如何在php中上传图片？

Question

我希望用户在表单上选择一张图片，并通过为我指定的文件指定一个新名称将这张图片的文件路径保存在数据库中，但是当我执行该操作时，if ($ _ FILES) 命令在我的代码块中不起作用，并且图片不会通过使用原始名称注册来复制到数据库中。我在哪里犯错？你能帮帮我吗？

<?php 
    if(isset($_POST['submit'])){

        if($_FILES){
            $maxBoyut       = 700000;
            $dosyaUzantisi  = substr($_FILES["p_img"]["name"],-4,4);
            $dosyaAdi       = rand(1,99999).$dosyaUzantisi;
            $dosyaYolu      = public_url("/uploads/product/".$dosyaAdi);
            
            
            if($_FILES["p_img"]["size"]>$maxBoyut){
                  
                echo "<h2>dosya boyutu 700kb'dan yuksek olamaz...</h2>";
                  
            }else {
                $dosya = $_FILES["p_img"]["type"];
                  
                if($dosya == "image/jpeg" || $dosya == "image/png"){
                  
                  
                    if(is_uploaded_file($_FILES["p_img"]["tmp_name"])){
                      
                      
                      $tasi = move_uploaded_file($_FILES["p_img"]["tmp_name"],$dosyaYolu);
                      
                      $resimTuru = $_FILES["p_img"]["type"];
                      $resimSize = $_FILES["p_img"]["size"];  
                    }    
                }  
            }
        }

        $p_name = isset($_POST['p_name']) ? $_POST['p_name'] : null;
        $p_img = isset($_POST['p_img']) ? $_POST['p_img'] : null;
        $p_barcode = isset($_POST['p_barcode']) ? $_POST['p_barcode'] : null;
        $p_price = isset($_POST['p_price']) ? $_POST['p_price'] : null;
        $p_stock = isset($_POST['p_stock']) ? $_POST['p_stock'] : null;

        $query = $db->prepare('INSERT INTO product SET
            p_name = ?,
            p_img = ?,
            p_barcode = ?,
            p_price = ?,
            p_stock = ?
        ');

        $result = $query->execute([
            $p_name, $p_img, $p_barcode, $p_price, $p_stock
        ]);

        if($result) {
            echo 'Ürün başarıyla eklendi.';
        } else {
            echo 'Ürün eklenemedi.';
        }
    }

?>

<div class="product-list w-1/2">
    <div class="product-list-area">
        <form action="" method="post" ectype="multipart/form-data">
            <div class="input-group flex flex-wrap">
                <div class="input-element w-full">
                    <label class="block" for="task-name">Ürün Görseli Ekle</label>
                    <div class="file-input w-full">
                        <label class="block">
                            <input type="file" id="file" name="p_img">
                            <div class="file-input-box flex flex-col items-center justify-center">
                                <svg viewBox="0 0 24 24" stroke="currentColor" stroke-width="1" fill="none" stroke-linecap="round" stroke-linejoin="round">
                                    <rect x="3" y="3" width="18" height="18" rx="2" ry="2"></rect>
                                    <circle cx="8.5" cy="8.5" r="1.5"></circle>
                                    <polyline points="21 15 16 10 5 21"></polyline>
                                </svg>
                                <span class="block"><strong>Dosya ve Görsel yüklemek için </strong>tıklayın veya sürükleyin</span>
                                <p>DOC, XLS, PNG, JPG maks. 10MB</p>
                            </div>
                        </label>
                    </div>
                </div>
                <div class="input-element w-1/2">
                    <label class="block" for="p_name">Ürün Adı</label>
                    <input type="text" name="p_name" placeholder="">
                </div>
                <div class="input-element w-1/2">
                    <label class="block" for="p_barcode">Ürün Barkod</label>
                    <input type="text" name="p_barcode" placeholder="">
                </div>
                <div class="input-element w-1/2">
                    <label class="block" for="p_price">Ürün Fiyatı (Türk Lirası Olarak Giriniz)</label>
                    <input type="text" name="p_price" placeholder="">
                </div>
                <div class="input-element w-1/2">
                    <label class="block" for="p_stock">Ürün Stok</label>
                    <input type="text" name="p_stock" placeholder="">
                </div>
                <div class="input-element flex justify-end w-full">
                    <input type="hidden" name="submit" value="1">
                    <button type="submit" class="focus:outline-none">Ürün Ekle</button>
                </div>
            </div>
        </form>
    </div>
</div>

Answer 1

此代码上传文件并使用自定义名称动态生成名称，因此如果您使用相同名称上传文件并且必须在项目文件夹中创建uploads文件夹，则不会发生删除文件。

$image_name=basename($_FILES["fileToUpload"]["name"]);
$alphabet = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890';
$pass = ''; //remember to declare $pass as an array
$alphaLength = strlen($alphabet) - 1; //put the length -1 in cache
for ($i = 0; $i < 15; $i++) {
    $n = rand(0, $alphaLength);
    $pass = $pass . $alphabet[$n];
}
    
    $passtype=$pass;
    $target_dir = "../uploads/";
    $imageFileType = strtolower(pathinfo($target_file,PATHINFO_EXTENSION));

    $target_file = $target_dir . basename($passtype);
    $uploadOk = 1;
   
    
      if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $target_file)) {
        echo "The file ". htmlspecialchars( basename( $passtype)). " has been uploaded.";
      } else {
        echo "Sorry, there was an error uploading your file.";
      }