add quality param

git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@227540 c90b9560-bf6c-de11-be94-00142212c4b1

reference/image/functions/imagepng.xml

@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.8 $ -->
+<!-- $Revision: 1.9 $ -->
 <refentry id="function.imagepng">
  <refnamediv>
   <refname>imagepng</refname>
@@ -11,6 +11,7 @@
    <type>bool</type><methodname>imagepng</methodname>
    <methodparam><type>resource</type><parameter>image</parameter></methodparam>
    <methodparam choice="opt"><type>string</type><parameter>filename</parameter></methodparam>
+   <methodparam choice="opt"><type>int</type><parameter>quality</parameter></methodparam>
   </methodsynopsis>
   <para>
    Outputs or saves a <acronym>PNG</acronym> image from the given 
@@ -31,6 +32,14 @@
       </para>
      </listitem>
     </varlistentry>
+    <varlistentry>
+     <term><parameter>quality</parameter></term>
+     <listitem>
+      <para>
+       Compression level: from 0 (no compression) to 9.
+      </para>
+     </listitem>
+    </varlistentry>
    </variablelist>
   </para>
  </refsect1>
@@ -40,6 +49,31 @@
    &return.success;
   </para>
  </refsect1>
+
+ <refsect1 role="changelog">
+  &reftitle.changelog;
+  <para>
+   <informaltable>
+    <tgroup cols="2">
+     <thead>
+      <row>
+       <entry>&Version;</entry>
+       <entry>&Description;</entry>
+      </row>
+     </thead>
+     <tbody>
+      <row>
+       <entry>5.1.0</entry>
+       <entry>
+        Added the <parameter>quality</parameter> parameter.
+       </entry>
+      </row>
+     </tbody>
+    </tgroup>
+   </informaltable>
+  </para>
+ </refsect1>
+
  <refsect1 role="examples">
   &reftitle.examples;
   <para>