function.dns-get-record.html

php的帮助文档,涉及到PHP的案例和基本语法,以及实际应用内容

        <i>refresh</i>: Refresh interval (seconds) secondary name
        servers should use when updating remote copies of this domain.
        <i>retry</i>: Length of time (seconds) to wait after a
        failed refresh before making a second attempt.
        <i>expire</i>: Maximum length of time (seconds) a secondary
        DNS server should retain remote copies of the zone data without a
        successful refresh before discarding.
        <i>minimum-ttl</i>: Minimum length of time (seconds) a
        client can continue to use a DNS resolution before it should request
        a new resolution from the server.  Can be overridden by individual
        resource records.
       </td>
      </tr>

      <tr valign="middle">
       <td colspan="1" rowspan="1" align="left"><i>AAAA</i></td>
       <td colspan="1" rowspan="1" align="left">
        <i>ipv6</i>: IPv6 address
       </td>
      </tr>

      <tr valign="middle">
       <td colspan="1" rowspan="1" align="left"><i>A6</i>(PHP &gt;= 5.1.0)</td>
       <td colspan="1" rowspan="1" align="left">
        <i>masklen</i>: Length (in bits) to inherit from the target
        specified by <i><tt class="parameter">chain</tt></i>
.
        <i>ipv6</i>: Address for this specific record to merge with
        <i><tt class="parameter">chain</tt></i>
.
        <i>chain</i>: Parent record to merge with
        <i><tt class="parameter">ipv6</tt></i>
 data.
       </td>
      </tr>

      <tr valign="middle">
       <td colspan="1" rowspan="1" align="left"><i>SRV</i></td>
       <td colspan="1" rowspan="1" align="left">
        <i>pri</i>: (Priority) lowest priorities should be used first.
        <i>weight</i>: Ranking to weight which of commonly prioritized
        <i><tt class="parameter">targets</tt></i>
 should be chosen at random.
        <i>target</i> and <i>port</i>: hostname and port
        where the requested service can be found.
        For additional information see: <a href="http://www.faqs.org/rfcs/rfc2782" class="link external">&raquo; RFC 2782</a>
       </td>
      </tr>

      <tr valign="middle">
       <td colspan="1" rowspan="1" align="left"><i>NAPTR</i></td>
       <td colspan="1" rowspan="1" align="left">
        <i>order</i> and <i>pref</i>: Equivalent to
        <i><tt class="parameter">pri</tt></i>
 and <i><tt class="parameter">weight</tt></i>
 above.
        <i>flags</i>, <i>services</i>, <i>regex</i>,
        and <i>replacement</i>: Parameters as defined by
        <a href="http://www.faqs.org/rfcs/rfc2915" class="link external">&raquo; RFC 2915</a>.
       </td>
      </tr>

     </tbody>
    </colgroup>

   </table>

  </p>
 </div>


 <div class="refsect1 examples">
  <h3 class="title">Examples</h3>
  <p class="para">
   <div class="example">
    <p><b>Example #1 Using <b>dns_get_record()</b></b></p>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br />$result&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">dns_get_record</span><span style="color: #007700">(</span><span style="color: #DD0000">"php.net"</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>The above example will output 
something similar to:</p></div>
    <div class="example-contents"><pre>
<div class="cdata"><pre>
Array
(
    [0] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; MX
            [pri] =&gt; 5
            [target] =&gt; pair2.php.net
            [class] =&gt; IN
            [ttl] =&gt; 6765
        )

    [1] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; A
            [ip] =&gt; 64.246.30.37
            [class] =&gt; IN
            [ttl] =&gt; 8125
        )

)
</pre></div>
    </pre></div>
   </div>
   <div class="example">
    <p><b>Example #2 Using <b>dns_get_record()</b> and DNS_ANY</b></p>
    <div class="example-contents"><p>
     Since it&#039;s very common to want the IP address of a mail server
     once the MX record has been resolved, <b>dns_get_record()</b>
     also returns an array in <i><tt class="parameter">addtl</tt></i>
 which
     contains associate records.  <i><tt class="parameter">authns</tt></i>

