調用函數時php unidentified索引

Question

嗨，我正在調用一個函數將圖像上傳到MySQL數據庫，但它一直在說未識別的索引圖像

我正在使用此按鈕上傳圖像

<input type="file" name="image" size="25" />
<input type ="submit" name = "Register_Btn" value ="Register">

這稱之為

if(isset($_POST['Register_Btn'])){
    uploadImage($link);
    register($link);
}

然后在pictureupload.php我有這個功能

<?php
function UploadImage($link){
    if ($_FILES['image']['error'] == UPLOAD_ERR_OK){
    $image = addslashes(file_get_contents($_FILES['image']['tmp_name'])); //SQL Injection defence!
    $image_name = addslashes($_FILES['image']['name']);
    $sql = "INSERT INTO `authentication` ( `image_name`,`image`) VALUES ('{$image_name}','{$image}')";
    mysqli_query($link,$sql);
    }else{
        echo'No File Chosen';
    }   
}

？>

每次使用['image']時，它都會返回未定義索引：圖像錯誤，也會返回圖片上載的第4行，它也說file_get_contents（）：文件名不能為空如何確保它正在接收上傳的圖像數據？

Answer 1

嘗試檢查您的圖片是否真的上傳了

<?php
function UploadImage($link){
if(isset($_FILES['image']) &&!empty($_FILES['image'])){// check file is uploaded or not
    if ($_FILES['image']['error'] == UPLOAD_ERR_OK){
    $image = addslashes(file_get_contents($_FILES['image']['tmp_name'])); //SQL Injection defence!
    $image_name = addslashes($_FILES['image']['name']);
    $sql = "INSERT INTO `authentication` ( `image_name`,`image`) VALUES ('{$image_name}','{$image}')";
    mysqli_query($link,$sql);
    }
}else{
        echo'No File Chosen';
    }   
}

Answer 2

AHHA

忘了包括

enctype="multipart/form-data"