mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-17 21:16:57 +08:00
91 lines
11 KiB
HTML
91 lines
11 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
||
<html>
|
||
<head>
|
||
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
||
<title>Adjusts the result pointer to an arbitary row in the result</title>
|
||
</head>
|
||
<body class="docs"><div id="layout">
|
||
<div id="layout-content"><div id="function.maxdb-data-seek" class="refentry">
|
||
<div class="refnamediv">
|
||
<h1 class="refname">maxdb_data_seek</h1>
|
||
<h1 class="refname">maxdb_result::data_seek</h1>
|
||
<p class="verinfo">(PECL maxdb >= 1.0)</p><p class="refpurpose"><span class="refname">maxdb_data_seek</span> -- <span class="refname">maxdb_result::data_seek</span> — <span class="dc-title">Adjusts the result pointer to an arbitary row in the result</span></p>
|
||
|
||
</div>
|
||
|
||
<div class="refsect1 description" id="refsect1-function.maxdb-data-seek-description">
|
||
<h3 class="title">说明</h3>
|
||
<p class="para">过程化风格</p>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>maxdb_data_seek</strong></span>
|
||
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
|
||
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code></span>
|
||
) : <span class="type">bool</span></div>
|
||
|
||
<p class="para rdfs-comment">面向对象风格</p>
|
||
<div class="methodsynopsis dc-description">
|
||
<span class="methodname"><strong>maxdb_result::data_seek</strong></span>
|
||
( <span class="methodparam"><span class="type">int</span> <code class="parameter">$offset</code></span>
|
||
) : <span class="type">bool</span></div>
|
||
|
||
<p class="para rdfs-comment">
|
||
The <span class="function"><strong>maxdb_data_seek()</strong></span> function seeks to an arbitrary result pointer
|
||
specified by the <code class="parameter">offset</code> in the result set represented by
|
||
<code class="parameter">result</code>. The <code class="parameter">offset</code> parameter must be between
|
||
zero and the total number of rows minus one (0..<span class="function"><a href="maxdb_num_rows.html" class="function">maxdb_num_rows()</a></span> - 1).
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 returnvalues" id="refsect1-function.maxdb-data-seek-returnvalues">
|
||
<h3 class="title">返回值</h3>
|
||
<p class="para">
|
||
成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
|
||
</p>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 examples" id="refsect1-function.maxdb-data-seek-examples">
|
||
<h3 class="title">范例</h3>
|
||
<div class="example" id="example-1336">
|
||
<p><strong>Example #1 面向对象风格</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* Open a connection */<br /></span><span style="color: #0000BB">$maxdb </span><span style="color: #007700">= new </span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #DD0000">"SELECT name, state FROM hotel.city ORDER BY name"</span><span style="color: #007700">;<br />if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">( </span><span style="color: #0000BB">$query</span><span style="color: #007700">)) {<br /><br /> </span><span style="color: #FF8000">/* seek to row no. 10 */<br /> </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">data_seek</span><span style="color: #007700">(</span><span style="color: #0000BB">10</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">/* fetch row */<br /> </span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">fetch_row</span><span style="color: #007700">();<br /><br /> </span><span style="color: #0000BB">printf </span><span style="color: #007700">(</span><span style="color: #DD0000">"City: %s State: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">], </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<br /><br /> </span><span style="color: #FF8000">/* free result set*/<br /> </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
</div>
|
||
<div class="example" id="example-1337">
|
||
<p><strong>Example #2 过程化风格</strong></p>
|
||
<div class="example-contents">
|
||
<div class="phpcode"><pre><span style="color: #000000">
|
||
<span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #DD0000">"SELECT name, state FROM hotel.city ORDER BY name"</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #0000BB">$query</span><span style="color: #007700">)) {<br /><br /> </span><span style="color: #FF8000">/* seek to row no. 400 */<br /> </span><span style="color: #0000BB">maxdb_data_seek</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">10</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">/* fetch row */<br /> </span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_fetch_row</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">printf </span><span style="color: #007700">(</span><span style="color: #DD0000">"City: %s State: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">0</span><span style="color: #007700">], </span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]);<br /><br /> </span><span style="color: #FF8000">/* free result set*/<br /> </span><span style="color: #0000BB">maxdb_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
||
</span>
|
||
</pre></div>
|
||
</div>
|
||
|
||
</div>
|
||
<p class="para">以上例程的输出类似于：</p>
|
||
<div class="example-contents screen">
|
||
<div class="cdata"><pre>
|
||
City: Irvine State: CA
|
||
</pre></div>
|
||
</div>
|
||
</div>
|
||
|
||
|
||
<div class="refsect1 seealso" id="refsect1-function.maxdb-data-seek-seealso">
|
||
<h3 class="title">参见</h3>
|
||
<p class="para">
|
||
<ul class="simplelist">
|
||
<li class="member"><span class="function"><a href="maxdb_store_result.html" class="function" rel="rdfs-seeAlso">maxdb_store_result()</a> - Transfers a result set from the last query</span></li>
|
||
<li class="member"><span class="function"><a href="maxdb_fetch_row.html" class="function" rel="rdfs-seeAlso">maxdb_fetch_row()</a> - Get a result row as an enumerated array</span></li>
|
||
<li class="member"><span class="function"><a href="maxdb_num_rows.html" class="function" rel="rdfs-seeAlso">maxdb_num_rows()</a> - Gets the number of rows in a result</span></li>
|
||
</ul>
|
||
</p>
|
||
</div>
|
||
|
||
|
||
</div></div></div></body></html> |