<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.bcscale" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>bcscale</refname>
  <refpurpose>Set or get default scale parameter for all bc math functions</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>bcscale</methodname>
   <methodparam><type>int</type><parameter>scale</parameter></methodparam>
  </methodsynopsis>
  <para>
   Sets the default scale parameter for all subsequent calls to bc math functions that
   do not explicitly specify a scale parameter.
  </para>
  <methodsynopsis>
   <type>int</type><methodname>bcscale</methodname>
   <methodparam choice="opt"><type>null</type><parameter>scale</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   Gets the current scale factor.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>scale</parameter></term>
     <listitem>
      <para>
       The scale factor.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the old scale when used as setter. Otherwise the current scale is returned.
  </para>
 </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>
       <parameter>scale</parameter> is now nullable.
      </entry>
     </row>
     <row>
      <entry>7.3.0</entry>
      <entry>
       <function>bcscale</function> can now be used to get the current scale
       factor; when used as setter, it now returns the old scale value.
       Formerly, <parameter>scale</parameter> was mandatory, and
       <function>bcscale</function> always returned &true;.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>bcscale</function> example</title>
    <programlisting role="php">
<![CDATA[
<?php

// default scale : 3
bcscale(3);
echo bcdiv('105', '6.55957'); // 16.007

// this is the same without bcscale()
echo bcdiv('105', '6.55957', 3); // 16.007

?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>
</refentry>
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