     is returned as well containing a list of authoritative name
     servers.
    </p></div>
    <div class="example-contents">
<div class="phpcode"><code><span style="color: #000000">
<span style="color: #0000BB">&lt;?php<br /></span><span style="color: #FF8000">/*&nbsp;Request&nbsp;"ANY"&nbsp;record&nbsp;for&nbsp;php.net,<br />&nbsp;&nbsp;&nbsp;and&nbsp;create&nbsp;$authns&nbsp;and&nbsp;$addtl&nbsp;arrays<br />&nbsp;&nbsp;&nbsp;containing&nbsp;list&nbsp;of&nbsp;name&nbsp;servers&nbsp;and<br />&nbsp;&nbsp;&nbsp;any&nbsp;additional&nbsp;records&nbsp;which&nbsp;go&nbsp;with<br />&nbsp;&nbsp;&nbsp;them&nbsp;*/<br /></span><span style="color: #0000BB">$result&nbsp;</span><span style="color: #007700">=&nbsp;</span><span style="color: #0000BB">dns_get_record</span><span style="color: #007700">(</span><span style="color: #DD0000">"php.net"</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">DNS_ANY</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$authns</span><span style="color: #007700">,&nbsp;</span><span style="color: #0000BB">$addtl</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #DD0000">"Result&nbsp;=&nbsp;"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #DD0000">"Auth&nbsp;NS&nbsp;=&nbsp;"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$authns</span><span style="color: #007700">);<br />echo&nbsp;</span><span style="color: #DD0000">"Additional&nbsp;=&nbsp;"</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">print_r</span><span style="color: #007700">(</span><span style="color: #0000BB">$addtl</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?&gt;</span>
</span>
</code></div>
    </div>

    <div class="example-contents"><p>The above example will output 
something similar to:</p></div>
    <div class="example-contents"><pre>
<div class="cdata"><pre>
Result = Array
(
    [0] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; MX
            [pri] =&gt; 5
            [target] =&gt; pair2.php.net
            [class] =&gt; IN
            [ttl] =&gt; 6765
        )

    [1] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; A
            [ip] =&gt; 64.246.30.37
            [class] =&gt; IN
            [ttl] =&gt; 8125
        )

)
Auth NS = Array
(
    [0] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; NS
            [target] =&gt; remote1.easydns.com
            [class] =&gt; IN
            [ttl] =&gt; 10722
        )

    [1] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; NS
            [target] =&gt; remote2.easydns.com
            [class] =&gt; IN
            [ttl] =&gt; 10722
        )

    [2] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; NS
            [target] =&gt; ns1.easydns.com
            [class] =&gt; IN
            [ttl] =&gt; 10722
        )

    [3] =&gt; Array
        (
            [host] =&gt; php.net
            [type] =&gt; NS
            [target] =&gt; ns2.easydns.com
            [class] =&gt; IN
            [ttl] =&gt; 10722
        )

)
Additional = Array
(
    [0] =&gt; Array
        (
            [host] =&gt; pair2.php.net
            [type] =&gt; A
            [ip] =&gt; 216.92.131.5
            [class] =&gt; IN
            [ttl] =&gt; 6766
        )

    [1] =&gt; Array
        (
            [host] =&gt; remote1.easydns.com
            [type] =&gt; A
            [ip] =&gt; 64.39.29.212
            [class] =&gt; IN
            [ttl] =&gt; 100384
        )

    [2] =&gt; Array
        (
            [host] =&gt; remote2.easydns.com
            [type] =&gt; A
            [ip] =&gt; 212.100.224.80
            [class] =&gt; IN
            [ttl] =&gt; 81241
        )

    [3] =&gt; Array
        (
            [host] =&gt; ns1.easydns.com
            [type] =&gt; A
            [ip] =&gt; 216.220.40.243
            [class] =&gt; IN
            [ttl] =&gt; 81241
        )

    [4] =&gt; Array
        (
            [host] =&gt; ns2.easydns.com
            [type] =&gt; A
            [ip] =&gt; 216.220.40.244
            [class] =&gt; IN
            [ttl] =&gt; 81241
        )

)
</pre></div>
    </pre></div>
   </div>
  </p>
 </div>


 <div class="refsect1 notes">
  <h3 class="title">Notes</h3>
  <blockquote><p><b class="note">Note</b>: 
   
    This function is not implemented on Windows platforms, nor does it
    (currently) work on *BSD systems (including Mac). Try the
    <a href="http://pear.php.net/" class="link external">&raquo; PEAR</a> class
    <a href="http://pear.php.net/package/Net_DNS" class="link external">&raquo; Net_DNS</a>.
   <br />
  </p></blockquote>
 </div>


 <div class="refsect1 seealso">
  <h3 class="title">See Also</h3>
  <p class="para">
   <ul class="simplelist">
    <li class="member"><a href="function.dns-get-mx.html" class="function" rel="rdfs-seeAlso">dns_get_mx()</a></li>
    <li class="member"><a href="function.dns-check-record.html" class="function" rel="rdfs-seeAlso">dns_check_record()</a></li>
   </ul>
  </p>
 </div>


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