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><H1
><A
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>yaz_connect</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN247595"
></A
><P
> (PHP 4 >= 4.0.1, PECL)</P
>yaz_connect --
Prepares for a connection to a Z39.50 server
</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN247598"
></A
><H2
>说明</H2
>mixed <B
CLASS="methodname"
>yaz_connect</B
> ( string zurl [, mixed options] )<BR
></BR
><P
> This function returns a connection resource on success, zero on
failure.
</P
><P
> <B
CLASS="function"
>yaz_connect()</B
> prepares for a connection to a
Z39.50 server.
This function is non-blocking and does not attempt to establish
a connection - it merely prepares a connect to be performed later when
<A
HREF="function.yaz-wait.html"
><B
CLASS="function"
>yaz_wait()</B
></A
> is called.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
The <A
HREF="http://www.indexdata.dk/yazproxy/"
TARGET="_top"
>YAZ proxy</A
> is a
freely available Z39.50 proxy.
</P
></BLOCKQUOTE
></DIV
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN247616"
></A
><H2
>参数</H2
><P
> <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>zurl</CODE
></DT
><DD
><P
> A string that takes the form <TT
CLASS="literal"
>host[:port][/database]</TT
>.
If port is omitted, port 210 is used. If database is omitted
<TT
CLASS="literal"
>Default</TT
> is used.
</P
></DD
><DT
><CODE
CLASS="parameter"
>options</CODE
></DT
><DD
><P
> If given as a string, it is treated as the Z39.50 V2 authentication
string (OpenAuth).
</P
><P
> If given as an array, the contents of the array serves as options.
<P
></P
><DIV
CLASS="variablelist"
><DL
><DT
>user</DT
><DD
><P
> Username for authentication.
</P
></DD
><DT
>group</DT
><DD
><P
> Group for authentication.
</P
></DD
><DT
>password</DT
><DD
><P
> Password for authentication.
</P
></DD
><DT
>cookie</DT
><DD
><P
> Cookie for session (YAZ proxy).
</P
></DD
><DT
>proxy</DT
><DD
><P
> Proxy for connection (YAZ proxy).
</P
></DD
><DT
>persistent</DT
><DD
><P
> A boolean. If <TT
CLASS="constant"
><B
>TRUE</B
></TT
> the connection is persistent; If <TT
CLASS="constant"
><B
>FALSE</B
></TT
> the
connection is not persistent. By default connections are persistent.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
If you open a persistent connection, you won't be able to close
it later with <A
HREF="function.yaz-close.html"
><B
CLASS="function"
>yaz_close()</B
></A
>.
</P
></BLOCKQUOTE
></DIV
></DD
><DT
>piggyback</DT
><DD
><P
> A boolean. If <TT
CLASS="constant"
><B
>TRUE</B
></TT
> piggyback is enabled for searches; If <TT
CLASS="constant"
><B
>FALSE</B
></TT
>
piggyback is disabled. By default piggyback is enabled.
</P
><P
> Enabling piggyback is more efficient and usually saves a
network-round-trip for first time fetches of records. However, a
few Z39.50 servers do not support piggyback or they ignore element
set names. For those, piggyback should be disabled.
</P
></DD
><DT
>charset</DT
><DD
><P
> A string that specifies character set to be used in Z39.50
language and character set negotiation. Use strings such as:
<TT
CLASS="literal"
>ISO-8859-1</TT
>, <TT
CLASS="literal"
>UTF-8</TT
>,
<TT
CLASS="literal"
>UTF-16</TT
>.
</P
><P
> Most Z39.50 servers do not support this feature (and thus, this is
ignored). Many servers use the ISO-8859-1 encoding for queries and
messages. MARC21/USMARC records are not affected by this setting.
</P
></DD
><DT
>preferredMessageSize</DT
><DD
><P
> An integer that specifies the maximum byte size of all records
to be returned by a target during retrieval. See the
<A
HREF="http://www.loc.gov/z3950/agency/markup/04.html#3.2.1.1.4"
TARGET="_top"
>Z39.50 standard</A
> for more
information.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
This option is supported in PECL YAZ 1.0.5 or later.
</P
></BLOCKQUOTE
></DIV
></DD
><DT
>maximumRecordSize</DT
><DD
><P
> An integer that specifies the maximum byte size of a single record
to be returned by a target during retrieval. This
entity is referred to as Exceptional-record-size in the
<A
HREF="http://www.loc.gov/z3950/agency/markup/04.html#3.2.1.1.4"
TARGET="_top"
>Z39.50 standard</A
>.
</P
><DIV
CLASS="note"
><BLOCKQUOTE
CLASS="note"
><P
><B
>注意: </B
>
This option is supported in PECL YAZ 1.0.5 or later.
</P
></BLOCKQUOTE
></DIV
></DD
></DL
></DIV
>
</P
></DD
></DL
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN247692"
></A
><H2
>返回值</H2
><P
> A connection resource on success, <TT
CLASS="constant"
><B
>FALSE</B
></TT
> on error.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN247696"
></A
><H2
>更新日志</H2
><P
> <DIV
CLASS="informaltable"
><P
></P
><A
NAME="AEN247699"
></A
><TABLE
BORDER="1"
CLASS="CALSTABLE"
><COL><COL><THEAD
><TR
><TH
>版本</TH
><TH
>说明</TH
></TR
></THEAD
><TBODY
><TR
><TD
>4.1.0</TD
><TD
> The parameter <CODE
CLASS="parameter"
>options</CODE
> was added.
</TD
></TR
></TBODY
></TABLE
><P
></P
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN247710"
></A
><H2
>参见</H2
><P
> <P
></P
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><B
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></P
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