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58 lines
4.0 KiB
HTML
58 lines
4.0 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>执行查询</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-query" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_query</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_query</span> — <span class="dc-title">执行查询</span></p>
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</div>
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<div class="refsect1 unknown-seealsp" id="refsect1-function.pg-query-unknown-seealsp">
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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_query</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$query</code></span>
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) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pg_query()</strong></span>
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在查询可以执行时返回查询结果资源号。如果查询失败或者提供的连接号无效则返回
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<strong><code>FALSE</code></strong>。如果连接号有效，则可以用 <span class="function"><a href="pg_last_error.html" class="function">pg_last_error()</a></span>
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函数来提取详细的错误信息。<span class="function"><strong>pg_query()</strong></span>
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发送一条 SQL 语句到 <code class="parameter">connection</code>
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资源指定的 PostgreSQL 数据库。<code class="parameter">connection</code>
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必须是由 <span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span> 或 <span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>
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返回的合法连接号。本函数返回值是一个其它 PostgreSQL 函数例如
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<span class="function"><a href="pg_fetch_array.html" class="function">pg_fetch_array()</a></span> 可以用来访问查询结果的查询结果资源号。
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<span class="simpara">
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<code class="parameter">connection</code> 是 <span class="function"><strong>pg_query()</strong></span>
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中的可选参数。如果没有指定
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<code class="parameter">connection</code>，则使用默认连接。默认连接是
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<span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span> 或 <span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>
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所打开的最后一个连接。
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</span>
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<span class="simpara">
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尽管 <code class="parameter">connection</code>
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参数可以省略，但不推荐这样做。因为这样可能会导致很难发现脚本中的错误。
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</span>
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</p></blockquote>
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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本函数以前的名字为 <em>pg_exec()</em>。<em>pg_exec()</em>
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函数为了兼容性的原因仍然可以使用，但是鼓励用户使用新的名字。
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</p>
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</p></blockquote>
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<p class="para">
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参见 <span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span>，<span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>，<span class="function"><a href="pg_fetch_array.html" class="function">pg_fetch_array()</a></span>，<span class="function"><a href="pg_fetch_object.html" class="function">pg_fetch_object()</a></span>，<span class="function"><a href="pg_num_rows.html" class="function">pg_num_rows()</a></span>
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和 <span class="function"><a href="pg_affected_rows.html" class="function">pg_affected_rows()</a></span>。
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</p>
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</div>
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</div></div></div></body></html> |