有人知道为什么图片没有上传吗

Question

正如标题所说，有人知道为什么图片没有上传吗？ 我正在尝试制作一个图片上传页面，但图片没有上传。

这是 HTML 表单：

<form enctype="multipart/form-data" method="POST" action="../php/modifica-profilo.php">
<!-- other inputs -->
<div class="form-group">
    <label>Immagine profilo</label>
    <input type="file" name="propic" class="form-control-file" accept="image/x-png,image/jpeg">
    <small class="form-text text-muted">Solo immagini .png e .jpg - Dimensione massima 4 MB</small>
</div>
<div class="form-group">
    <button class="btn btn-primary btn-block" type="submit" name="dettagliBtn">Salva modifiche</button>
</div>

这是 php 脚本部分“modifica-profilo.php”：

if(!empty($_POST['propic'])){
            $dimensioneFile = $_FILES['propic']['size'];
            $tipoFile = $_FILES['propic']['type'];
            $tmp_name = $_FILES['propic']['tmp_name'];

            $dir = "../img/propic-utenti/";

            $estensione = image_type_to_extension(IMAGETYPE_PNG);
            $estensione = image_type_to_extension(IMAGETYPE_JPEG);

            $propic = md5($uid).$estensione;

            if($dimensioneFile > 4000000){
                echo "Il file è troppo grande";
            }else{
                move_uploaded_file($tmp_name,$dir.$propic);
            }
        }else{
            $prendoPropic = "SELECT propic FROM clienti WHERE id='$uid';";
            $rpp = $conn->query($prendoPropic);
            $p = $rpp->fetch_assoc();

            if($p['propic'] == "p-default.png"){
                $propic = "p-default.png";
            }else{
                $propic = $p['propic'];
            }
        }

        $aggiornodb = "UPDATE clienti SET cognome='$cognome', nome='$nome', email='$email', propic='$propic' WHERE id='$uid';";
        $risultato = $conn->query($aggiornodb);

Answer 1

这是因为，$_POST['propic'] 永远是空的， 这应该是$_FILES['propic']

你最好用这个

if(!empty($_POST['dettagliBtn'])){
//since you only have 1 data on $_POST which is the button. Because you have given it a name attribute.

不是这个

if(!empty($_POST['propic'])){
// this will always get false

还要确保提交按钮在您的表单中。