图片上传使用窗体

Question

我一直有与用户使用该登记表上载他们的图像的问题：

<?php 
errors = array(); 
$missing = array(); 
// check if the form has been submitted 
if (isset($_POST{'submit'}) && !empty($_FILES)){ 
    require_once('./classes/Ps2/Upload.php'); 
try { 
    $upload = new Ps2_Upload('my address'); 
    $upload->move(); 
    $messages = $upload->getMessages(); 
    }catch (Exception $e) { 
    echo $e->getMessage(); 
    } 

    $tmp_name = $_FILES['image']['tmp_name']; 
    $type = $_FILES['image']['type']; 
    $name = $_FILES['image']['name']; 
    $size = $_FILES['image']['size']; 
    $names = $_POST['names']; 
    $number = $_POST['number']; 
    $email = $_POST['email']; 
    $seminar = $_POST['seminar']; 
    $address = $_POST['address']; 

$response = recaptcha_check_answer($private_key, $_SERVER['REMOTE_ADDR'],  $_POST['recaptcha_challenge_field'], $_POST['recaptcha_response_field']); 
if (!$response->is_valid) { 
$errors['recaptcha'] = true; 
} 
<? 

这里是（即影响所述图像上载至少部分）的形式为：

<form id="register" name="register" method="post" enctype="multipart/form-data" action=""> 
    <p> 
    <fieldset><legend class="caption">Registration Details</legend> 
    <p> 
     <label for="image">Upload image photograph: 
     <?php if ($missing && in_array('image', $missing)) { ?> 
<span class="warning">Please pick your passport</span> 
<?php } ?> 
     </label> 
    <input type="hidden" name="MAX_FILE_SIZE" value="<?php echo $max; ?>"> 
    <input name="image" id="image" type="file" value="image" tabindex="1"> 
     </p> 

Answer 1

如果你想要做的是确保用户不会跳过选择要上传的文件，那么你可以做的Javascript检查：

<script type="text/javascript"> 
    function checkImage() 
    { 
     if (document.getElementById('image').value == "") 
     { 
      alert("Please select an image to upload."); 
      return false; 
     } 

     return true; 
    } 
</script> 

<form onsubmit="return checkImage()" ... > 

如果这不是你的意思，请澄清你面临的问题。