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125 lines
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HTML
125 lines
7.1 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
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<html>
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<head>
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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Returns a single column from a row in the result set</title>
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</head>
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<body class="docs"><div id="layout">
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<div id="layout-content"><div id="function.db2-result" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">db2_result</h1>
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<p class="verinfo">(PECL ibm_db2 >= 1.0.0)</p><p class="refpurpose"><span class="refname">db2_result</span> — <span class="dc-title">
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Returns a single column from a row in the result set
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.db2-result-description">
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<h3 class="title">说明</h3>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>db2_result</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$stmt</code></span>
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, <span class="methodparam"><span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span> <code class="parameter">$column</code></span>
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) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>
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<p class="para rdfs-comment">
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Use <span class="function"><strong>db2_result()</strong></span> to return the value of a specified
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column in the current row of a result set. You must call
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<span class="function"><a href="db2_fetch_row.html" class="function">db2_fetch_row()</a></span> before calling
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<span class="function"><strong>db2_result()</strong></span> to set the location of the result set
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pointer.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.db2-result-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">stmt</code></dt>
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<dd>
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<p class="para">
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A valid <em>stmt</em> resource.
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</p>
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</dd>
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<dt>
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<code class="parameter">column</code></dt>
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<dd>
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<p class="para">
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Either an integer mapping to the 0-indexed field in the result set, or
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a string matching the name of the column.
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</p>
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</dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.db2-result-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns the value of the requested field if the field exists in the result
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set. Returns NULL if the field does not exist, and issues a warning.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.db2-result-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-1271">
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<p><strong>Example #1 A <span class="function"><strong>db2_result()</strong></span> example</strong></p>
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<div class="example-contents"><p>
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The following example demonstrates how to iterate through a result set
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with <span class="function"><a href="db2_fetch_row.html" class="function">db2_fetch_row()</a></span> and retrieve columns from the
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result set with <span class="function"><strong>db2_result()</strong></span>.
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</p></div>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$sql </span><span style="color: #007700">= </span><span style="color: #DD0000">'SELECT name, breed FROM animals WHERE weight < ?'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$stmt </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_prepare</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$sql</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">db2_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, array(</span><span style="color: #0000BB">10</span><span style="color: #007700">));<br />while (</span><span style="color: #0000BB">db2_fetch_row</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">$name </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$breed </span><span style="color: #007700">= </span><span style="color: #0000BB">db2_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$stmt</span><span style="color: #007700">, </span><span style="color: #DD0000">'BREED'</span><span style="color: #007700">);<br /> print </span><span style="color: #DD0000">"</span><span style="color: #0000BB">$name</span><span style="color: #DD0000"> </span><span style="color: #0000BB">$breed</span><span style="color: #DD0000">"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
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</span>
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</pre></div>
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</div>
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<div class="example-contents"><p>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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cat Pook
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gold fish Bubbles
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budgerigar Gizmo
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goat Rickety Ride
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</pre></div>
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</div>
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</div>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.db2-result-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="db2_fetch_array.html" class="function" rel="rdfs-seeAlso">db2_fetch_array()</a> - Returns an array, indexed by column position, representing a row in a result set</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_assoc.html" class="function" rel="rdfs-seeAlso">db2_fetch_assoc()</a> - Returns an array, indexed by column name, representing a row in a result set</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_both.html" class="function" rel="rdfs-seeAlso">db2_fetch_both()</a> - Returns an array, indexed by both column name and position, representing a row in a result set</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_object.html" class="function" rel="rdfs-seeAlso">db2_fetch_object()</a> - Returns an object with properties representing columns in the fetched row</span></li>
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<li class="member"><span class="function"><a href="db2_fetch_row.html" class="function" rel="rdfs-seeAlso">db2_fetch_row()</a> - Sets the result set pointer to the next row or requested row</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |