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[fpm] Document PHP 8.5 FPM changes: fastcgi.script_path_encoded and access log limit #5855

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[fpm] Document PHP 8.5 FPM changes: fastcgi.script_path_encoded and access log limit #5855

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[fpm] Document PHP 8.5 FPM changes: fastcgi.script_path_encoded and a…
lacatoire Aug 27, 2026
e59fbb2
Link ProxyPass to the Apache documentation
lacatoire Oct 1, 2026
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11 changes: 7 additions & 4 deletions appendices/migration85/other-changes.xml
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Original file line number Diff line number Diff line change
@@ -1,5 +1,5 @@
<?xml version="1.0" encoding="utf-8"?>
<sect1 xml:id="migration85.other-changes">
<sect1 xml:id="migration85.other-changes" xmlns:xlink="http://www.w3.org/1999/xlink">
<title>Other Changes</title>

<sect2 xml:id="migration85.other-changes.core">
Expand Down Expand Up @@ -67,9 +67,12 @@
<title>FPM</title>

<simpara>
FPM with httpd ProxyPass optionally decodes the full script path. Added
<!-- <link linkend="ini.fastcgi.script_path_encoded"-->fastcgi.script_path_encoded<!-- </link> -->
INI setting to prevent this new behavior.
FPM with httpd
<link xlink:href="https://httpd.apache.org/docs/current/mod/mod_proxy.html#proxypass"><literal>ProxyPass</literal></link>
can optionally decode the full script path as of PHP 8.5.0.
The new <link linkend="ini.fastcgi.script-path-encoded">fastcgi.script_path_encoded</link>
INI setting controls this behavior; it defaults to <literal>1</literal> to preserve
the previous behavior of not decoding the path.
</simpara>

<simpara>
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28 changes: 25 additions & 3 deletions install/fpm/configuration.xml
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Expand Up @@ -806,10 +806,32 @@
<type>string</type>
</term>
<listitem>
<para>
<simpara>
The access log file.
Default value: not set
</para>
Default value: not set.
</simpara>
<simpara>
As of PHP 8.5.0, the access log line length limit respects the
global <link linkend="log-limit">log_limit</link> setting.
</simpara>
</listitem>
</varlistentry>
<varlistentry xml:id="ini.fastcgi.script-path-encoded">
<term>
<parameter>fastcgi.script_path_encoded</parameter>
<type>bool</type>
</term>
<listitem>
<simpara>
When enabled (<literal>1</literal>, the default as of PHP 8.5.0),
FPM does not URL-decode the <literal>SCRIPT_FILENAME</literal> sent
by httpd
<link xlink:href="https://httpd.apache.org/docs/current/mod/mod_proxy.html#proxypass"><literal>ProxyPass</literal></link>,
preserving the previous behavior.
Set to <literal>0</literal> to opt into the new behavior where FPM
URL-decodes the full script path.
Available as of PHP 8.5.0.
</simpara>
</listitem>
</varlistentry>
<varlistentry xml:id="access-format">
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