<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >http_cache_last_modified</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="Manual do PHP" HREF="index.html"><LINK REL="UP" TITLE="HTTP" HREF="ref.http.html"><LINK REL="PREVIOUS" TITLE="http_cache_etag" HREF="function.http-cache-etag.html"><LINK REL="NEXT" TITLE="http_chunked_decode" HREF="function.http-chunked-decode.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >Manual do PHP</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.http-cache-etag.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.http-chunked-decode.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.http-cache-last-modified" ></A >http_cache_last_modified</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN69971" ></A ><P > (PECL)</P >http_cache_last_modified -- Caching by last modification</DIV ><DIV CLASS="refsect1" ><A NAME="AEN69974" ></A ><H2 >Descrição</H2 >bool <B CLASS="methodname" >http_cache_last_modified</B > ( [int timestamp_or_expires] )<BR ></BR ><P > Attempts to cache the sent entity by its last modification date. </P ><P > If the supplied argument is greater than 0, it is handled as timestamp and will be sent as date of last modification. If it is 0 or omitted, the current time will be sent as <TT CLASS="literal" >Last-Modified</TT > date. If it's negative, it is handled as expiration time in seconds, which means that if the requested last modification date is not between the calculated timespan, the <TT CLASS="literal" >Last-Modified</TT > header is updated and the actual body will be sent. </P ><P > A log entry will be written to the cache log if the <A HREF="ref.http.html#http.configuration" >Definições INI</A > <A HREF="missing-stuff.html#http.configuration.log.cache" >http.log.cache</A > is set and the cache attempt was successful. </P ><DIV CLASS="note" ><BLOCKQUOTE CLASS="note" ><P ><B >Nota: </B >This function may be used in conjunction with <A HREF="function.http-send-data.html" ><B CLASS="function" >http_send_data()</B ></A >, <A HREF="function.http-send-file.html" ><B CLASS="function" >http_send_file()</B ></A > e <A HREF="function.http-send-stream.html" ><B CLASS="function" >http_send_stream()</B ></A >.</P ></BLOCKQUOTE ></DIV ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN69994" ></A ><H2 >Parâmetros</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >timestamp_or_expires</CODE ></DT ><DD ><P > Unix timestamp </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN70003" ></A ><H2 >Valores de retornado</H2 ><P > Returns <TT CLASS="constant" ><B >FALSE</B ></TT > or <SPAN CLASS="emphasis" ><I CLASS="emphasis" >exits</I ></SPAN > on success with <TT CLASS="literal" >304 Not Modified</TT > if the entity is cached. See the <A HREF="ref.http.html#http.configuration" >Definições INI</A > <A HREF="missing-stuff.html#http.configuration.force_exit" >http.force_exit</A > for what "exits" means. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN70011" ></A ><H2 >Exemplos</H2 ><P > <TABLE WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" CLASS="EXAMPLE" ><TR ><TD ><DIV CLASS="example" ><A NAME="AEN70014" ></A ><P ><B >Exemplo 1. A <B CLASS="function" >http_cache_last_modified()</B > example</B ></P ><P > Caching for 5 seconds. </P ><TABLE BORDER="0" BGCOLOR="#E0E0E0" CELLPADDING="5" ><TR ><TD ><code><font color="#000000"> <font color="#0000BB"><?php<br />http_cache_last_modified</font><font color="#007700">(-</font><font color="#0000BB">5</font><font color="#007700">);<br /></font><font color="#0000BB">printf</font><font color="#007700">(</font><font color="#DD0000">"%s\n"</font><font color="#007700">, </font><font color="#0000BB">http_date</font><font color="#007700">());<br /></font><font color="#0000BB">?></font> </font> </code></TD ></TR ></TABLE ></DIV ></TD ></TR ></TABLE > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN70019" ></A ><H2 >Veja também</H2 ><P > <P ></P ><TABLE BORDER="0" ><TBODY ><TR ><TD ><A HREF="function.http-cache-etag.html" ><B CLASS="function" >http_cache_etag()</B ></A ></TD ></TR ><TR ><TD >the <A HREF="missing-stuff.html#http.HttpResponse" ><B CLASS="classname" >HttpResponse</B ></A > class if you are using PHP-5.1 and above</TD ></TR ></TBODY ></TABLE ><P ></P > </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.http-cache-etag.html" ACCESSKEY="P" >Anterior</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >Principal</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.http-chunked-decode.html" ACCESSKEY="N" >Próxima</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >http_cache_etag</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.http.html" ACCESSKEY="U" >Acima</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >http_chunked_decode</TD ></TR ></TABLE ></DIV ></BODY ></HTML >