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<div dir="ltr" data-setdir="false">Its fixed!<br><br>Ending up being a Hosting company issue. Below is that they said they changed to fix in case anyone else comes across this:<br><br><blockquote><div><div class="ydp88cb1b5eintercom-block-paragraph ydp88cb1b5ee16pl8n50 ydp88cb1b5eintercom-7b9xxp">During testing, we were able to reproduce behavior consistent with the PHP warnings you previously reported.</div><div class="ydp88cb1b5eintercom-block-paragraph ydp88cb1b5ee16pl8n50 ydp88cb1b5eintercom-7b9xxp">The issue we found was that PHP was unable to create temporary files in the configured temporary directory (<code>D:\PHP\temp</code>). This was consistent with the warnings regarding temporary file creation and POST data buffering.<br><br></div><div class="ydp88cb1b5eintercom-block-paragraph ydp88cb1b5ee16pl8n50 ydp88cb1b5eintercom-7b9xxp">To
address this, we updated the permissions on the PHP temporary directory
and confirmed that PHP can now successfully create temporary files.</div><div class="ydp88cb1b5eintercom-block-paragraph ydp88cb1b5ee16pl8n50 ydp88cb1b5eintercom-7b9xxp">After
making this change, we performed additional testing using a standalone
PHP form and successfully processed POST requests larger than 20 KB.
This exceeds the approximately 14 KB threshold where you reported the
PMWiki save failures occurring.<br><br></div><div class="ydp88cb1b5eintercom-block-paragraph ydp88cb1b5ee16pl8n50 ydp88cb1b5eintercom-7b9xxp">Based
on our testing, the issue does not appear to be related to the
configured PHP POST size limit or IIS request size limits. </div></div></blockquote><br></div><div><br></div>
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On Thursday, June 11, 2026 at 09:18:37 AM EDT, Michael Elliott <melliott42@yahoo.com> wrote:
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<div dir="ltr">Petko, Team,<br clear="none"><br clear="none">Thank you for the quick response. I am working through all the options you presented.<br clear="none"><br clear="none">Also, the troubleshooting page is really good. I just never needed it before using PMwiki for many years. Shows how solid its been.<br clear="none"><br clear="none">The Troubleshooting item below seemed to have my name on it but in initially creating a new page the issue still exists:<br clear="none"><br clear="none"><blockquote><span>Very long pages with thousands of lines may appear blank after adding a
few additional lines. This may be preformatted text, table, or text
inside conditional markup, or text in a custom markup directive.</span><br clear="none"><span><span><b><span><span class="yiv8046305171ydp87f3232ehlt yiv8046305171ydp87f3232ephp"><code title="php" class="yiv8046305171ydp87f3232eescaped yiv8046305171ydp87f3232ehlt yiv8046305171ydp87f3232ephp yiv8046305171ydp87f3232ehljs yiv8046305171ydp87f3232elanguage-php">@<span class="yiv8046305171ydp87f3232ehljs-title yiv8046305171ydp87f3232efunction_ yiv8046305171ydp87f3232einvoke__">ini_set</span>(<span class="yiv8046305171ydp87f3232ehljs-string">'pcre.backtrack_limit'</span>, <span class="yiv8046305171ydp87f3232ehljs-number">10000000</span>);<br clear="none"><br clear="none"></code></span></span></b></span></span>Testing this further...</blockquote><br clear="none"><br clear="none">I'll add that on some saves of pages with more data I sometimes get this (below) which would suggest it is in the PHP config:<span style="white-space:pre-wrap;"><br clear="none"><br clear="none"></span><blockquote><span style="white-space:pre-wrap;">PHP Notice: Unknown: file created in the system's temporary directory in Unknown on line 0</span><div dir="ltr"><pre>PHP Warning: Unknown: Unable to create temporary file, Check permissions in temporary files directory. in Unknown on line 0
PHP Warning: Unknown: POST data can't be buffered; all data discarded in Unknown on line 0</pre></div></blockquote></div><div dir="ltr"><br clear="none">Thank you,<br clear="none"><br clear="none">Michael</div><div><br clear="none"></div>
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On Thursday, June 11, 2026 at 07:18:54 AM EDT, Petko Yotov <5ko@5ko.fr> wrote:
