function.yaz-connect.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Prepares for a connection to a Z39.50 server</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.yaz-close.html">yaz_close</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.yaz-database.html">yaz_database</a></div> <div class="up"><a href="ref.yaz.html">YAZ Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.yaz-connect" class="refentry"> <div class="refnamediv"> <h1 class="refname">yaz_connect</h1> <p class="verinfo">(PHP 4 >= 4.0.1, PECL yaz:0.9-1.0.9)</p><p class="refpurpose"><span class="refname">yaz_connect</span> — <span class="dc-title"> Prepares for a connection to a Z39.50 server </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <span class="methodname"><b><b>yaz_connect</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$zurl</tt></span> [, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <tt class="parameter">$options</tt></span> ] )</div> <p class="para rdfs-comment"> This function returns a connection resource on success, zero on failure. </p> <p class="para"> <b>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" class="function">yaz_wait()</a> is called. </p> <blockquote><p><b class="note">Note</b>: The <a href="http://www.indexdata.dk/yazproxy/" class="link external">» YAZ proxy</a> is a freely available Z39.50 proxy. <br /> </p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">zurl</tt></i></span> <dd> <p class="para"> A string that takes the form <i>host[:port][/database]</i>. If port is omitted, port 210 is used. If database is omitted <i>Default</i> is used. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">options</tt></i></span> <dd> <p class="para"> If given as a string, it is treated as the Z39.50 V2 authentication string (OpenAuth). </p> <p class="para"> If given as an array, the contents of the array serves as options. <dl> <dt> <span class="term">user</span> <dd> <p class="para"> Username for authentication. </p> </dd> </dt> <dt> <span class="term">group</span> <dd> <p class="para"> Group for authentication. </p> </dd> </dt> <dt> <span class="term">password</span> <dd> <p class="para"> Password for authentication. </p> </dd> </dt> <dt> <span class="term">cookie</span> <dd> <p class="para"> Cookie for session (YAZ proxy). </p> </dd> </dt> <dt> <span class="term">proxy</span> <dd> <p class="para"> Proxy for connection (YAZ proxy). </p> </dd> </dt> <dt> <span class="term">persistent</span> <dd> <p class="para"> A boolean. If <b><tt>TRUE</tt></b> the connection is persistent; If <b><tt>FALSE</tt></b> the connection is not persistent. By default connections are persistent. </p> <blockquote><p><b class="note">Note</b>: If you open a persistent connection, you won't be able to close it later with <a href="function.yaz-close.html" class="function">yaz_close()</a>. <br /> </p></blockquote> </dd> </dt> <dt> <span class="term">piggyback</span> <dd> <p class="para"> A boolean. If <b><tt>TRUE</tt></b> piggyback is enabled for searches; If <b><tt>FALSE</tt></b> piggyback is disabled. By default piggyback is enabled. </p> <p class="para"> 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> <dt> <span class="term">charset</span> <dd> <p class="para"> A string that specifies character set to be used in Z39.50 language and character set negotiation. Use strings such as: <i>ISO-8859-1</i>, <i>UTF-8</i>, <i>UTF-16</i>. </p> <p class="para"> 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> <dt> <span class="term">preferredMessageSize</span> <dd> <p class="para"> 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" class="link external">» Z39.50 standard</a> for more information. </p> <blockquote><p><b class="note">Note</b>: This option is supported in PECL YAZ 1.0.5 or later. <br /> </p></blockquote> </dd> </dt> <dt> <span class="term">maximumRecordSize</span> <dd> <p class="para"> 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" class="link external">» Z39.50 standard</a>. </p> <blockquote><p><b class="note">Note</b>: This option is supported in PECL YAZ 1.0.5 or later. <br /> </p></blockquote> </dd> </dt> </dl> </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> A connection resource on success, <b><tt>FALSE</tt></b> on error. </p> </div> <div class="refsect1 changelog"> <h3 class="title">ChangeLog</h3> <p class="para"> <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Version</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">4.1.0</td> <td colspan="1" rowspan="1" align="left"> The parameter <i><tt class="parameter">options</tt></i> was added. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.yaz-close.html" class="function" rel="rdfs-seeAlso">yaz_close()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.yaz-close.html">yaz_close</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.yaz-database.html">yaz_database</a></div> <div class="up"><a href="ref.yaz.html">YAZ Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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