doc-en/reference/reflection/reflectionfunction/construct.xml at master · php/doc-en · GitHub

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<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="reflectionfunction.construct" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>ReflectionFunction::__construct</refname>
  <refpurpose>Constructs a ReflectionFunction object</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <constructorsynopsis role="ReflectionFunction">
   <modifier>public</modifier> <methodname>ReflectionFunction::__construct</methodname>
   <methodparam><type class="union"><type>Closure</type><type>string</type></type><parameter>function</parameter></methodparam>
  </constructorsynopsis>
  <para>
   Constructs a <classname>ReflectionFunction</classname> object.
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>function</parameter></term>
     <listitem>
      <para>
       The name of the function to reflect or a <link linkend="functions.anonymous">closure</link>.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="errors">
  &reftitle.errors;
  <para>
   A <classname>ReflectionException</classname> if the <parameter>function</parameter>
   parameter does not contain a valid function.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><methodname>ReflectionFunction::__construct</methodname> example</title>
    <programlisting role="php">
<![CDATA[
<?php
/**
 * A simple counter
 *
 * @return    int
 */
function counter1()
{
    static $c = 0;
    return ++$c;
}

/**
 * Another simple counter
 *
 * @return    int
 */
$counter2 = function()
{
    static $d = 0;
    return ++$d;

};

function dumpReflectionFunction($func)
{
    // Print out basic information
    printf(
        "\n\n===> The %s function '%s'\n".
        "     declared in %s\n".
        "     lines %d to %d\n",
        $func->isInternal() ? 'internal' : 'user-defined',
        $func->getName(),
        $func->getFileName(),
        $func->getStartLine(),
        $func->getEndline()
    );

    // Print documentation comment
    printf("---> Documentation:\n %s\n", var_export($func->getDocComment(), true));

    // Print static variables if existent
    if ($statics = $func->getStaticVariables())
    {
        printf("---> Static variables: %s\n", var_export($statics, true));
    }
}

// Create an instance of the ReflectionFunction class
dumpReflectionFunction(new ReflectionFunction('counter1'));
dumpReflectionFunction(new ReflectionFunction($counter2));
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
===> The user-defined function 'counter1'
     declared in Z:\reflectcounter.php
     lines 7 to 11
---> Documentation:
 '/**
 * A simple counter
 *
 * @return    int
 */'
---> Static variables: array (
  'c' => 0,
)


===> The user-defined function '{closure}'
     declared in Z:\reflectcounter.php
     lines 18 to 23
---> Documentation:
 '/**
 * Another simple counter
 *
 * @return    int
 */'
---> Static variables: array (
  'd' => 0,
)
]]>
    </screen>
   </example>
  </para>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><methodname>ReflectionMethod::__construct</methodname></member>
    <member><link linkend="language.oop5.decon.constructor">Constructors</link></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>
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