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<refentry xml:id="function.spl-autoload" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>spl_autoload</refname>
  <refpurpose>Default implementation for __autoload()</refpurpose>
 </refnamediv>
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>void</type><methodname>spl_autoload</methodname>
   <methodparam><type>string</type><parameter>class</parameter></methodparam>
   <methodparam choice="opt"><type class="union"><type>string</type><type>null</type></type><parameter>file_extensions</parameter><initializer>&null;</initializer></methodparam>
  </methodsynopsis>
  <para>
   This function is intended to be used as a default implementation for
   <function>__autoload</function>. If nothing else is specified and
   <function>spl_autoload_register</function> is
   called without any parameters then this function will be used for any
   later call to <function>__autoload</function>. 
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>class</parameter></term>
     <listitem>
      <para>
       The name of the class (and namespace) being instantiated.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>file_extensions</parameter></term>
     <listitem>
      <para>
       By default it checks all include paths to
       contain filenames built up by the lowercase class name appended by the
       filename extensions .inc and .php.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   &return.void;
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <para>
   Throws <classname>LogicException</classname> when the class is not found
   and there are no other autoloaders registered.
  </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>8.0.0</entry>
       <entry>
        <parameter>file_extensions</parameter> is now nullable.
       </entry>
      </row>
     </tbody>
    </tgroup>
   </informaltable>
  </para>
 </refsect1>
 
</refentry>
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