mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
71 lines
6.4 KiB
HTML
71 lines
6.4 KiB
HTML
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
|
|
<html>
|
|
<head>
|
|
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
|
|
<title>返回字段的名字</title>
|
|
</head>
|
|
<body class="docs"><div id="layout">
|
|
<div id="layout-content"><div id="function.pg-field-name" class="refentry">
|
|
<div class="refnamediv">
|
|
<h1 class="refname">pg_field_name</h1>
|
|
<p class="verinfo">(PHP 4 >= 4.2.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_field_name</span> — <span class="dc-title">返回字段的名字</span></p>
|
|
|
|
</div>
|
|
<div class="refsect1 unknown-unknown-seealsq" id="refsect1-function.pg-field-name-unknown-unknown-seealsq">
|
|
<h3 class="title">说明</h3>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>pg_field_name</strong></span>
|
|
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
|
|
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$field_number</code></span>
|
|
) : <span class="type">string</span></div>
|
|
|
|
<p class="para rdfs-comment">
|
|
<span class="function"><strong>pg_field_name()</strong></span> 返回给定 PostgreSQL <code class="parameter">result</code> 资源中的 <code class="parameter">field_number</code> 所代表的字段名。字段编号从 0 开始。
|
|
</p>
|
|
<p class="para">
|
|
<div class="example" id="example-2494">
|
|
<p><strong>Example #1 获取字段信息</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br /> $dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">) or die(</span><span style="color: #DD0000">"Could not connect"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">, </span><span style="color: #DD0000">"select * from authors where author = 'Orwell'"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_num_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">);<br /> for (</span><span style="color: #0000BB">$j </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$j </span><span style="color: #007700">< </span><span style="color: #0000BB">$i</span><span style="color: #007700">; </span><span style="color: #0000BB">$j</span><span style="color: #007700">++) {<br /> echo </span><span style="color: #DD0000">"column </span><span style="color: #0000BB">$j</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> </span><span style="color: #0000BB">$fieldname </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_field_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">, </span><span style="color: #0000BB">$j</span><span style="color: #007700">);<br /> echo </span><span style="color: #DD0000">"fieldname: </span><span style="color: #0000BB">$fieldname</span><span style="color: #DD0000">\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"printed length: "</span><span style="color: #007700">.</span><span style="color: #0000BB">pg_field_prtlen</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">, </span><span style="color: #0000BB">$fieldname</span><span style="color: #007700">).</span><span style="color: #DD0000">" characters\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"storage length: "</span><span style="color: #007700">.</span><span style="color: #0000BB">pg_field_size</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">, </span><span style="color: #0000BB">$j</span><span style="color: #007700">).</span><span style="color: #DD0000">" bytes\n"</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">"field type: "</span><span style="color: #007700">.</span><span style="color: #0000BB">pg_field_type</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">, </span><span style="color: #0000BB">$j</span><span style="color: #007700">).</span><span style="color: #DD0000">" \n\n"</span><span style="color: #007700">;<br />}<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
<div class="example-contents"><p>
|
|
上例的输出如下：
|
|
</p></div>
|
|
<div class="example-contents screen">
|
|
<div class="cdata"><pre>
|
|
column 0
|
|
fieldname: author
|
|
printed length: 6 characters
|
|
storage length: -1 bytes
|
|
field type: varchar
|
|
|
|
column 1
|
|
fieldname: year
|
|
printed length: 4 characters
|
|
storage length: 2 bytes
|
|
field type: int2
|
|
|
|
column 2
|
|
fieldname: title
|
|
printed length: 24 characters
|
|
storage length: -1 bytes
|
|
field type: varchar
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
</p>
|
|
<blockquote class="note"><p><strong class="note">Note</strong>:
|
|
<p class="para">
|
|
本函数以前的名字为 <em>pg_fieldname()</em>。
|
|
</p>
|
|
</p></blockquote>
|
|
<p class="para">
|
|
参见 <span class="function"><a href="pg_field_num.html" class="function">pg_field_num()</a></span>。
|
|
</p>
|
|
</div>
|
|
|
|
</div></div></div></body></html> |