diff --git a/language-snippets.ent b/language-snippets.ent
index fbac1d5b12cb..2558eae27747 100644
--- a/language-snippets.ent
+++ b/language-snippets.ent
@@ -4,8 +4,6 @@
 <!ENTITY installation.enabled.disable 'This extension is enabled by default. It may be disabled by using the following option at compile time: '>
 
 <!-- Not used in EN anymore -->
-<!ENTITY changelog.randomseed '<row xmlns="http://docbook.org/ns/docbook"><entry>4.2.0</entry><entry>The random
-number generator is seeded automatically.</entry></row>'>
 
 <!ENTITY warn.deprecated.feature-5-3-0.removed-6-0-0 '<warning
 xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
@@ -92,9 +90,6 @@ do not support some characters in filenames, namely <literal>&lt;|&gt;*?":</lite
 are not supported either. Contrary to some extraction tools, this method does not replace these characters with
 an underscore, but instead fails to extract such files.</simpara></note>'>
 
-<!ENTITY note.func-callback '<note xmlns="http://docbook.org/ns/docbook"><simpara>Instead of a function name, an
-array containing an object reference and a method name can also be
-supplied.</simpara></note>'>
 
 <!ENTITY note.func-callback-exceptions '<note xmlns="http://docbook.org/ns/docbook"><simpara>Callbacks registered
 with functions such as <function>call_user_func</function> and <function>call_user_func_array</function> will not be
@@ -254,10 +249,6 @@ xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
 <emphasis>DEPRECATED</emphasis> as of PHP 5.3.0. Relying on this feature
 is highly discouraged.</simpara></warning>'>
 
-<!ENTITY warn.deprecated.feature-5-3-0.removed-5-4-0 '<warning
-xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
-<emphasis>DEPRECATED</emphasis> as of PHP 5.3.0 and <emphasis>REMOVED</emphasis>
-as of PHP 5.4.0.</simpara></warning>'>
 
 <!ENTITY warn.deprecated.function-5-3-0.removed-5-4-0 '<warning
 xmlns="http://docbook.org/ns/docbook"><simpara>This function has been
@@ -300,10 +291,6 @@ xmlns="http://docbook.org/ns/docbook"><simpara>This function has been
 <emphasis>REMOVED</emphasis> as of PHP 7.2.0. Relying on this function
 is highly discouraged.</simpara></warning>'>
 
-<!ENTITY warn.deprecated.feature-7-2-0 '<warning
-xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
-<emphasis>DEPRECATED</emphasis> as of PHP 7.2.0. Relying on this feature
-is highly discouraged.</simpara></warning>'>
 
 <!ENTITY warn.deprecated.feature-7-2-0.removed-8-0-0 '<warning
 xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
@@ -340,10 +327,6 @@ xmlns="http://docbook.org/ns/docbook"><simpara>This feature has been
 <emphasis>DEPRECATED</emphasis> as of PHP 7.4.0. Relying on this feature
 is highly discouraged.</simpara></warning>'>
 
-<!ENTITY warn.deprecated.function-7-4-0 '<warning
-xmlns="http://docbook.org/ns/docbook"><simpara>This function has been
-<emphasis>DEPRECATED</emphasis> as of PHP 7.4.0. Relying on this function
-is highly discouraged.</simpara></warning>'>
 
 <!ENTITY warn.deprecated.function-7-4-0.removed-8-0-0 '<warning
 xmlns="http://docbook.org/ns/docbook"><simpara>This function has been
@@ -447,8 +430,6 @@ xmlns="http://docbook.org/ns/docbook"><simpara>This function was
 xmlns="http://docbook.org/ns/docbook"><simpara>This function was
 <emphasis>DEPRECATED</emphasis> in PHP 5.3.0, and <emphasis>REMOVED</emphasis> as of PHP 7.0.0.</simpara></warning>'>
 
-<!ENTITY warn.deprecated.alias-5-3-0.removed-7-0-0 '<warning xmlns="http://docbook.org/ns/docbook"><simpara>This alias was
-<emphasis>DEPRECATED</emphasis> in PHP 5.3.0, and <emphasis>REMOVED</emphasis> as of PHP 7.0.0.</simpara></warning>'>
 
 <!ENTITY warn.deprecated.feature-5-6-0.removed-7-0-0 '<warning
 xmlns="http://docbook.org/ns/docbook"><simpara>This feature was
@@ -636,9 +617,7 @@ is highly discouraged.</simpara></warning>
 
 <!ENTITY example.outputs.5 '<simpara xmlns="http://docbook.org/ns/docbook">Output of the above example in PHP 5:</simpara>'>
 
-<!ENTITY example.outputs.53 '<simpara xmlns="http://docbook.org/ns/docbook">Output of the above example in PHP 5.3:</simpara>'>
 
-<!ENTITY example.outputs.54 '<simpara xmlns="http://docbook.org/ns/docbook">Output of the above example in PHP 5.4:</simpara>'>
 
 <!ENTITY example.outputs.55 '<simpara xmlns="http://docbook.org/ns/docbook">Output of the above example in PHP 5.5:</simpara>'>
 
@@ -1647,9 +1626,6 @@ It is strongly recommended to avoid timezone abbreviations.
 Every call to a date/time function will generate a <constant>E_WARNING</constant>
 if the time zone is not valid. See also <function>date_default_timezone_set</function></simpara>'>
 
-<!ENTITY date.timezone.errors.changelog '<row xmlns="http://docbook.org/ns/docbook"><entry>5.1.0</entry><entry><simpara>
-Now issues the <constant>E_STRICT</constant> and <constant>E_NOTICE</constant>
-time zone errors.</simpara></entry></row>'>
 
 <!ENTITY date.timestamp.description '
 <varlistentry xmlns="http://docbook.org/ns/docbook"><term><parameter>timestamp</parameter></term><listitem><simpara>
@@ -2177,8 +2153,6 @@ or <link linkend="functions.named-arguments">named arguments</link>.</simpara>
 
 <!-- Common pieces in partintro-sections -->
 <!ENTITY no.config '<simpara xmlns="http://docbook.org/ns/docbook">This extension has no configuration directives defined in &php.ini;.</simpara>'>
-<!ENTITY no.resource '<simpara xmlns="http://docbook.org/ns/docbook">This extension has no resource types defined.</simpara>'>
-<!ENTITY no.constants '<simpara xmlns="http://docbook.org/ns/docbook">This extension has no constants defined.</simpara>'>
 <!ENTITY no.requirement '<simpara xmlns="http://docbook.org/ns/docbook">No external libraries are needed to build this extension.</simpara>'>
 <!ENTITY no.install '<simpara xmlns="http://docbook.org/ns/docbook">There is no installation needed to use these
 functions; they are part of the PHP core.</simpara>'>