未定义的索引-> PHP 上传不起作用

Question

PHP 上传：

注意：未定义索引：文件在

在线：$count = count($_FILES['file']['name']);

运行我发现的几乎所有出现此错误的代码...仍然没有任何结果

PHP 代码：

<?php
$count = 0;
if(isset($_POST['uploadFinish']))  { 
    $bcode = $_POST['code'];
    $newpath = "upload/".$bcode."/";
    if (!file_exists($newpath)) {
        mkdir($newpath, 0755, true);
    }
    $count = count($_FILES['file']['name']);
    if($count < 1) { 
        $message = "At least 1 file required"; $count='';
    } else {
        move_uploaded_file($_FILES['file']['tmp_name'], $newpath.'/File-'.$bcode);
    }
}
?>

HTML/JS：

<button class="btn btn-primary btntrg123" id="uploadBtn" style="background: #008489; border-color: #008489">Upload file</button> 
<form style="display: none!important;" id="uploadConf" method="post" enctype="multipart/form-data">
    <div style='height: 0px;width:0px; overflow:hidden;'>
        <input type="file" id="file" name="file[]" multiple="multiple" onclick="getFile()" class="btn btn-primary inptri123">
    </div>
    <input type="hidden" name="code" value="<?php echo $code; ?>">
    <input name="uploadFinish" value="1" type="hidden"> 
</form>
<script type="text/javascript">
$(".btntrg123").click(function(event){ 
    event.preventDefault();
    $(".inptri123").trigger('click');
}); 
function getFile(){ 
    document.getElementById("file").onchange = function () {
        var file = this.value;
        console.log(file);
        var form = document.getElementById('uploadConf');
        form.submit();
    };
}
</script>

两个代码都是相同的 php 文件。从其他文件运行 php，结果相同。

Console.log 给了我文件，但它没有上传到服务器。 文件夹已创建。

Answer 1

多文件上传时可以使用

$name=$_FILES['file']['name'][$index];

$tmp=$_FILES['file']['tmp_name'][$index];

您的代码应如下所示

$total = count($_FILES['file']['name']);
for( $i=0 ; $i < $total ; $i++ ) {


  $tmp= $_FILES['file']['tmp_name'][$i];

  if (!(empty($tmp )){

    $path= "/upload/" . $_FILES['file']['name'][$i];


    if(move_uploaded_file($tmp, $path)) {

         echo $_FILES['file']['name'][$i]. ' uploaded';
       }
  }
}

Answer 2

看来您只是漏掉了一个表单action。

应该是这样的：

<form style="display: none!important;" id="uploadConf" method="post" enctype="multipart/form-data" action="/your/api/call">

或者，您可以使用javascript 为表单附加一个事件：

function processForm(e) {
    if (e.preventDefault) e.preventDefault();

    /* do what you want with the form */

    // You must return false to prevent the default form behavior
    return false;
}

var form = document.getElementById('uploadConf');
if (form.attachEvent) {
    form.attachEvent("submit", processForm);
} else {
    form.addEventListener("submit", processForm);
}

Answer 3

我想你想检查上传文件的数量。

HTML

<button class="btn btn-primary btntrg123" id="uploadBtn" style="background: #008489; border-color: #008489">Upload file</button> 
<form action="upload.php" style="display: none!important;" id="uploadConf" method="post" enctype="multipart/form-data">
    <div style='height: 0px;width:0px; overflow:hidden;'>
        <input type="file" id="file" name="file[]" multiple="multiple" onclick="getFile()" class="btn btn-primary inptri123">
    </div>
    <input type="hidden" name="code" value="0">
    <input name="uploadFinish" value="1" type="hidden"> 
</form>
<script type="text/javascript">
$(".btntrg123").click(function(event){ 
    event.preventDefault();
    $(".inptri123").trigger('click');
}); 
function getFile(){ 
    document.getElementById("file").onchange = function () {
        var file = this.value;
        console.log(file);
        var form = document.getElementById('uploadConf');
        form.submit();
    };
}
</script>

试试这个

    <?php
$count = 0;
if(isset($_POST['uploadFinish']))  { 
    $bcode = $_POST['code'];
    $newpath = "upload/".$bcode."/";
    echo $newpath;
    if (!file_exists($newpath)) {
        mkdir($newpath, 0755, true);
    }
    $count = count($_FILES['file']['name']);
    if($count < 1) { 
        $message = "At least 1 file required"; $count='';
    } else {
        $total = count($_FILES['file']['name']);
        for( $i=0 ; $i < $total ; $i++ ) {
                move_uploaded_file($_FILES['file']['tmp_name'][$i], $newpath.'/File-'.$bcode.$_FILES['file']['name'][$i]);
        }
    }
}
?>

1. 向表单添加了动作属性。

action="upload.php"

1. 对处理上传的 PHP 代码稍作更改。