echo '<div class="image_error">Photo Too Large</div>';
    }
    else if(strlen($name))
    {

        list($txt, $ext) = explode(".", $name);

        if(in_array($ext,$valid_formats))
        {

            // Set Image Upload Data
            $BEAR->Template->setData('actual_image_name', $_SESSION['account_name']."-".rand().time().substr(str_replace(" ", "_", $txt), 5).".".$ext);
            $tmp = $_FILES['share_image']['tmp_name'];

            // Move Location
            $location_original = "uploads/test/".$_SESSION['account_name']."/";
            $location_large = "uploads/test/".$_SESSION['account_name']."/large/";
            $location_small = "uploads/test/".$_SESSION['account_name']."/small/";

            if (!file_exists("uploads/test/" . $_SESSION['account_name']))
            {

                mkdir($location_original, 0744);
                mkdir($location_small, 0744);
                mkdir($location_large, 0744);

                move_uploaded_file($tmp, $location_original.$BEAR->Template->getData('actual_image_name'));
                $BEAR->Assets->create_thumb(125, 125, $location_original, $BEAR->Template->getData('actual_image_name'), $location_small);
                $BEAR->Assets->create_thumb(500, 500, $location_original, $BEAR->Template->getData('actual_image_name'), $location_large);

                echo "<img src='uploads/test/".$_SESSION['account_name']."/large/".$BEAR->Template->getData('actual_image_name')."'class='preview'>".$BEAR->Template->getData('actual_image_name');
            }
            else
            {
                // Move Image
                move_uploaded_file($tmp, $location_original.$BEAR->Template->getData('actual_image_name'));
                $BEAR->Assets->create_thumb(125, 125, $location_original, $BEAR->Template->getData('actual_image_name'), $location_small);
                $BEAR->Assets->create_thumb(500, 500, $location_original, $BEAR->Template->getData('actual_image_name'), $location_large);  

                // This will return $lastItemID which we will pass now to postImageShareInformation() function in the block below.
                $lastItemID = $BEAR->Webprofile->postImageShare($BEAR->Template->getData('actual_image_name'));

                if(isset($_POST['description']))
                {   // Set and Clean Variables
                    $BEAR->Template->setData('description', $_POST['description'], TRUE);
                    $BEAR->Template->setData('hoard_id', $_POST['hoard_id'], TRUE);
                    //You were calling this function before ...
                    $BEAR->Webprofile->postImageShareInformation($BEAR->Template->getData('description'), $BEAR->Template->getData('hoard_id'),$lastItemID);
                }
                echo "<img src='uploads/test/".$_SESSION['account_name']."/small/".$BEAR->Template->getData('actual_image_name')."' class='preview'>";
            } 
        }
        else 
        {
            echo '<div class="image_error">Invalid File Type</div>';
        }                       
    }                        
    else
    {
        echo '<div class="image_error">Failed</div>';
    }
}

這應該工作...

希望能幫助到你。

解決方案2
 0  2013-01-11 22:49:05

我假設$ Bear對象不是直接的mysqli連接。它是由您創建的類？

如果你有 

$mysqli = new MySQLi($host, $user, $password, $db_name);

然后在您運行查詢后 

$mysqli->query("INSERT INTO test VALUES ('test')");

您可以通過以下方式獲取最后插入的ID 

$mysqli->insert_id

解決方案3
 0  2013-01-11 22:53:05

MySQL在last_insert_id()函數中提供了此功能。

解決方案4
 0  2013-01-12 10:08:17

我想說這是因為您的表格的ID列沒有AUTO_INCREMENT屬性

解決方案5
 0  2013-01-12 13:16:28

現在我知道這里發生了什么。 所以我們有這兩個功能： 

function postImageShare($image_name)
{
    global $BEAR;

    if ($stmt = $BEAR->Database->prepare("INSERT INTO images SET account_name = '".$_SESSION['account_name']."', image_name = ?"))
    {
        $stmt->bind_param('s', $image_name);
        $stmt->execute();
        //$stmt->close();   
    }       

    $lastItemID  = $BEAR->Database->insert_id;
    return $lastItemID; 
}

和 

// Note that I've added a new parameter to this function and also
// I've modified your prepare statement
function postImageShareInformation($description, $hoard_id, $lastItemID)
{
    global $BEAR;

    if ($stmt = $BEAR->Database->prepare("INSERT INTO imagesInformation SET account_name = '".$_SESSION['account_name']."', image_id = ?, description = ?, hoard_id = ? "))
    {
        $stmt->bind_param('si', $lastItemID, $description, $hoard_id);
        $stmt->execute();
        $stmt->close(); 
    }   

}

現在，當我們調用第一個時，我們必須將返回的id分配給一個變量： 

$lastItemID = postImageShare("myImageName");

當我們調用第二個函數時，可以將此變量分配給最后一個參數： 

postImageShareInformation("My description", 13, $lastItemID);

現在應該就好了！

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