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HTML
147 lines
7.4 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>更新表</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-update" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_update</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_update</span> — <span class="dc-title">
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更新表
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pg-update-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_update</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$table_name</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$data</code></span>
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, <span class="methodparam"><span class="type">array</span> <code class="parameter">$condition</code></span>
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[, <span class="methodparam"><span class="type">int</span> <code class="parameter">$options</code><span class="initializer"> = PGSQL_DML_EXEC</span></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_update()</strong></span> 用 <em>condition</em> 作为条件查询数据库，用 <em>data</em> 中的数据更新符合条件的记录。如果指定了 <em>options</em>，则 <span class="function"><a href="pg_convert.html" class="function">pg_convert()</a></span> 会按照指定选项作用到 <em>data</em> 上。
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</p>
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<div class="warning"><strong class="warning">Warning</strong><p class="simpara">此函数是<em class="emphasis">实验性</em>的。此函数的表象，包括名称及其相关文档都可能在未来的
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PHP 发布版本中未通知就被修改。使用本函数风险自担 。</p></div>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pg-update-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">connection</code></dt>
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<dd>
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<p class="para">
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PostgreSQL database connection resource.
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</p>
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</dd>
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<dt>
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<code class="parameter">table_name</code></dt>
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<dd>
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<p class="para">
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Name of the table into which to update rows.
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</p>
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</dd>
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<dt>
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<code class="parameter">data</code></dt>
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<dd>
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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> whose keys are field names in the table <code class="parameter">table_name</code>,
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and whose values are what matched rows are to be updated to.
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</p>
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</dd>
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<dt>
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<code class="parameter">condition</code></dt>
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<dd>
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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> whose keys are field names in the table <code class="parameter">table_name</code>,
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and whose values are the conditions that a row must meet to be updated.
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</p>
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</dd>
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<dt>
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<code class="parameter">options</code></dt>
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<dd>
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<p class="para">
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Any number of <strong><code>PGSQL_CONV_OPTS</code></strong>,
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<strong><code>PGSQL_DML_NO_CONV</code></strong>,
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<strong><code>PGSQL_DML_EXEC</code></strong> or
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<strong><code>PGSQL_DML_STRING</code></strong> combined. If <strong><code>PGSQL_DML_STRING</code></strong> is part of the
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<code class="parameter">options</code> then query string is returned.
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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-update-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。 Returns <span class="type"><a href="language.types.string.html" class="type string">string</a></span> if <strong><code>PGSQL_DML_STRING</code></strong> is passed
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via <code class="parameter">options</code>.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.pg-update-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-2521">
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<p><strong>Example #1 <span class="function"><strong>pg_update()</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 /> $db </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'dbname=foo'</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$data </span><span style="color: #007700">= array(</span><span style="color: #DD0000">'field1'</span><span style="color: #007700">=></span><span style="color: #DD0000">'AA'</span><span style="color: #007700">, </span><span style="color: #DD0000">'field2'</span><span style="color: #007700">=></span><span style="color: #DD0000">'BB'</span><span style="color: #007700">);<br /> <br /> </span><span style="color: #FF8000">// This is safe, since $_POST is converted automatically<br /> </span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_update</span><span style="color: #007700">(</span><span style="color: #0000BB">$db</span><span style="color: #007700">, </span><span style="color: #DD0000">'post_log'</span><span style="color: #007700">, </span><span style="color: #0000BB">$_POST</span><span style="color: #007700">, </span><span style="color: #0000BB">$data</span><span style="color: #007700">);<br /> if (</span><span style="color: #0000BB">$res</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Data is updated: </span><span style="color: #0000BB">$res</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> } else {<br /> echo </span><span style="color: #DD0000">"User must have sent wrong inputs\n"</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-update-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_convert.html" class="function" rel="rdfs-seeAlso">pg_convert()</a> - 将关联的数组值转换为适合 SQL 语句的格式。</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> |