我们在Mahara网站上遇到问题，无论大小如何，我们都无法上传任何文件。
深入研究代码，$ _FILES数组返回：
Array
(
[userfile] => Array
(
[name] => Array
(
[0] => file.jpg
)
[type] => Array
(
[0] =>
)
[tmp_name] => Array
(
[0] =>
)
[error] => Array
(
[0] => 2
)
[size] => Array
(
[0] => 0
)
)
）
现在，我已经检查了我们的php ini设置（并检查它们是否在phpinfo（）中应用）：
我们有：
post_max_size 4000M
upload_max_filesize 4000M
file_uploads On
max_file_uploads 20
memory_limit 128M
max_execution_time 600
upload_tmp_dir“没有价值”
我不确定upload_tmp_dir是否应该有什么东西，但是我们在这台服务器上运行了2个网站而另一个网站没有上传文件的问题，所以我假设这不是问题。
据我所知，我们的服务器设置还可以。
在表单的HTML中：
<div id="instconf_artefactid_upload_container" class="fileupload">
<input type="hidden" name="instconf_artefactid_uploadnumber" id="instconf_artefactid_uploadnumber" value="1"><input type="hidden" name="instconf_artefactid_upload" id="instconf_artefactid_upload" value="0">
<input type="hidden" name="MAX_FILE_SIZE" value="4194299904">
<div id="instconf_artefactid_upload_messages"></div>
<table class="fileuploadlicense"><tbody></tbody></table>
<div class="uploadform">
<label for="instconf_artefactid_userfile">Upload file</label>
<span id="instconf_artefactid_userfile_container"><input type="file" class="file" id="instconf_artefactid_userfile" name="userfile[]" multiple="" size="20"></span>
<span id="instconf_artefactid_userfile_maxuploadsize">(Maximum upload size 3.9GB)</span>
</div>
<div id="file_dropzone_container" class="instconf_artefactid">
<div id="fileDropzone" class="dropzone-previews" style="display:none;">
<div class="dz-message">Drop files here to upload</div>
</div>
</div>
<div class="uploadform">
<div id="instconf_artefactid_uploadsubmit_container">
<noscript>&lt;input type="submit" class="submit" name="instconf_artefactid_upload" id="instconf_artefactid_upload" value="Upload" /&gt;</noscript>
</div>
</div>
</div>
因此表单的MAX_FILE_SIZE为 4194299904 ，但无论我尝试上传哪个文件，即使它是一个大约100个字节的1像素图像，我也会遇到同样的错误。
我们在CentOS服务器上运行的所有Mahara实例似乎都是一样的，但上传工作在我的Windows localhost上工作正常。
有谁知道可能导致这种情况的原因？
感谢。
如果你想要完整的HTML格式，那就是：
<form class="pieform" name="instconf" method="post" action="" id="instconf" enctype="multipart/form-data">
<table cellspacing="0" border="0" class="maharatable"><tbody>
<tr id="instconf_title_header" class="text">
<th><label for="instconf_title">Block title</label></th>
</tr>
<tr id="instconf_title_container" class="text">
<td><input type="text" class="text autofocus" id="instconf_title" name="title" tabindex="0" maxlength="255" aria-describedby="" value="Image"></td>
</tr>
<tr id="instconf_artefactid_header" class="filebrowser">
<th><label for="instconf_artefactid">Image</label></th>
</tr>
<tr id="instconf_artefactid_container" class="filebrowser">
<td><p id="instconf_artefactid_empty_selectlist">No files found</p>
<table id="instconf_artefactid_selectlist" class="fullwidth hidden">
<thead>
<tr>
<th></th>
<th>Name</th>
<th>Description</th>
<th></th>
</tr>
</thead>
<tbody>
</tbody>
</table>
<input type="hidden" name="folder" id="instconf_artefactid_folder" value="0">
<input type="hidden" name="instconf_artefactid_changefolder" id="instconf_artefactid_changefolder" value="">
<input type="hidden" name="instconf_artefactid_foldername" id="instconf_artefactid_foldername" value="Home">
<div id="instconf_artefactid_open_upload_browse_container" class="hidden">
<input type="submit" class="buttondk" id="instconf_artefactid_open_upload_browse" name="browse" value="Select a file">
</div>
<div id="instconf_artefactid_upload_browse" class="upload_browse select">
<input type="hidden" name="instconf_artefactid_owner" id="instconf_artefactid_owner" value="user">
<input type="hidden" name="instconf_artefactid_ownerid" id="instconf_artefactid_ownerid" value="">
<input type="hidden" name="instconf_artefactid_changeowner" id="instconf_artefactid_changeowner" value="">
<div id="instconf_artefactid_ownertabs">
<ul class="artefactchooser-tabs files">
<li class="current"><a class="changeowner" href="http://mahara.bedford.ac.uk/view/blocks.php?id=5708&amp;change=1&amp;action_configureblockinstance_id_30008=1&amp;owner=user">My files<span class="accessible-hidden">(tab selected)</span></a></li>
<li><a class="changeowner" href="http://mahara.bedford.ac.uk/view/blocks.php?id=5708&amp;change=1&amp;action_configureblockinstance_id_30008=1&amp;owner=group">Group files<span class="accessible-hidden">(tab)</span></a></li>
