php-doc-en/reference/bc/functions/bcmod.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.bcmod" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>bcmod</refname>
  <refpurpose>Get modulus of an arbitrary precision number</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>string</type><methodname>bcmod</methodname>
   <methodparam><type>string</type><parameter>dividend</parameter></methodparam>
   <methodparam><type>string</type><parameter>divisor</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>scale</parameter><initializer>0</initializer></methodparam>
  </methodsynopsis>
  <para>
   Get the remainder of dividing <parameter>dividend</parameter> by
   <parameter>divisor</parameter>.
   Unless <parameter>divisor</parameter> is zero, the result has the same sign
   as <parameter>dividend</parameter>.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>dividend</parameter></term>
     <listitem>
      <para>
       The dividend, as a string.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>divisor</parameter></term>
     <listitem>
      <para>
       The divisor, as a string.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the modulus as a string, or &null; if 
   <parameter>divisor</parameter> is <literal>0</literal>.
  </para>
 </refsect1>
 
 <refsect1 role="changelog"><!-- {{{ -->
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     <row>
      <entry>7.2.0</entry>
      <entry>
       <parameter>dividend</parameter> and <parameter>divisor</parameter> are no
       longer truncated to integer, so now the behavior of
       <function>bcmod</function> follows <function>fmod</function> rather than
       the <literal>%</literal> operator.
      </entry>
     </row>
     <row>
      <entry>7.2.0</entry>
      <entry>
       The <parameter>scale</parameter> parameter was added.
      </entry>
     </row>
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1><!-- }}} -->

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title><function>bcmod</function> example</title>
   <programlisting role="php">
<![CDATA[
<?php
bcscale(0);
echo bcmod( '5',  '3'); //  2
echo bcmod( '5', '-3'); //  2
echo bcmod('-5',  '3'); // -2
echo bcmod('-5', '-3'); // -2
?>
]]>
   </programlisting>
  </example>
  <example>
   <title><function>bcmod</function> with decimals</title>
   <programlisting role="php">
<![CDATA[
<?php
bcscale(1);
echo bcmod('5.7', '1.3'); // 0.5 as of PHP 7.2.0; 0 previously
?>
]]>
   </programlisting>
  </example>
 </refsect1>
 
 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>bcdiv</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>

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