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38 lines
3.1 KiB
HTML
38 lines
3.1 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>从结果资源中返回值</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-result" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_fetch_result</h1>
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<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_fetch_result</span> — <span class="dc-title">从结果资源中返回值</span></p>
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</div>
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<div class="refsect1 unknown-unknown-unknown-unknown-unknown-seealst" id="refsect1-function.pg-fetch-result-unknown-unknown-unknown-unknown-unknown-seealst">
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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_result</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
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, <span class="methodparam"><span class="type">int</span> <code class="parameter">$row</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">$field</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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<span class="function"><strong>pg_fetch_result()</strong></span> 根据由 <span class="function"><a href="pg_query.html" class="function">pg_query()</a></span> 返回的 <code class="parameter">result</code> 资源返回相应的值。<code class="parameter">row</code> 为整型数。<code class="parameter">field</code> 为字段名（字符串）或字段索引（整数）。<code class="parameter">row</code> 和 <code class="parameter">field</code> 指明了查询结果中的哪个单元被返回。行编号从 0 开始。除了用字段名之外，还可以用不带引号的数字作为字段索引。字段索引从 0 开始。
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</p>
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<p class="para">
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PostgreSQL 有很多内置的类型，这里只直接支持基本类型。所有形式的
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<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span>，<span class="type"><a href="language.types.boolean.html" class="type boolean">boolean</a></span> 和 void 类型都被返回为
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<span class="type"><a href="language.types.integer.html" class="type integer">integer</a></span> 值。所有形式的 float 和 real 类型都被返回为
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<span class="type"><a href="language.types.float.html" class="type float">float</a></span> 值。Boolean 类型被返回为 "t" 或者
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"f"。所有其它类型包括数组都被返回为字符串，该字符串的格式和默认的
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PostgreSQL 风格一样，可以在 <strong class="command">psql</strong> 程序中看到。
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</p>
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</div>
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</div></div></div></body></html> |