mirror of
https://github.com/sigmasternchen/php-doc-en
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git-svn-id: https://svn.php.net/repository/phpdoc/en/trunk@297028 c90b9560-bf6c-de11-be94-00142212c4b1
245 lines
7 KiB
XML
245 lines
7 KiB
XML
<?xml version="1.0" encoding="utf-8"?>
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<!-- $Revision$ -->
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<refentry xml:id="function.yaz-connect" xmlns="http://docbook.org/ns/docbook" xmlns:xlink="http://www.w3.org/1999/xlink">
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<refnamediv>
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<refname>yaz_connect</refname>
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<refpurpose>
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Prepares for a connection to a Z39.50 server
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</refpurpose>
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</refnamediv>
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<refsect1 role="description">
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&reftitle.description;
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<methodsynopsis>
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<type>mixed</type><methodname>yaz_connect</methodname>
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<methodparam><type>string</type><parameter>zurl</parameter></methodparam>
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<methodparam choice="opt"><type>mixed</type><parameter>options</parameter></methodparam>
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</methodsynopsis>
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<para>
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This function returns a connection resource on success, zero on
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failure.
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</para>
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<para>
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<function>yaz_connect</function> prepares for a connection to a
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Z39.50 server.
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This function is non-blocking and does not attempt to establish
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a connection - it merely prepares a connect to be performed later when
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<function>yaz_wait</function> is called.
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</para>
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<note>
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<para>
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The <link xlink:href="&url.yaz-proxy;">YAZ proxy</link> is a
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freely available Z39.50 proxy.
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</para>
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</note>
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</refsect1>
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<refsect1 role="parameters">
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&reftitle.parameters;
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<para>
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<variablelist>
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<varlistentry>
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<term><parameter>zurl</parameter></term>
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<listitem>
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<para>
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A string that takes the form <literal>host[:port][/database]</literal>.
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If port is omitted, port 210 is used. If database is omitted
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<literal>Default</literal> is used.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><parameter>options</parameter></term>
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<listitem>
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<para>
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If given as a string, it is treated as the Z39.50 V2 authentication
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string (OpenAuth).
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</para>
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<para>
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If given as an array, the contents of the array serves as options.
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<variablelist>
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<varlistentry>
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<term>user</term>
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<listitem>
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<para>
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Username for authentication.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>group</term>
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<listitem>
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<para>
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Group for authentication.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>password</term>
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<listitem>
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<para>
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Password for authentication.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>cookie</term>
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<listitem>
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<para>
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Cookie for session (YAZ proxy).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>proxy</term>
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<listitem>
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<para>
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Proxy for connection (YAZ proxy).
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>persistent</term>
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<listitem>
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<para>
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A boolean. If &true; the connection is persistent; If &false; the
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connection is not persistent. By default connections are persistent.
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</para>
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<note>
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<para>
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If you open a persistent connection, you won't be able to close
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it later with <function>yaz_close</function>.
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</para>
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</note>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>piggyback</term>
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<listitem>
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<para>
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A boolean. If &true; piggyback is enabled for searches; If &false;
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piggyback is disabled. By default piggyback is enabled.
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</para>
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<para>
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Enabling piggyback is more efficient and usually saves a
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network-round-trip for first time fetches of records. However, a
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few Z39.50 servers do not support piggyback or they ignore element
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set names. For those, piggyback should be disabled.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>charset</term>
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<listitem>
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<para>
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A string that specifies character set to be used in Z39.50
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language and character set negotiation. Use strings such as:
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<literal>ISO-8859-1</literal>, <literal>UTF-8</literal>,
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<literal>UTF-16</literal>.
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</para>
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<para>
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Most Z39.50 servers do not support this feature (and thus, this is
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ignored). Many servers use the ISO-8859-1 encoding for queries and
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messages. MARC21/USMARC records are not affected by this setting.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>preferredMessageSize</term>
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<listitem>
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<para>
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An integer that specifies the maximum byte size of all records
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to be returned by a target during retrieval. See the
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<link xlink:href="&url.yaz.z3950.4;">Z39.50 standard</link> for more
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information.
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</para>
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<note>
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<para>
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This option is supported in PECL YAZ 1.0.5 or later.
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</para>
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</note>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term>maximumRecordSize</term>
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<listitem>
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<para>
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An integer that specifies the maximum byte size of a single record
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to be returned by a target during retrieval. This
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entity is referred to as Exceptional-record-size in the
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<link xlink:href="&url.yaz.z3950.4;">Z39.50 standard</link>.
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</para>
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<note>
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<para>
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This option is supported in PECL YAZ 1.0.5 or later.
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</para>
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</note>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect1>
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<refsect1 role="returnvalues">
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&reftitle.returnvalues;
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<para>
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A connection resource on success, &false; on error.
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</para>
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</refsect1>
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<refsect1 role="changelog">
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&reftitle.changelog;
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<para>
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<informaltable>
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<tgroup cols="2">
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<thead>
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<row>
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<entry>&Version;</entry>
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<entry>&Description;</entry>
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</row>
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</thead>
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<tbody>
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<row>
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<entry>4.1.0</entry>
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<entry>
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The parameter <parameter>options</parameter> was added.
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</entry>
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</row>
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</tbody>
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</tgroup>
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</informaltable>
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</para>
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</refsect1>
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<refsect1 role="seealso">
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&reftitle.seealso;
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<para>
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<simplelist>
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<member><function>yaz_close</function></member>
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</simplelist>
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</para>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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indent-tabs-mode:nil
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sgml-parent-document:nil
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sgml-default-dtd-file:"~/.phpdoc/manual.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:nil
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sgml-local-ecat-files:nil
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End:
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vim600: syn=xml fen fdm=syntax fdl=2 si
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vim: et tw=78 syn=sgml
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vi: ts=1 sw=1
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-->
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