如何使用PHP和MySQL从文件输入字段中保存图像？

Question

如何使用PHPMySQL从文件输入字段安全地保存图像？

这里是输入文件字段。

<input type="file" name="pic" id="pic" size="25" /> 

Answer 1

http://php.net/file_upload涵盖了你需要知道的一切。

Answer 2

这是一个简单的例子，它应该工作。

虽然你可能要添加检查图像类型，文件大小等

<?php 
    $image = $_POST['pic']; 
    //Stores the filename as it was on the client computer. 
    $imagename = $_FILES['pic']['name']; 
    //Stores the filetype e.g image/jpeg 
    $imagetype = $_FILES['pic']['type']; 
    //Stores any error codes from the upload. 
    $imageerror = $_FILES['pic']['error']; 
    //Stores the tempname as it is given by the host when uploaded. 
    $imagetemp = $_FILES['pic']['tmp_name']; 

    //The path you wish to upload the image to 
    $imagePath = "images/"; 

    if(is_uploaded_file($imagetemp)) { 
     if(move_uploaded_file($imagetemp, $imagePath . $imagename)) { 
      echo "Sussecfully uploaded your image."; 
     } 
     else { 
      echo "Failed to move your image."; 
     } 
    } 
    else { 
     echo "Failed to upload your image."; 
    } 
?> 

Answer 3

<?php 
if ($_SERVER['REQUEST_METHOD'] == 'POST') { 
    $tmpFile = $_FILES['pic']['tmp_name']; 
    $newFile = '/new_location/to/file/'.$_FILES['pic']['name']; 
    $result = move_upload_file($tmpFile, $newFile); 
    echo $_FILES['pic']['name']; 
    if ($result) { 
     echo ' was uploaded<br />'; 
    } else { 
     echo ' failed to upload<br />'; 
    } 
} 
?> 
<form action="" enctype="multipart/form-data" method="POST> 
<input type="file" name="pic" /> 
<input type="submit" value="Upload" /> 
</form>