2

我遇到了以下两个问题： 1. 脚本的下面一行没有检查最大文件大小，而是显示Please Select a Photo.

//Check that the file is not too big
if ($_FILES[$file_field]['size'] > $max_size) {
    $out['error'][] = "File is too big";
  }

2.我想让用户上传五张照片，但需要一张照片，这意味着用户有权上传1-5张照片但需要一张照片，他/她不能提交所有输入的表格空的。我该如何解决这两个问题？

<?php

function uploadFile ($file_field = null, $check_image = false, $random_name = false) {

//Config Section    
//Set file upload path
$path = 'Productpic/'; //with trailing slash
//Set max file size in bytes
$max_size = 2097152;
//Set default file extension whitelist
$whitelist_ext = array('jpg','png','gif', 'JPG');
//Set default file type whitelist
$whitelist_type = array('image/jpeg', 'image/png','image/gif');

//The Validation
// Create an array to hold any output
$out = array('error'=>null);

if (!$file_field) {
$out['error'][] = "Please specify a valid form field name";           
}

if (!$path) {
$out['error'][] = "Please specify a valid upload path";               
}

if (count($out['error'])>0) {
return $out;
}

//Make sure that there is a file
if((!empty($_FILES[$file_field])) && ($_FILES[$file_field]['error'] == 0)) {

// Get filename
$file_info = pathinfo($_FILES[$file_field]['name']);
$name = $file_info['filename'];
$ext = $file_info['extension'];

//Check file has the right extension           
if (!in_array($ext, $whitelist_ext)) {
  $out['error'][] = "Invalid file Extension";
}

//Check that the file is of the right type
if (!in_array($_FILES[$file_field]["type"], $whitelist_type)) {
  $out['error'][] = "Invalid file Type";
}

//Check that the file is not too big
if ($_FILES[$file_field]['size'] > $max_size) {
    $out['error'][] = "File is too big";
  }

//If $check image is set as true
if ($check_image) {
  if (!getimagesize($_FILES[$file_field]['tmp_name'])) {
    $out['error'][] = "The file you trying to upload is not an Image, we only accept images";
  }
}

//Create full filename including path
if ($random_name) {

  // Generate random filename
  $tmp = str_replace(array('.',' '), array('',''), microtime());

  if (!$tmp || $tmp == '') {
    $out['error'][] = "File must have a name";
  }     
  $newname = $tmp.'.'.$ext;                                
} else {
    $newname = $name.'.'.$ext;
}

//Check if file already exists on server
if (file_exists($path.$newname)) {
  $out['error'][] = "The image you trying to upload already exists, please upload only once";
}

if (count($out['error'])>0) {
  //The file has not correctly validated
  return $out;
} 

if (move_uploaded_file($_FILES[$file_field]['tmp_name'], $path.$newname)) {
  //Success

  $out['filepath'] = $path;
  $out['filename'] = $newname;
  return $out;
} else {
  $out['error'][] = "Server Error!";
}

} else {
$out['error'][] = "Please select a photo";
return $out;
}      
}
?>



<?php

if (isset($_POST['submit'])) {

$file = uploadFile('file', true, false);
if (!is_array($file['error'])) {
$message = '';
$sub=1;
$message = "File uploaded successfully";
echo $message;
} 

}
?>



<form action="" method="post" enctype="multipart/form-data" name="form1" id="form1">
<?php
ini_set( "display_errors", 0);
if($sub==0)
{
?>
<input name="file" type="file" size="20" /><span><?php

if (isset($_POST['submit'])) {

$file = uploadFile('file', true, false);
if (is_array($file['error'])) {
$message = '';
foreach ($file['error'] as $msg) {
  $message = $msg;    
}
} 
echo $message;
}
?></span> <br>
<input name="submit" type="submit" value="Upload" />
<?php
}
?>
</form>
4

1 回答 1

0

确保有关文件路径。如果路径为真，您就可以完成这项工作。我建议您使用 exif_imagetype() 函数检查文件属性，它比 getimage size 更快更好。在最大文件问题中，您应该使用 filesize() 函数。在检查之前需要确保是文件上传？上传的文件是 $_FILES('tmp_name')。

于 2013-02-11T05:54:56.100 回答