<li><a class="changeowner" href="http://mahara.bedford.ac.uk/view/blocks.php?id=5708&amp;change=1&amp;action_configureblockinstance_id_30008=1&amp;owner=institution">Institution files<span class="accessible-hidden">(tab)</span></a></li>
<li><a class="changeowner" href="http://mahara.bedford.ac.uk/view/blocks.php?id=5708&amp;change=1&amp;action_configureblockinstance_id_30008=1&amp;owner=site">Site files<span class="accessible-hidden">(tab)</span></a></li>
</ul>
</div>
<div id="artefactchooser-body">
<div id="instconf_artefactid_ownersubtabs" class="hidden">
</div>
<div id="instconf_artefactid_upload_container" class="fileupload">
<input type="hidden" name="instconf_artefactid_uploadnumber" id="instconf_artefactid_uploadnumber" value="1"><input type="hidden" name="instconf_artefactid_upload" id="instconf_artefactid_upload" value="0">
<input type="hidden" name="MAX_FILE_SIZE" value="4194299904">
<div id="instconf_artefactid_upload_messages"></div>
<table class="fileuploadlicense"><tbody></tbody></table>
<div class="uploadform">
<label for="instconf_artefactid_userfile">Upload file</label>
<span id="instconf_artefactid_userfile_container"><input type="file" class="file" id="instconf_artefactid_userfile" name="userfile[]" multiple="" size="20"></span>
<span id="instconf_artefactid_userfile_maxuploadsize">(Maximum upload size 3.9GB)</span>
</div>
<div id="file_dropzone_container" class="instconf_artefactid">
<div id="fileDropzone" class="dropzone-previews" style="display:none;">
<div class="dz-message">Drop files here to upload</div>
</div>
</div>
<div class="uploadform">
<div id="instconf_artefactid_uploadsubmit_container">
<noscript>&lt;input type="submit" class="submit" name="instconf_artefactid_upload" id="instconf_artefactid_upload" value="Upload" /&gt;</noscript>
</div>
</div>
</div>
<div id="instconf_artefactid_upload_disabled" class="uploaddisabled hidden">You do not have permission to add content to this folder.</div>
<div id="instconf_artefactid_foldernav" class="foldernav">
Home
</div>
<div id="instconf_artefactid_filelist_container">
<table id="instconf_artefactid_filelist" class="tablerenderer filelist fullwidth">
<thead>
<tr>
<th></th>
<th>Name</th>
<th>Description</th>
<th class="filetags">Tags</th>
<th class="right"></th>
<th class="right nowrap">
<span class="accessible-hidden">Edit</span>
</th>
</tr>
</thead>
<tbody>
<tr id="file:1886" class="r0 directory-item folder">
<td class="icon-container">
<img src="http://mahara.bedford.ac.uk/theme/raw/static/images/folder.png">
</td>
<td class="filename">
<a href="http://mahara.bedford.ac.uk/view/blocks.php?id=5708&change=1&action_configureblockinstance_id_30008=1&folder=1886&owner=user" id="changefolder:1886" class="changefolder" title="Go to images">
<span class="accessible-hidden">Folder:</span>
<span class="display-title ">images</span>
</a>
</td>
<td class="filedescription">Image files</td>
<td class="filetags"></td>
<td class="right s nowrap">
<input type="submit" class="btn-big-edit tag-edit submit" name="instconf_artefactid_edit[1886]" value="Edit" title="Edit">
</td>
<!-- Ensure space for 3 buttons (in the case of a really long single line string in a user input field -->
<td class="right s nowrap">
</td>
</tr>
</tbody>
</table>
<p>
<a href="http://mahara.bedford.ac.uk/artefact/file/downloadfolder.php?folder=0">Download folder content as a zip file</a>
</p>
</div>
<table class="hidden">
<tbody id="instconf_artefactid_edit_placeholder">
<tr id="instconf_artefactid_edit_row" class="hidden editrow">
<td></td>
<td colspan="5" class="fileedittablewrap">
<table class="fileedittable">
<tbody>
<tr>
<th colspan="2" id="instconf_artefactid_edit_heading" class="fl">
</th>
</tr>
<tr class="required">
<th><label>Name</label> <span class="requiredmarker">*</span></th>
<td><input type="text" class="text" name="instconf_artefactid_edit_title" id="instconf_artefactid_edit_title" value="" size="40"></td>
</tr>
<tr>
<th><label>Description</label></th>
<td><input type="text" class="text" name="instconf_artefactid_edit_description" id="instconf_artefactid_edit_description" value="" size="40"></td>
</tr>
<tr class="tags">
<th><label>Tags</label></th>
<td>
