wordwrap() Add errors/changelog sections, specify U+0020 instead U+20 (#3817)

---------

Co-authored-by: Gina Peter Banyard <girgias@php.net>

reference/strings/functions/wordwrap.xml

@@ -18,7 +18,7 @@
   <para>
    Wraps a string to a given number of characters using a string break
    character.
-   Strings wrap after a space (U+20) character unless <parameter>cut_long_words</parameter>
+   Strings wrap after a space (U+0020) character unless <parameter>cut_long_words</parameter>
    is set to &true;.
   </para>
  </refsect1>
@@ -47,8 +47,8 @@
      <term><parameter>break</parameter></term>
      <listitem>
       <para>
-       The line is broken using the optional
-       <parameter>break</parameter> parameter.
+       The line is broken using the optional <parameter>break</parameter> parameter.
+       It must not be an empty string.
       </para>
      </listitem>
     </varlistentry>
@@ -75,6 +75,38 @@
   </para>
  </refsect1>
 
+ <refsect1 role="errors">
+  &reftitle.errors;
+  <simpara>
+   If <parameter>break</parameter> is an empty string,
+   a <classname>ValueError</classname> is thrown.
+  </simpara>
+ </refsect1>
+
+ <refsect1 role="changelog">
+  &reftitle.changelog;
+  <informaltable>
+   <tgroup cols="2">
+    <thead>
+     <row>
+      <entry>&Version;</entry>
+      <entry>&Description;</entry>
+     </row>
+    </thead>
+    <tbody>
+     <row>
+      <entry>8.0.0</entry>
+      <entry>
+       If <parameter>break</parameter> is empty string,
+       a <classname>ValueError</classname> is thrown;
+       previously in this case it emitted an <constant>E_WARNING</constant> and returned &false;.
+      </entry>
+     </row>
+    </tbody>
+   </tgroup>
+  </informaltable>
+ </refsect1>
+
  <refsect1 role="examples">
   &reftitle.examples;
   <para>