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66 lines
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HTML
66 lines
5.2 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>列出 MySQL 结果中的字段</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.mysql-list-fields" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">mysql_list_fields</h1>
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<p class="verinfo">(PHP 4, PHP 5)</p><p class="refpurpose"><span class="refname">mysql_list_fields</span> — <span class="dc-title">列出 MySQL 结果中的字段</span></p>
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</div>
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<div class="refsect1 unknown-unknown-unknown-unknown-unknown-unknown-unknown-unknown-seealsw" id="refsect1-function.mysql-list-fields-unknown-unknown-unknown-unknown-unknown-unknown-unknown-unknown-seealsw">
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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>mysql_list_fields</strong></span>
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( <span class="methodparam"><span class="type">string</span> <code class="parameter">$database_name</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$table_name</code></span>
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[, <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link_identifier</code></span>
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] ) : <span class="type">resource</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>mysql_list_fields()</strong></span>
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取得给定表名的信息。参数是数据库名和表名。返回一个结果指针，可以用于
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<span class="function"><a href="mysql_field_flags.html" class="function">mysql_field_flags()</a></span>，<span class="function"><a href="mysql_field_len.html" class="function">mysql_field_len()</a></span>，<span class="function"><a href="mysql_field_name.html" class="function">mysql_field_name()</a></span> 和
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<span class="function"><a href="mysql_field_type.html" class="function">mysql_field_type()</a></span>。
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</p>
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<p class="para">
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<div class="example" id="example-2157">
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<p><strong>Example #1 <span class="function"><strong>mysql_list_fields()</strong></span> 例子</strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_password'</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$fields </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_list_fields</span><span style="color: #007700">(</span><span style="color: #DD0000">"database1"</span><span style="color: #007700">, </span><span style="color: #DD0000">"table1"</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$columns </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_num_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$fields</span><span style="color: #007700">);<br /><br />for (</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">$columns</span><span style="color: #007700">; </span><span style="color: #0000BB">$i</span><span style="color: #007700">++) {<br /> echo </span><span style="color: #0000BB">mysql_field_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$fields</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br />}</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>
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以上例子将产生如下输出：
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</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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field1
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field2
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field3
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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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<p class="para">
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为向下兼容仍然可以使用
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<span class="function"><strong>mysql_listfields()</strong></span>，但反对这样做。
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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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<span class="function"><strong>mysql_list_fields()</strong></span> 函数已过时。最好用
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<span class="function"><a href="mysql_query.html" class="function">mysql_query()</a></span> 来发出一条
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<em>SHOW COLUMNS FROM table [LIKE 'name']</em>
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的 SQL 语句来代替。
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</p>
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</p></blockquote>
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</div>
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</div></div></div></body></html> |