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148 lines
5.6 KiB
HTML
148 lines
5.6 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>获得表的元数据</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-meta-data" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_meta_data</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_meta_data</span> — <span class="dc-title">
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获得表的元数据
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pg-meta-data-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_meta_data</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="type">array</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pg_metadata()</strong></span> 以数组形式返回 <em>table_name</em> 表的定义。
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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-meta-data-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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The name of the table.
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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-meta-data-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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以数组 <span class="type"><a href="language.types.array.html" class="type array">array</a></span> 形式返回表的定义，如果出错则返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.pg-meta-data-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-2506">
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<p><strong>Example #1 取得表的元数据</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 /> $dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">) or die(</span><span style="color: #DD0000">"Could not connect"</span><span style="color: #007700">);<br /><br /> </span><span style="color: #0000BB">$meta </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_meta_data</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">'authors'</span><span style="color: #007700">);<br /> if (</span><span style="color: #0000BB">is_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$meta</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">'<pre>'</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$meta</span><span style="color: #007700">);<br /> echo </span><span style="color: #DD0000">'</pre>'</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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array(3) {
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["author"]=>
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array(5) {
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["num"]=>
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int(1)
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["type"]=>
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string(7) "varchar"
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["len"]=>
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int(-1)
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["not null"]=>
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bool(false)
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["has default"]=>
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bool(false)
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}
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["year"]=>
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array(5) {
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["num"]=>
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int(2)
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["type"]=>
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string(4) "int2"
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["len"]=>
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int(2)
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["not null"]=>
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bool(false)
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["has default"]=>
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bool(false)
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}
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["title"]=>
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array(5) {
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["num"]=>
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int(3)
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["type"]=>
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string(7) "varchar"
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["len"]=>
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int(-1)
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["not null"]=>
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bool(false)
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["has default"]=>
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bool(false)
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}
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}
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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-meta-data-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> |