PHP图片上传功能，保存在目录中，然后返回保存图片网址

这是一个简单的问题。

用于上传图像的 HTML 表单

<form enctype="multipart/form-data" action="upload.php" method="POST">
    <input type="hidden" name="MAX_FILE_SIZE" value="512000" />
    Send this file: <input name="userfile" type="file" />
    <input type="submit" value="Send File" />
</form>

执行上传的 PHP 文件

<?php
$uploaddir = '/var/www/uploads/';
$uploadfile = $uploaddir . basename($_FILES['userfile']['name']);
echo "<p>";
if (move_uploaded_file($_FILES['userfile']['tmp_name'], $uploadfile)) {
  echo "File is valid, and was successfully uploaded.'n";
} else {
   echo "Upload failed";
}
echo "</p>";
echo '<pre>';
echo 'Here is some more debugging info:';
print_r($_FILES);
print "</pre>";
?> 

源

首先，您需要一个多部分/表单数据表单进行上传。这是必须:)

<form action="upload_file.php" method="post"
enctype="multipart/form-data">
<label for="file">Filename:</label>
<input type="file" name="file" id="file"><br>
<input type="submit" name="submit" value="Submit">
</form>

PHP 部分相当简单：这将导致您的文件存储在"上传/{文件名}"中您要考虑的主要部分是如何获取文件名并返回到write_string_to_database过程，您可以在上传页面后执行一个简单的脚本，例如

save_string_to_database("upload/" . $_FILES["file"]["name"]);

会做这个伎俩。

<?php
if ($_FILES["file"]["error"] > 0)
  {
  echo "Error: " . $_FILES["file"]["error"] . "<br>";
  }
else
  {
  move_uploaded_file($_FILES["file"]["tmp_name"],
      "upload/" . $_FILES["file"]["name"]);
  }
}

对于文件上传，请尝试此操作

<?php if(isset($_POST['submit']))
{
$ImageName = $_FILES['photo']['name'];
$fileElementName = 'photo';
$path = 'images/'; 
$location = $path . $_FILES['photo']['name']; 
move_uploaded_file($_FILES['photo']['tmp_name'], $location); 
} ?>
<form name="form1" id="form1" method="post" action="" enctype="multipart/form-data">
<input type="file" name="photo">
<input type="submit" name="submit">
</form>

这是我的函数，变量$ten_anh是html中文件图像的名称。

function upload_anh($ten_anh){ //$ten_anh la ten tren html vi du "avatar"
if(isset($_FILES[$ten_anh])){
     $errors= array();
     $file_name = $_FILES[$ten_anh]['name'];
     $file_size =$_FILES[$ten_anh]['size'];
     $file_tmp =$_FILES[$ten_anh]['tmp_name'];
     $file_type=$_FILES[$ten_anh]['type'];
     $file_ext=strtolower(end(explode('.',$_FILES[$ten_anh]['name'])));
     $expensions= array("jpeg","jpg","png");
     if(in_array($file_ext,$expensions)=== false){
            $errors[]="Không chấp nhận định dạng ảnh có đuôi này, mời bạn chọn JPEG hoặc PNG.";
     }
     if($file_size > 2097152){
            $errors[]='Kích cỡ file nên là 2 MB';
     }
     if(empty($errors)==true){
            move_uploaded_file($file_tmp,"../images/".$file_name);
            echo "Thành công!!!";
     }
     else{
            print_r($errors);
     }
}

}

例： - 网页代码：

<input type="file" id="avatar" name="avatar"accept="image/png, image/jpeg"      required/>

• 调用函数 PHP： upload_anh('avatar');

<form method='post' action='' enctype='multipart/form-data'> 
  Name  : <input type="text" name="name"  required=""/><br><br>
  Code  : <input type="text" name="code"  required=""/><br><br>
  Price : <input type="text" name="price" required=""/><br><br>
  Image : <input type="file" name="image" required=""/><br><br>
  <button type='submit' class='buy' name="submit">Add Now</button>
</form>
<!--insert data  -->
<?php
session_start();
include('db.php');
if(isset($_POST["submit"]));
{
  /*echo "<pre>";
  print_r($_POST);
  print_r($_FILES);*/
  $name  = $_POST["name"];
  $code  = $_POST["code"];
  $price = $_POST["price"];
  $image = $_FILES["image"]["name"];
  /* folder image save */
  // $target_dir  = "/var/www/html/shivam/new/upload/";
  // $target_file = $target_dir.basename($_FILES["image"]["name"]);
  // /*echo "1121".$target_file;*/
  // $name = basename($_FILES["image"]["name"]);
  // mysqli_query($con,$qry);
  // /* move file */                                   
  // move_uploaded_file($_FILES['image']['tmp_name'],$target_dir.$name);
  /* move_uploaded_file($tmp_name, "$target_dir/$name");*/
  /* end */
  $uploaddir = '/var/www/html/uploads/';
$uploadfile = $uploaddir . basename($_FILES['image']['name']);
echo '44'.$uploadfile;
echo "<p>";
if (move_uploaded_file($_FILES['image']['tmp_name'], $uploadfile)) {
  echo "File is valid, and was successfully uploaded.'n";
} else {
   echo "Upload failed";
}
echo "</p>";
echo '<pre>';
echo 'Here is some more debugging info:';enter code here
print_r($_FILES);
print "</pre>";
}
?>