📄 function.dbx-sort.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>Sort a result from a dbx_query by a custom sort function</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="ref.dbx.html">dbx Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.uodbc.html">ODBC</a></div> <div class="up"><a href="ref.dbx.html">dbx Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.dbx-sort" class="refentry"> <div class="refnamediv"> <h1 class="refname">dbx_sort</h1> <p class="verinfo">(PHP 4 >= 4.0.6, PHP 5 <= 5.0.5, PECL dbx:1.1.0)</p><p class="refpurpose"><span class="refname">dbx_sort</span> — <span class="dc-title"> Sort a result from a dbx_query by a custom sort function </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>dbx_sort</b></b></span> ( <span class="methodparam"><span class="type">object</span> <tt class="parameter">$result</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$user_compare_function</tt></span> )</div> <p class="para rdfs-comment"> Sort a result from a <a href="function.dbx-query.html" class="function">dbx_query()</a> call with a custom sort function. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">result</tt></i></span> <dd> <p class="para"> A result set returned by <a href="function.dbx-query.html" class="function">dbx_query()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">user_compare_function</tt></i></span> <dd> <p class="para"> The user-defined comparison function. It must accept two arguments and return an integer less than, equal to, or greater than zero if the first argument is considered to be respectively less than, equal to, or greater than the second. </p> </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> <p class="para"> <div class="example"> <p><b>Example #1 <b>dbx_sort()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #007700">function </span><span style="color: #0000BB">user_re_order</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">) <br />{<br /> </span><span style="color: #0000BB">$rv </span><span style="color: #007700">= </span><span style="color: #0000BB">dbx_compare</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">, </span><span style="color: #DD0000">"parentid"</span><span style="color: #007700">, </span><span style="color: #0000BB">DBX_CMP_DESC</span><span style="color: #007700">);<br /> if (!</span><span style="color: #0000BB">$rv</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">$rv </span><span style="color: #007700">= </span><span style="color: #0000BB">dbx_compare</span><span style="color: #007700">(</span><span style="color: #0000BB">$a</span><span style="color: #007700">, </span><span style="color: #0000BB">$b</span><span style="color: #007700">, </span><span style="color: #DD0000">"id"</span><span style="color: #007700">, </span><span style="color: #0000BB">DBX_CMP_NUMBER</span><span style="color: #007700">);<br /> }<br /> return </span><span style="color: #0000BB">$rv</span><span style="color: #007700">;<br />}<br /><br /></span><span style="color: #0000BB">$link </span><span style="color: #007700">= </span><span style="color: #0000BB">dbx_connect</span><span style="color: #007700">(</span><span style="color: #0000BB">DBX_ODBC</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">, </span><span style="color: #DD0000">"db"</span><span style="color: #007700">, </span><span style="color: #DD0000">"username"</span><span style="color: #007700">, </span><span style="color: #DD0000">"password"</span><span style="color: #007700">)<br /> or die(</span><span style="color: #DD0000">"Could not connect"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">dbx_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT id, parentid, description FROM tbl ORDER BY id"</span><span style="color: #007700">);<br /> </span><span style="color: #FF8000">// data in $result is now ordered by id<br /><br /></span><span style="color: #0000BB">dbx_sort</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #DD0000">"user_re_order"</span><span style="color: #007700">);<br /> </span><span style="color: #FF8000">// data in $result is now ordered by parentid (descending), then by id<br /><br /></span><span style="color: #0000BB">dbx_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: It is always better to use <i>ORDER BY</i> <i>SQL</i> clause instead of <b>dbx_sort()</b> if possible. <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.dbx-compare.html" class="function" rel="rdfs-seeAlso">dbx_compare()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="ref.dbx.html">dbx Functions</a></div> <div class="next" style="text-align: right; float: right;"><a href="book.uodbc.html">ODBC</a></div> <div class="up"><a href="ref.dbx.html">dbx 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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