php-doc-en/reference/eio/functions/eio-link.xml

<?xml version="1.0" encoding="utf-8"?>
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<refentry xml:id="function.eio-link" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
 <refnamediv>
  <refname>eio_link</refname>
  <refpurpose>Create a hardlink for file</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>resource</type><methodname>eio_link</methodname>
   <methodparam><type>string</type><parameter>path</parameter></methodparam>
   <methodparam><type>string</type><parameter>new_path</parameter></methodparam>
   <methodparam
   choice="opt"><type>int</type><parameter>pri</parameter><initializer>EIO_PRI_DEFAULT</initializer></methodparam>
   <methodparam
   choice="opt"><type>callable</type><parameter>callback</parameter><initializer>NULL</initializer></methodparam>
   <methodparam
   choice="opt"><type>mixed</type><parameter>data</parameter><initializer>NULL</initializer></methodparam>
  </methodsynopsis>
  <para>
  <function>eio_link</function> creates a hardlink
  <parameter>new_path</parameter> for a file specified by
  <parameter>path</parameter>.
  </para>

 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <variablelist>
   <varlistentry>
    <term><parameter>path</parameter></term>
    <listitem>
     <para>
     Source file path.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>new_path</parameter></term>
    <listitem>
     <para>
     Target file path.
     </para>
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>pri</parameter></term>
    <listitem>
     &eio.request.pri.values;
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>callback</parameter></term>
    <listitem>
     &eio.callback.proto;
    </listitem>
   </varlistentry>
   <varlistentry>
    <term><parameter>data</parameter></term>
    <listitem>
     <para>
     Arbitrary variable passed to <parameter>callback</parameter>.
     </para>
    </listitem>
   </varlistentry>
  </variablelist>
 </refsect1>

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

  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <example>
   <title><function>eio_link</function> example</title>
   <programlisting role="php">
<![CDATA[
<?php
$filename = dirname(__FILE__)."/symlink.dat";
touch($filename);
$link = dirname(__FILE__)."/symlink.link";
$hardlink = dirname(__FILE__)."/hardlink.link";

function my_hardlink_cb($data, $result) {
    global $link, $filename;
    var_dump(file_exists($data) && !is_link($data));
    @unlink($data);

    eio_symlink($filename, $link, EIO_PRI_DEFAULT, "my_symlink_cb", $link);
}

function my_symlink_cb($data, $result) {
    global $link, $filename;
    var_dump(file_exists($data) && is_link($data));

    if (!eio_readlink($data, EIO_PRI_DEFAULT, "my_readlink_cb", NULL)) {
        @unlink($link);
        @unlink($filename);
    }
}

function my_readlink_cb($data, $result) {
    global $filename, $link;
    var_dump($result);

    @unlink($link);
    @unlink($filename);
}

eio_link($filename, $hardlink, EIO_PRI_DEFAULT, "my_hardlink_cb", $hardlink);
eio_event_loop();
?>
]]>
   </programlisting>
   &example.outputs.similar;
   <screen>
<![CDATA[
bool(true)
bool(true)
string(%d) "%ssymlink.dat"
]]>
   </screen>
  </example>
 </refsect1>


 <refsect1 role="seealso">
  &reftitle.seealso;
  <simplelist>
   <member>eio_symlink</member>
  </simplelist>
 </refsect1>

</refentry>

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