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What's the effect of installing v 8.3
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After installing v8.3., the most prominent error message is

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Creation of dynamic property (property name) is deprecated
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This error was introduced in PHP 8.2.
In PHP 8.2 and later, setting a value to an undeclared class property is deprecated,
and emits a deprecation notice the first time the property is set
during the lifetime of the application execution.
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How the error appear in the local website of phpkobo.com
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Most sample PHP applications have `error_reporting( 0 )` in a configiration
file, so "Creation of dynamic property (property name) is deprecated"
will be suppressed.

The error tend to appear outside the sample PHP applications. You can see the
error message logged in the following file:

■ phpkobo/website/public_html/mod/site/eh_main/log
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How to fix/suppress the error message
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The most straight forward way is to declear all properties used in the class.
But sometimes, it's very cumbersome for legacy code. An alternative methoid
is to allow dynamic properties using #[\AllowDynamicProperties]. For example,

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#[\AllowDynamicProperties]
class CObject {
	..............
	..............
	..............
	..............
}
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A great thing about #[\AllowDynamicProperties] is if you put it on an
class, it applys to the extended classes.
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