<div><div><a href="">Show my tags</a></div><input name="instconf_artefactid_edit_tags" size="40" id="instconf_artefactid_edit_tags" value=""> <span class="help"><a href="" onclick="contextualHelp(null,null,"artefact","file",null,"tags",this); return false;"><img src="http://mahara.bedford.ac.uk/theme/raw/static/images/help.png" alt="Help" title="Help"></a></span></div>
<span> </span>
</td>
</tr>
<tr>
<td></td>
<td class="description">Enter comma-separated tags for this item. Items tagged with 'profile' are displayed in your sidebar.</td>
</tr>
<tr>
<th><label>Allow comments</label></th>
<td><input type="checkbox" name="instconf_artefactid_edit_allowcomments" id="instconf_artefactid_edit_allowcomments"></td>
</tr>
<tr>
<td></td>
<td>
<input type="submit" class="submit" name="instconf_artefactid_update[]" id="instconf_artefactid_edit_artefact" value="Save changes">
<input type="submit" class="cancel" name="instconf_artefactid_canceledit" id="instconf_artefactid_edit_cancel" value="Cancel">
</td>
</tr>
<tr><td colspan="2" id="instconf_artefactid_edit_messages"></td></tr>
</tbody>
</table>
</td>
</tr>
</tbody>
</table>
</div>
</div>
</td>
</tr>
<tr id="instconf_showdescription_header" class="checkbox">
<th><label for="instconf_showdescription">Show description</label></th>
</tr>
<tr id="instconf_showdescription_container" class="checkbox">
<td><input type="checkbox" class="checkbox" id="instconf_showdescription" name="showdescription" tabindex="0" aria-describedby=""></td>
</tr>
<tr id="instconf_width_header" class="text">
<th><label for="instconf_width">Width</label></th>
</tr>
<tr id="instconf_width_container" class="text">
<td><input type="text" class="text" id="instconf_width" name="width" size="3" tabindex="0" aria-describedby="instconf_width_description " value=""></td>
</tr>
<tr class="text">
<td class="description"><span id="instconf_width_description">Specify the width for your image (in pixels). The image will be scaled to this width. Leave it blank to use the original size of the image. If the original size is too big, it will be scaled to the width of the block.</span></td>
</tr>
<tr id="instconf_retractable_header" class="checkbox">
<th><label for="instconf_retractable">Retractable</label></th>
</tr>
<tr id="instconf_retractable_container" class="checkbox">
<td><input type="checkbox" class="checkbox" id="instconf_retractable" name="retractable" tabindex="0" aria-describedby="instconf_retractable_description "></td>
</tr>
<tr class="checkbox">
<td class="description"><span id="instconf_retractable_description">Select to allow this block to be retracted when the header is clicked.</span></td>
</tr>
<tr id="instconf_retractedonload_header" class="checkbox">
<th><label for="instconf_retractedonload">Automatically retract</label></th>
</tr>
<tr id="instconf_retractedonload_container" class="checkbox">
<td><input type="checkbox" class="checkbox" id="instconf_retractedonload" name="retractedonload" tabindex="0" aria-describedby="instconf_retractedonload_description " disabled="disabled"></td>
</tr>
<tr class="checkbox">
<td class="description"><span id="instconf_retractedonload_description">Select to automatically retract this block.</span></td>
</tr>
<tr id="instconf_action_configureblockinstance_id_30008_container" class="submitcancel">
<td><input type="submit" class="submitcancel submit" id="instconf_action_configureblockinstance_id_30008" name="action_configureblockinstance_id_30008" tabindex="0" aria-describedby="" value="Save"> <input type="submit" class="submitcancel cancel" id="cancel_instconf_action_configureblockinstance_id_30008" name="cancel_action_configureblockinstance_id_30008" tabindex="0" aria-describedby="" value="Cancel"></td>
</tr>
</tbody></table>
<input type="hidden" class="hidden" id="instconf_blockconfig" name="blockconfig" aria-describedby="" value="30008">
<input type="hidden" class="hidden" id="instconf_id" name="id" aria-describedby="" value="5708">
<input type="hidden" class="hidden" id="instconf_change" name="change" aria-describedby="" value="1">
<input type="hidden" class="hidden" id="instconf_new" name="new" aria-describedby="" value="">
<input type="hidden" class="hidden" id="instconf_sesskey" name="sesskey" aria-describedby="" value="b6WAg98wGVcOer7x">
<input type="hidden" name="pieform_instconf" aria-describedby="" value="">
</form>