我在實習(xí)中做的練習(xí)涉及一個上傳頁面，一個表格頁面，它將輸出數(shù)據(jù)庫表的記錄和一個數(shù)據(jù)庫表。問題是，經(jīng)過巨大的努力使所有連接良好，我遇到了一些麻煩，因為 index.php 頁面應(yīng)該發(fā)送信息并且正在發(fā)送數(shù)組并保存數(shù)組而不是文件。下面是 index.php 頁面的 PHP 代碼： <?phpif (!isset($_POST['Enviar'])): // This if will search if the $_POST variable already has anything or not.$allowed = array('txt'); //This array contains the file types which are allowed.$uploadtime = time();$uploadfile = $_FILES['file_to_upload'];include 'db_connection.php';$sql="select * from uploads";$result = $conn->query($sql);$target_dir = "uploads/"; //variable that will save the name of the folder or way where the file will be saved.$target_file = $target_dir . basename($_FILES['file_to_upload']['name']); //NOTICE undefined index: file_to_upload... because it doesn't have any value safe there yet.$goon = 1; //This variable is used to check if there is any error messages or if the program can go on.$ext = pathinfo( $_FILES["file_to_upload"]["name"], PATHINFO_EXTENSION); // This will use the OS to get the file extension.if(!in_array($ext,$allowed) ) {echo 'Erro: Ficheiro n?o permitido. <br> Por favor, verifique se o formato do ficheiro é txt.';$goon = 0;} 第二段代碼中的字段名稱是數(shù)據(jù)庫中的名稱。誰能告訴我在 index.php 頁面中收到此錯誤消息有什么問題：注意：第 66 行 C:\xampp\htdocs\16082019\index.php 中的數(shù)組到字符串轉(zhuǎn)換
2 回答
撒科打諢
TA貢獻1934條經(jīng)驗 獲得超2個贊
1st：謝謝你試圖幫助我xD。
第二：我已經(jīng)有了一個適合我的練習(xí)的解決方案：
$uploadfile = $_FILES['file_to_upload'];
$uploadfile2 = $uploadfile['name'];
然后用舊線代替：
VALUES('".$_POST['file_name']."','$uploadfile2','$ext','$uploadtime')";
ABOUTYOU
TA貢獻1812條經(jīng)驗 獲得超5個贊
“注意：數(shù)組到字符串的轉(zhuǎn)換”表示您正在嘗試將數(shù)組用作字符串。這是因為您將數(shù)組$_POST['file_name']與您的 INPUT 查詢字符串連接起來。您可以使用implode()函數(shù)將數(shù)組轉(zhuǎn)換為字符串：
$values = implode(',', $_POST['file_name']);
$sql = "INSERT INTO uploads (name,file_name,file_extension,uploaded_time)
VALUES('" . $values . "','$uploadfile','$ext','$uploadtime')";
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