php-doc-en/reference/calendar/functions/jddayofweek.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.jddayofweek" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>jddayofweek</refname>
  <refpurpose>Returns the day of the week</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>mixed</type><methodname>jddayofweek</methodname>
   <methodparam><type>int</type><parameter>julianday</parameter></methodparam>
   <methodparam choice="opt"><type>int</type><parameter>mode</parameter><initializer>CAL_DOW_DAYNO</initializer></methodparam>
  </methodsynopsis>
  <para>
   Returns the day of the week.  Can return a string or an integer
   depending on the mode.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>julianday</parameter></term>
     <listitem>
      <para>
       A julian day number as integer
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>mode</parameter></term>
     <listitem>
      <table>
       <title>Calendar week modes</title>
       <tgroup cols="2">
        <thead>
         <row>
          <entry>Mode</entry>
          <entry>Meaning</entry>
         </row>
        </thead>
        <tbody>
         <row>
          <entry>0 (Default)</entry> 
          <entry>
           Return the day number as an int (0=Sunday, 1=Monday, etc)
          </entry>
         </row>
         <row>
          <entry>1</entry> 
          <entry>
           Returns string containing the day of week
           (English-Gregorian)
          </entry>
         </row>
         <row>
          <entry>2</entry> 
          <entry>
           Return a string containing the abbreviated day of week
           (English-Gregorian)
          </entry>
         </row>
        </tbody>
       </tgroup>
      </table>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   The gregorian weekday as either an integer or string.
  </para>
 </refsect1>
</refentry>

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