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<div><div dir="ltr">If this is a bug with the PmWiki core we'll fix it ASAP.<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">I just saved a 350kb page on pmwiki.org and the same one on my laptop <br clear="none"></div><div dir="ltr">wiki, both running the pre-release after version 2.6.0.<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">What messages appear on the wiki or in the server's PHP error logs? A <br clear="none"></div><div dir="ltr">500 error almost certainly contains some indication in the error logs.<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Do you see a blank 500 Internal Server Error page, or does the edit form <br clear="none"></div><div dir="ltr">reappear unsaved, or does it redirect to the page that was not modified?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">If you press Preview, does the preview page work?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Can you upload files larger than 14kb via the wiki?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Do you have mod_security enabled, or something similar that may block <br clear="none"></div><div dir="ltr">the request for specific security-related keywords in the posted text?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Do you have enough disk space?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Can you save smaller pages, subsequently?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Can you create new pages that are larger? Can you delete pages? Can you <br clear="none"></div><div dir="ltr">delete larger pages?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Is the problem with the full disk file size <br clear="none"></div><div dir="ltr">(pmwiki/wiki.d/Main.HomePage) or with the size of the wiki markup text <br clear="none"></div><div dir="ltr">in the edit form?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Do you use any custom page store class?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Does this happen in one wikigroup, or in all wikigroups?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Can you save a small page but not a large one in the same wikigroup? <br clear="none"></div><div dir="ltr">Check directory/file permissions under wiki.d/.<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Do you have recipes that are only enabled on ?action=edit or that modify <br clear="none"></div><div dir="ltr">$EditFunctions?<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Does this happen in an empty PmWiki installation? If so, the problem may <br clear="none"></div><div dir="ltr">be with the server configuration, otherwise it is more likely with a <br clear="none"></div><div dir="ltr">local PmWiki customization. See Troubleshooting on how to track what is <br clear="none"></div><div dir="ltr">causing this.<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr"> <a rel="nofollow noopener noreferrer" shape="rect" target="_blank" href="https://pmwiki.org/Troubleshooting">https://pmwiki.org/Troubleshooting</a><br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">Petko<br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr"><br clear="none"></div><div dir="ltr">On 11/06/2026 12:40, Michael Elliott wrote:<br clear="none"></div><div dir="ltr">> Hello,<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> I started having an issue where saving pages where the data size is<br clear="none"></div><div dir="ltr">> larger than ~14.5 fail. I have multiple PMwiki instances and it is<br clear="none"></div><div dir="ltr">> happening on all of them. Upgrading to the latest PMwiki version had<br clear="none"></div><div dir="ltr">> no effect. I also purge all page history and also tried recreating<br clear="none"></div><div dir="ltr">> the page using a new name with no effect.<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> I have been working intensely with my hosting company and they say<br clear="none"></div><div dir="ltr">> there should be no issue (below).<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> We checked the standard server-side request size limits. PHP is<br clear="none"></div><div dir="ltr">> currently allowing POST requests up to 24 MB, and IIS request<br clear="none"></div><div dir="ltr">> filtering is allowing up to approximately 28.6 MB. A 14 KB save is far<br clear="none"></div><div dir="ltr">> below both of those limits, so this does not appear to be caused by<br clear="none"></div><div dir="ltr">> the normal PHP POST size limit or IIS request-size limit.<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> We are continuing to review this from the IIS/FastCGI side and will<br clear="none"></div><div dir="ltr">> check for any related server-side errors or rules that may be<br clear="none"></div><div dir="ltr">> triggering the 500 error during the PMWiki save request.<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> What can you recommend?<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> Thank you,<br clear="none"></div><div dir="ltr">> <br clear="none"></div><div dir="ltr">> Michael Elliott<br clear="none"></div></div>
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