diff --git a/reference/json/constants.xml b/reference/json/constants.xml
index c05f96c032..ae7f83a924 100644
--- a/reference/json/constants.xml
+++ b/reference/json/constants.xml
@@ -76,8 +76,8 @@
    </term>
    <listitem>
     <simpara>
-     Malformed UTF-8 characters, possibly incorrectly encoded. This 
-     constant is available as of PHP 5.3.3.
+     Malformed UTF-8 characters, possibly incorrectly encoded.
+     Available since PHP 5.3.3.
     </simpara>
    </listitem>
   </varlistentry>
@@ -87,15 +87,13 @@
      (<type>integer</type>)
    </term>
    <listitem>
-    <para>
+    <simpara>
      The object or array passed to <function>json_encode</function> include
      recursive references and cannot be encoded.
      If the <constant>JSON_PARTIAL_OUTPUT_ON_ERROR</constant> option was
      given, &null; will be encoded in the place of the recursive reference.
-    </para>
-    <para>
-     This constant is available as of PHP 5.5.0.
-    </para>
+     Available since PHP 5.5.0.
+    </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.json-error-inf-or-nan">
@@ -104,17 +102,15 @@
      (<type>integer</type>)
    </term>
    <listitem>
-    <para>
+    <simpara>
      The value passed to <function>json_encode</function> includes either
      <link linkend="language.types.float.nan"><constant>NAN</constant></link>
      or <link linkend="function.is-infinite"><constant>INF</constant></link>.
      If the <constant>JSON_PARTIAL_OUTPUT_ON_ERROR</constant> option was
      given, <literal>0</literal> will be encoded in the place of these
      special numbers.
-    </para>
-    <para>
-     This constant is available as of PHP 5.5.0.
-    </para>
+     Available since PHP 5.5.0.
+    </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.json-error-unsupported-type">
@@ -123,43 +119,73 @@
      (<type>integer</type>)
    </term>
    <listitem>
-    <para>
+    <simpara>
      A value of an unsupported type was given to
      <function>json_encode</function>, such as a <type>resource</type>.
      If the <constant>JSON_PARTIAL_OUTPUT_ON_ERROR</constant> option was
      given, &null; will be encoded in the place of the unsupported value.
-    </para>
-    <para>
-     This constant is available as of PHP 5.5.0.
-    </para>
+     Available since PHP 5.5.0.
+    </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.json-error-invalid-property-name">
    <term>
     <constant>JSON_ERROR_INVALID_PROPERTY_NAME</constant>
-     (<type>integer</type>)
+    (<type>integer</type>)
    </term>
    <listitem>
-    <para>
-     An invalid property name was given to <function>json_decode</function>.
-    </para>
-    <para>
-     This constant is available as of PHP 7.0.0.
-    </para>
+    <simpara>
+     A key starting with \u0000 character was in the string passed to
+     <function>json_decode</function> when decoding a JSON object into a PHP
+     object.
+     Available since PHP 7.0.0.
+    </simpara>
    </listitem>
   </varlistentry>
   <varlistentry xml:id="constant.json-error-utf16">
    <term>
-    <constant>JSON_ERROR_UTF16</constant>
-     (<type>integer</type>)
+    <constant>JSON_ERROR_INVALID_PROPERTY_NAME</constant>
+    (<type>integer</type>)
    </term>
    <listitem>
-    <para>
-     Invalid UTF-16 was given to <function>json_decode</function>.
-    </para>
-    <para>
-     This constant is available as of PHP 7.0.0.
-    </para>
+    <simpara>
+     Single unpaired UTF-16 surrogate in unicode escape contained in the
+     JSON string passed to <function>json_encode</function>.
+     Available since PHP 7.0.0.
+    </simpara>
+   </listitem>
+  </varlistentry>
+ </variablelist>
+
+ <para>
+  The following constants can be combined to form options for
+  <function>json_decode</function>.
+ </para>
+ <variablelist>
+  <varlistentry xml:id="constant.json-bigint-as-string">
+   <term>
+    <constant>JSON_BIGINT_AS_STRING</constant>
+    (<type>integer</type>)
+   </term>
+   <listitem>
+    <simpara>
+     Decodes large integers as their original string value.
+     Available since PHP 5.4.0.
+    </simpara>
+   </listitem>
+  </varlistentry>
+  <varlistentry xml:id="constant.json-object-as-array">
+   <term>
+    <constant>JSON_OBJECT_AS_ARRAY</constant>
+    (<type>integer</type>)
+   </term>
+   <listitem>
+    <simpara>
+     Decodes JSON objects as PHP array. This option can be added automatically
+     by calling <function>json_decode</function> with the second parameter
+     equal to &true;.
+     Available since PHP 5.4.0.
+    </simpara>
    </listitem>
   </varlistentry>
  </variablelist>
@@ -243,18 +269,6 @@
     </simpara>
    </listitem>
   </varlistentry>
-  <varlistentry xml:id="constant.json-bigint-as-string">
-   <term>
-    <constant>JSON_BIGINT_AS_STRING</constant>
-     (<type>integer</type>)
-   </term>
-   <listitem>
-    <simpara>
-     Encodes large integers as their original string value.
-     Available since PHP 5.4.0.
-    </simpara>
-   </listitem>
-  </varlistentry>
   <varlistentry xml:id="constant.json-pretty-print">
    <term>
     <constant>JSON_PRETTY_PRINT</constant>
@@ -286,7 +300,8 @@
    </term>
    <listitem>
     <simpara>
-     Encode multibyte Unicode characters literally (default is to escape as \uXXXX).
+     Encode multibyte Unicode characters literally (default is to escape as
+     \uXXXX).
      Available since PHP 5.4.0.
     </simpara>
    </listitem>
@@ -303,19 +318,35 @@
     </simpara>
    </listitem>
   </varlistentry>
- <varlistentry xml:id="constant.json-preserve-zero-fraction">
+  <varlistentry xml:id="constant.json-preserve-zero-fraction">
    <term>
     <constant>JSON_PRESERVE_ZERO_FRACTION</constant>
      (<type>integer</type>)
    </term>
    <listitem>
     <simpara>
-     Ensures that <type>float</type> values are always encoded as a float value.
+     Ensures that <type>float</type> values are always encoded as a float
+     value.
      Available since PHP 5.6.6.
     </simpara>
    </listitem>
   </varlistentry>
+  <varlistentry xml:id="constant.json-unescaped-line-terminators">
+   <term>
+    <constant>JSON_UNESCAPED_LINE_TERMINATORS</constant>
+    (<type>integer</type>)
+   </term>
+   <listitem>
+    <simpara>
+     The line terminators are kept unescaped when
+     <constant>JSON_UNESCAPED_UNICODE</constant> is supplied. It uses the same
+     behaviour as it was before PHP 7.1 without this constant.
+     Available since PHP 7.1.0.
+    </simpara>
+   </listitem>
+  </varlistentry>
  </variablelist>
+
 </appendix>
 
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