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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>Examples</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="yaz.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.yaz.html">YAZ Functions</a></div> <div class="up"><a href="book.yaz.html">YAZ</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1>Examples</h1> <p class="para"> PHP/YAZ keeps track of connections with targets (Z-Associations). A resource represents a connection to a target. </p> <p class="para"> The script below demonstrates the parallel searching feature of the API. When invoked with no arguments it prints a query form; else (arguments are supplied) it searches the targets as given in array <i>host</i>. </p> <p class="para"> <div class="example"> <p><b>Example #1 Parallel searching using Yaz</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br />$host</span><span style="color: #007700">=</span><span style="color: #0000BB">$_REQUEST</span><span style="color: #007700">[</span><span style="color: #0000BB">host</span><span style="color: #007700">];<br /></span><span style="color: #0000BB">$query</span><span style="color: #007700">=</span><span style="color: #0000BB">$_REQUEST</span><span style="color: #007700">[</span><span style="color: #0000BB">query</span><span style="color: #007700">];<br /></span><span style="color: #0000BB">$num_hosts </span><span style="color: #007700">= </span><span style="color: #0000BB">count</span><span style="color: #007700">(</span><span style="color: #0000BB">$host</span><span style="color: #007700">);<br />if (empty(</span><span style="color: #0000BB">$query</span><span style="color: #007700">) || </span><span style="color: #0000BB">count</span><span style="color: #007700">(</span><span style="color: #0000BB">$host</span><span style="color: #007700">) == </span><span style="color: #0000BB">0</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">'<form method="get"><br /> <input type="checkbox"<br /> name="host[]" value="bagel.indexdata.dk/gils" /><br /> GILS test<br /> <input type="checkbox"<br /> name="host[]" value="localhost:9999/Default" /><br /> local test<br /> <input type="checkbox" checked="checked"<br /> name="host[]" value="z3950.loc.gov:7090/voyager" /><br /> Library of Congress<br /> <br /><br /> RPN Query:<br /> <input type="text" size="30" name="query" /><br /> <input type="submit" name="action" value="Search" /><br /> </form><br /> '</span><span style="color: #007700">; <br />} else {<br /> echo </span><span style="color: #DD0000">'You searched for ' </span><span style="color: #007700">. </span><span style="color: #0000BB">htmlspecialchars</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">) . </span><span style="color: #DD0000">'<br />'</span><span style="color: #007700">;<br /> for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">$num_hosts</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> </span><span style="color: #0000BB">$id</span><span style="color: #007700">[] = </span><span style="color: #0000BB">yaz_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">$host</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">]);<br /> </span><span style="color: #0000BB">yaz_syntax</span><span style="color: #007700">(</span><span style="color: #0000BB">$id</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">], </span><span style="color: #DD0000">"usmarc"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">yaz_range</span><span style="color: #007700">(</span><span style="color: #0000BB">$id</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">], </span><span style="color: #0000BB">1</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">yaz_search</span><span style="color: #007700">(</span><span style="color: #0000BB">$id</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">], </span><span style="color: #DD0000">"rpn"</span><span style="color: #007700">, </span><span style="color: #0000BB">$query</span><span style="color: #007700">);<br /> }<br /> </span><span style="color: #0000BB">yaz_wait</span><span style="color: #007700">();<br /> for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">$num_hosts</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> echo </span><span style="color: #DD0000">'<hr />' </span><span style="color: #007700">. </span><span style="color: #0000BB">$host</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">] . </span><span style="color: #DD0000">':'</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$error </span><span style="color: #007700">= </span><span style="color: #0000BB">yaz_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$id</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">]);<br /> if (!empty(</span><span style="color: #0000BB">$error</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"Error: $error"</span><span style="color: #007700">;<br /> } else {<br /> </span><span style="color: #0000BB">$hits </span><span style="color: #007700">= </span><span style="color: #0000BB">yaz_hits</span><span style="color: #007700">(</span><span style="color: #0000BB">$id</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">]);<br /> echo </span><span style="color: #DD0000">"Result Count $hits"</span><span style="color: #007700">;<br /> }<br /> echo </span><span style="color: #DD0000">'<dl>'</span><span style="color: #007700">;<br /> for (</span><span style="color: #0000BB">$p </span><span style="color: #007700">= </span><span style="color: #0000BB">1</span><span style="color: #007700">; </span><span style="color: #0000BB">$p </span><span style="color: #007700"><= </span><span style="color: #0000BB">10</span><span style="color: #007700">; </span><span style="color: #0000BB">$p</span><span style="color: #007700">++) {<br /> </span><span style="color: #0000BB">$rec </span><span style="color: #007700">= </span><span style="color: #0000BB">yaz_record</span><span style="color: #007700">(</span><span style="color: #0000BB">$id</span><span style="color: #007700">[</span><span style="color: #0000BB">$i</span><span style="color: #007700">], </span><span style="color: #0000BB">$p</span><span style="color: #007700">, </span><span style="color: #DD0000">"string"</span><span style="color: #007700">);<br /> if (empty(</span><span style="color: #0000BB">$rec</span><span style="color: #007700">)) continue;<br /> echo </span><span style="color: #DD0000">"<dt><b>$p</b></dt><dd>"</span><span style="color: #007700">;<br /> echo </span><span style="color: #0000BB">nl2br</span><span style="color: #007700">(</span><span style="color: #0000BB">$rec</span><span style="color: #007700">);<br /> echo </span><span style="color: #DD0000">"</dd>"</span><span style="color: #007700">;<br /> }<br /> echo </span><span style="color: #DD0000">'</dl>'</span><span style="color: #007700">;<br /> }<br />}<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="yaz.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.yaz.html">YAZ Functions</a></div> <div class="up"><a href="book.yaz.html">YAZ</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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