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Document environment variable expansion in configuration #5181

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Document environment variable expansion in configuration
yariksheptykin Jan 23, 2026
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blance para
yariksheptykin Jan 26, 2026
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15 changes: 15 additions & 0 deletions install/fpm/configuration.xml
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Expand Up @@ -1003,6 +1003,21 @@
</listitem>
</varlistentry>
</variablelist>
<para>
Configuration values can be set using environment variable expansion.
Setting default values when the environment variable is unset or null is also supported.
For example:
<example>
<title>Using environment variable expansion</title>
<programlisting role="ini">
<![CDATA[
listen = /var/run/php-fpm-$POOL_NAME.sock
user = ${USER_NAME:-www-data}
group = ${USER_NAME:-www-data}
]]>
</programlisting>
</example>
</para>
<para>
It's possible to pass additional environment variables and update PHP settings of a certain pool.
To do this, you need to add the following options to the pool configuration file.
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