function.yaz-search.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 search</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-schema.html">yaz_schema</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.yaz-set-option.html">yaz_set_option</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-search" class="refentry"> <div class="refnamediv"> <h1 class="refname">yaz_search</h1> <p class="verinfo">(PHP 4 >= 4.0.1, PECL yaz:0.9-1.0.9)</p><p class="refpurpose"><span class="refname">yaz_search</span> — <span class="dc-title">Prepares for a search</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>yaz_search</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$id</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$type</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$query</tt></span> )</div> <p class="para rdfs-comment"> <b>yaz_search()</b> prepares for a search on the given connection. </p> <p class="para"> Like <a href="function.yaz-connect.html" class="function">yaz_connect()</a> this function is non-blocking and only prepares for a search to be executed later when <a href="function.yaz-wait.html" class="function">yaz_wait()</a> is called. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">id</tt></i></span> <dd> <p class="para"> The connection resource returned by <a href="function.yaz-connect.html" class="function">yaz_connect()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">type</tt></i></span> <dd> <p class="para"> This parameter represents the query type - only <i>"rpn"</i> is supported now in which case the third argument specifies a Type-1 query in prefix query notation. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">query</tt></i></span> <dd> <p class="para"> The RPN query is a textual representation of the Type-1 query as defined by the Z39.50 standard. However, in the text representation as used by YAZ a prefix notation is used, that is the operator precedes the operands. The query string is a sequence of tokens where white space is ignored unless surrounded by double quotes. Tokens beginning with an at-character (<i>@</i>) are considered operators, otherwise they are treated as search terms. </p> <table border="5"> <caption><b>RPN Operators</b></caption> <colgroup> <col align="left" width="1" /> <col align="left" width="2" /> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Construct</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><i>@and</i> query1 query2</td> <td colspan="1" rowspan="1" align="left">intersection of query1 and query2</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><i>@or</i> query1 query2</td> <td colspan="1" rowspan="1" align="left">union of query1 and query2</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><i>@not</i> query1 query2</td> <td colspan="1" rowspan="1" align="left">query1 and not query2</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><i>@set</i> name</td> <td colspan="1" rowspan="1" align="left">result set reference</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><i>@attrset</i> set query</td> <td colspan="1" rowspan="1" align="left"> specifies attribute-set for query. This construction is only allowed once - in the beginning of the whole query </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left"><i>@attr</i> [set] type=value query</td> <td colspan="1" rowspan="1" align="left"> applies attribute to query. The type and value are integers specifying the attribute-type and attribute-value respectively. The set, if given, specifies the attribute-set. </td> </tr> </tbody> </colgroup> </table> <p class="para"> You can find information about attributes at the <a href="http://www.loc.gov/z3950/agency/defns/bib1.html" class="link external">» Z39.50 Maintenance Agency</a> site. </p> <blockquote><p><b class="note">Note</b>: If you would like to use a more friendly notation, use the CCL parser - functions <a href="function.yaz-ccl-conf.html" class="function">yaz_ccl_conf()</a> and <a href="function.yaz-ccl-parse.html" class="function">yaz_ccl_parse()</a>. <br /> </p></blockquote> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <div class="example"> <p><b>Example #1 Query Examples</b></p> <div class="example-contents"><p> You can search for simple terms, like this: <div class="example-contents"><pre><div class="cdata"><pre>computer</pre></div> </pre></div> which matches documents where "computer" occur. No attributes are specified. </p></div> <div class="example-contents"><p> The query <div class="example-contents"><pre><div class="cdata"><pre>"knuth donald"</pre></div> </pre></div> matches documents where "knuth donald" occur (provided that the server supports phrase search). </p></div> <div class="example-contents"><p> This query applies two attributes for the same phrase. <div class="example-contents"><pre>@attr 1=1003 @attr 4=1 "knuth donald"</pre></div> First attribute is type 1 (Bib-1 use), attribute value is 1003 (Author). Second attribute has is type 4 (structure), value 1 (phrase), so this should match documents where Donald Knuth is author. </p></div> <div class="example-contents"><p> The query <div class="example-contents"><pre><div class="cdata"><pre>@and @or a b @not @or c d e</pre></div> </pre></div> would in infix notation look like <i>(a or b) and ((c or d) not e)</i>. </p></div> <div class="example-contents"><p> Another, more complex, one: <div class="example-contents"><pre><div class="cdata"><pre>@attrset gils @and @attr 1=4 art @attr 1=2000 company</pre></div> </pre></div> The query as a whole uses the GILS attributeset. The query matches documents where <i>art</i> occur in the title (GILS,BIB-1) and in which <i>company</i> occur as Distributor (GILS). </p></div> </div> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.yaz-schema.html">yaz_schema</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.yaz-set-option.html">yaz_set_option</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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