📄 function.mysql-field-name.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Get the name of the specified field in a result</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-field-len.html">mysql_field_len</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-field-seek.html">mysql_field_seek</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.mysql-field-name" class="refentry"> <div class="refnamediv"> <h1 class="refname">mysql_field_name</h1> <p class="verinfo">(PHP 4, PHP 5, PECL mysql:1.0)</p><p class="refpurpose"><span class="refname">mysql_field_name</span> — <span class="dc-title">Get the name of the specified field in a result</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">string</span> <span class="methodname"><b><b>mysql_field_name</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$result</tt></span> , <span class="methodparam"><span class="type">int</span> <tt class="parameter">$field_offset</tt></span> )</div> <p class="para rdfs-comment"> <b>mysql_field_name()</b> returns the name of the specified field index. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt><span class="term"><i><tt class="parameter">result</tt></i></span><dd><p class="para">The result <a href="language.types.resource.html" class="type resource">resource</a> thatis being evaluated. This result comes from a call to <a href="function.mysql-query.html" class="function">mysql_query()</a>.</p></dd></dt> <dt><span class="term"><i><tt class="parameter">field_offset</tt></i></span><dd><p class="para">The numerical field offset. The <i><tt class="parameter">field_offset</tt></i> starts at <i>0</i>. If <i><tt class="parameter">field_offset</tt></i> does not exist, an error of level<b><tt>E_WARNING</tt></b> is also issued.</p></dd></dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> The name of the specified field index on success, or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>mysql_field_name()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">/* The users table consists of three fields:<br />* user_id<br />* username<br />* password.<br />*/<br /></span><span style="color: #0000BB">$link </span><span style="color: #007700">= @</span><span style="color: #0000BB">mysql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'localhost'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_user'</span><span style="color: #007700">, </span><span style="color: #DD0000">'mysql_password'</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$link</span><span style="color: #007700">) {<br /> die(</span><span style="color: #DD0000">'Could not connect to MySQL server: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /></span><span style="color: #0000BB">$dbname </span><span style="color: #007700">= </span><span style="color: #DD0000">'mydb'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$db_selected </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_select_db</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbname</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$db_selected</span><span style="color: #007700">) {<br /> die(</span><span style="color: #DD0000">"Could not set $dbname: " </span><span style="color: #007700">. </span><span style="color: #0000BB">mysql_error</span><span style="color: #007700">());<br />}<br /></span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">mysql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">'select * from users'</span><span style="color: #007700">, </span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /><br />echo </span><span style="color: #0000BB">mysql_field_name</span><span style="color: #007700">(</span><span style="color: #0000BB">$res</span><span style="color: #007700">, </span><span style="color: #0000BB">0</span><span style="color: #007700">) . </span><span style="color: #DD0000">"\n"</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">$res</span><span style="color: #007700">, </span><span style="color: #0000BB">2</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> <div class="example-contents"><p>The above example will output:</p></div> <div class="example-contents"><pre><div class="cdata"><pre>user_idpassword</pre></div> </pre></div> </div> </p> </div> <div class="refsect1 notes"> <h3 class="title">Notes</h3> <blockquote><p><b class="note">Note</b>: <span class="simpara">Field names returned by this functionare <em class="emphasis">case-sensitive</em>.</span></p></blockquote> <blockquote><p><b class="note">Note</b>: For backward compatibility, the following deprecated alias may be used: <b>mysql_fieldname()</b> <br /> </p></blockquote> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.mysql-field-type.html" class="function" rel="rdfs-seeAlso">mysql_field_type()</a></li> <li class="member"><a href="function.mysql-field-len.html" class="function" rel="rdfs-seeAlso">mysql_field_len()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mysql-field-len.html">mysql_field_len</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mysql-field-seek.html">mysql_field_seek</a></div> <div class="up"><a href="ref.mysql.html">MySQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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