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107 lines
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HTML
107 lines
5.8 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>Fetches all rows in a particular result column as an array</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.pg-fetch-all-columns" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_fetch_all_columns</h1>
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<p class="verinfo">(PHP 5 >= 5.1.0, PHP 7)</p><p class="refpurpose"><span class="refname">pg_fetch_all_columns</span> — <span class="dc-title">Fetches all rows in a particular result column as an array</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pg-fetch-all-columns-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>pg_fetch_all_columns</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$column</code><span class="initializer"> = 0</span></span>
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] ) : <span class="type">array</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pg_fetch_all_columns()</strong></span> returns an array that
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contains all rows (records) in a particular column of the result resource.
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>: <span class="simpara">此函数将 NULL 字段设置为 PHP <strong><code>NULL</code></strong> 值。</span></p></blockquote>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pg-fetch-all-columns-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">result</code></dt>
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<dd>
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<p class="para">
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PostgreSQL query result resource, returned by <span class="function"><a href="pg_query.html" class="function">pg_query()</a></span>,
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<span class="function"><a href="pg_query_params.html" class="function">pg_query_params()</a></span> or <span class="function"><a href="pg_execute.html" class="function">pg_execute()</a></span>
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(among others).
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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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Column number, zero-based, to be retrieved from the result resource. Defaults
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to the first column if not specified.
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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.pg-fetch-all-columns-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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An <span class="type"><a href="language.types.array.html" class="type array">array</a></span> with all values in the result column.
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</p>
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<p class="para">
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<strong><code>FALSE</code></strong> is returned if <code class="parameter">column</code> is larger than the number
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of columns in the result, or on any other error.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.pg-fetch-all-columns-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-2487">
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<p><strong>Example #1 <span class="function"><strong>pg_fetch_all_columns()</strong></span> example</strong></p>
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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 />$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"An error occurred.\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT title, name, address FROM authors"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"An error occurred.\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #FF8000">// Get an array of all author names<br /></span><span style="color: #0000BB">$arr </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_fetch_all_columns</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr</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>
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</p>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.pg-fetch-all-columns-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="pg_fetch_all.html" class="function" rel="rdfs-seeAlso">pg_fetch_all()</a> - 从结果中提取所有行作为一个数组</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> |