function.mssql-fetch-field.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 field information</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.mssql-fetch-batch.html">mssql_fetch_batch</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mssql-fetch-object.html">mssql_fetch_object</a></div> <div class="up"><a href="ref.mssql.html">Mssql Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.mssql-fetch-field" class="refentry"> <div class="refnamediv"> <h1 class="refname">mssql_fetch_field</h1> <p class="verinfo">(PHP 4, PHP 5, PECL odbtp:1.1.1-1.1.4)</p><p class="refpurpose"><span class="refname">mssql_fetch_field</span> — <span class="dc-title">Get field information</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">object</span> <span class="methodname"><b><b>mssql_fetch_field</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>mssql_fetch_field()</b> can be used in order to obtain information about fields in a certain query result. </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 resource that is being evaluated. This result comes from a call to <a href="function.mssql-query.html" class="function">mssql_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. If the field offset is not specified, the next field that was not yet retrieved by this function is retrieved. The <i><tt class="parameter">field_offset</tt></i> starts at 0. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns an object containing field information. </p> <p class="para"> The properties of the object are: </p> <ul class="itemizedlist"> <li class="listitem"> <span class="simpara"> name - column name. if the column is a result of a function, this property is set to computed#N, where #N is a serial number. </span> </li> <li class="listitem"> <span class="simpara"> column_source - the table from which the column was taken </span> </li> <li class="listitem"> <span class="simpara"> max_length - maximum length of the column </span> </li> <li class="listitem"> <span class="simpara"> numeric - 1 if the column is numeric </span> </li> <li class="listitem"> <span class="simpara"> type - the column type. </span> </li> </ul> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>mssql_fetch_field()</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">// Connect MSSQL<br /></span><span style="color: #0000BB">mssql_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'MANGO\SQLEXPRESS'</span><span style="color: #007700">, </span><span style="color: #DD0000">'sa'</span><span style="color: #007700">, </span><span style="color: #DD0000">'phpfi'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">mssql_select_db</span><span style="color: #007700">(</span><span style="color: #DD0000">'php'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Send a select query to MSSQL<br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #0000BB">mssql_query</span><span style="color: #007700">(</span><span style="color: #DD0000">'SELECT * FROM [php].[dbo].[persons]'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Construct table<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'<h3>Table structure for \'persons\'</h3>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'<table border="1">'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Table header<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'<thead>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'<tr>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'<td>Field name</td>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'<td>Data type</td>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'<td>Max length</td>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'</tr>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'</thead>'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Dump all fields<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">'<tbody>'</span><span style="color: #007700">;<br /><br />for(</span><span style="color: #0000BB">$i </span><span style="color: #007700">= </span><span style="color: #0000BB">0</span><span style="color: #007700">; </span><span style="color: #0000BB">$i </span><span style="color: #007700">< </span><span style="color: #0000BB">mssql_num_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">); ++</span><span style="color: #0000BB">$i</span><span style="color: #007700">)<br />{<br /> </span><span style="color: #FF8000">// Fetch the field information<br /> </span><span style="color: #0000BB">$field </span><span style="color: #007700">= </span><span style="color: #0000BB">mssql_fetch_field</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">, </span><span style="color: #0000BB">$i</span><span style="color: #007700">);<br /><br /> </span><span style="color: #FF8000">// Print the row<br /> </span><span style="color: #007700">echo </span><span style="color: #DD0000">'<tr>'</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">'<td>' </span><span style="color: #007700">. </span><span style="color: #0000BB">$field</span><span style="color: #007700">-></span><span style="color: #0000BB">name </span><span style="color: #007700">. </span><span style="color: #DD0000">'</td>'</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">'<td>' </span><span style="color: #007700">. </span><span style="color: #0000BB">strtoupper</span><span style="color: #007700">(</span><span style="color: #0000BB">$field</span><span style="color: #007700">-></span><span style="color: #0000BB">type</span><span style="color: #007700">) . </span><span style="color: #DD0000">'</td>'</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">'<td>' </span><span style="color: #007700">. </span><span style="color: #0000BB">$field</span><span style="color: #007700">-></span><span style="color: #0000BB">max_length </span><span style="color: #007700">. </span><span style="color: #DD0000">'</td>'</span><span style="color: #007700">;<br /> echo </span><span style="color: #DD0000">'</tr>'</span><span style="color: #007700">;<br />}<br /><br />echo </span><span style="color: #DD0000">'</tbody>'</span><span style="color: #007700">;<br />echo </span><span style="color: #DD0000">'</table>'</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Free the query result<br /></span><span style="color: #0000BB">mssql_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.mssql-field-seek.html" class="function" rel="rdfs-seeAlso">mssql_field_seek()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.mssql-fetch-batch.html">mssql_fetch_batch</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.mssql-fetch-object.html">mssql_fetch_object</a></div> <div class="up"><a href="ref.mssql.html">Mssql 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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