php-doc-en/reference/reflection/reflectionparameter/construct.xml

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

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

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>function</parameter></term>
     <listitem>
      <para>
       The function to reflect parameters from.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>param</parameter></term>
     <listitem>
      <para>
       Either an &integer; specifying the position of the parameter (starting with
       zero), or the parameter name as &string;.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Using the <classname>ReflectionParameter</classname> class</title>
    <programlisting role="php">
<![CDATA[
<?php
function foo($a, $b, $c) { }
function bar(Exception $a, &$b, $c) { }
function baz(ReflectionFunction $a, $b = 1, $c = null) { }
function abc() { }

$reflect = new ReflectionFunction('foo');

echo $reflect;

foreach ($reflect->getParameters() as $i => $param) {
    printf(
        "-- Parameter #%d: %s {\n".
        "   Class: %s\n".
        "   Allows NULL: %s\n".
        "   Passed to by reference: %s\n".
        "   Is optional?: %s\n".
        "}\n",
        $i, // $param->getPosition() can be used
        $param->getName(),
        var_export($param->getClass(), 1),
        var_export($param->allowsNull(), 1),
        var_export($param->isPassedByReference(), 1),
        $param->isOptional() ? 'yes' : 'no'
    );
}
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
Function [ <user> function foo ] {
  @@ /Users/philip/cvs/phpdoc/a 2 - 2

  - Parameters [3] {
    Parameter #0 [ <required> $a ]
    Parameter #1 [ <required> $b ]
    Parameter #2 [ <required> $c ]
  }
}
-- Parameter #0: a {
   Class: NULL
   Allows NULL: true
   Passed to by reference: false
   Is optional?: no
}
-- Parameter #1: b {
   Class: NULL
   Allows NULL: true
   Passed to by reference: false
   Is optional?: no
}
-- Parameter #2: c {
   Class: NULL
   Allows NULL: true
   Passed to by reference: false
   Is optional?: no
}
]]>
    </screen>
   </example>
  </para>
 </refsect1>

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

</refentry>
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