mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-18 05:26:57 +08:00
138 lines
14 KiB
HTML
138 lines
14 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>Returns an array of resources representing the fields in a result set</title>
|
|
</head>
|
|
<body class="docs"><div id="layout">
|
|
<div id="layout-content"><div id="function.maxdb-fetch-fields" class="refentry">
|
|
<div class="refnamediv">
|
|
<h1 class="refname">maxdb_fetch_fields</h1>
|
|
<h1 class="refname">maxdb_result::fetch_fields</h1>
|
|
<p class="verinfo">(PECL maxdb >= 1.0)</p><p class="refpurpose"><span class="refname">maxdb_fetch_fields</span> -- <span class="refname">maxdb_result::fetch_fields</span> — <span class="dc-title">Returns an array of resources representing the fields in a result set</span></p>
|
|
|
|
</div>
|
|
|
|
<div class="refsect1 description" id="refsect1-function.maxdb-fetch-fields-description">
|
|
<h3 class="title">说明</h3>
|
|
<p class="para">过程化风格</p>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>maxdb_fetch_fields</strong></span>
|
|
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$result</code></span>
|
|
) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>
|
|
|
|
<p class="para rdfs-comment">面向对象风格</p>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>maxdb_result::fetch_fields</strong></span>
|
|
( <span class="methodparam">void</span>
|
|
) : <span class="type"><a href="language.pseudo-types.html#language.types.mixed" class="type mixed">mixed</a></span></div>
|
|
|
|
<p class="para rdfs-comment">
|
|
This function serves an identical purpose to the <span class="function"><a href="maxdb_fetch_field.html" class="function">maxdb_fetch_field()</a></span>
|
|
function with the single difference that, instead of returning one resource at a time for
|
|
each field, the columns are returned as an array of resources.
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 returnvalues" id="refsect1-function.maxdb-fetch-fields-returnvalues">
|
|
<h3 class="title">返回值</h3>
|
|
<p class="para">
|
|
Returns an array of resources which contains field definition information or <strong><code>FALSE</code></strong> if no field information
|
|
is available.
|
|
</p>
|
|
<p class="para">
|
|
<table class="doctable table">
|
|
<caption><strong>Object properties</strong></caption>
|
|
|
|
<thead>
|
|
<tr>
|
|
<th>Property</th>
|
|
<th>Description</th>
|
|
</tr>
|
|
|
|
</thead>
|
|
|
|
<tbody class="tbody">
|
|
<tr>
|
|
<td>name</td>
|
|
<td>The name of the column</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>max_length</td>
|
|
<td>The maximum width of the field for the result set.</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>type</td>
|
|
<td>The data type used for this field</td>
|
|
</tr>
|
|
|
|
<tr>
|
|
<td>decimals</td>
|
|
<td>The number of decimals used (for integer fields)</td>
|
|
</tr>
|
|
|
|
</tbody>
|
|
|
|
</table>
|
|
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 examples" id="refsect1-function.maxdb-fetch-fields-examples">
|
|
<h3 class="title">范例</h3>
|
|
<div class="example" id="example-1351">
|
|
<p><strong>Example #1 面向对象风格</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br />$maxdb </span><span style="color: #007700">= new </span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #DD0000">"SELECT name, cno from hotel.customer ORDER BY cno"</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">)) {<br /><br /> </span><span style="color: #FF8000">/* Get field information for all columns */<br /> </span><span style="color: #0000BB">$finfo </span><span style="color: #007700">= </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">fetch_fields</span><span style="color: #007700">();<br /><br /> foreach (</span><span style="color: #0000BB">$finfo </span><span style="color: #007700">as </span><span style="color: #0000BB">$val</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Name: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">name</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Table: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">table</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"max. Len: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">max_length</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Flags: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">flags</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Type: %d\n\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">type</span><span style="color: #007700">);<br /> }<br /> </span><span style="color: #0000BB">$result</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br />}<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
</div>
|
|
<div class="example" id="example-1352">
|
|
<p><strong>Example #2 过程化风格</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #DD0000">"SELECT name, cno from hotel.customer ORDER BY cno"</span><span style="color: #007700">;<br /><br />if (</span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #0000BB">$query</span><span style="color: #007700">)) {<br /><br /> </span><span style="color: #FF8000">/* Get field information for all columns */<br /> </span><span style="color: #0000BB">$finfo </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_fetch_fields</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /> foreach (</span><span style="color: #0000BB">$finfo </span><span style="color: #007700">as </span><span style="color: #0000BB">$val</span><span style="color: #007700">) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Name: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">name</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Table: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">table</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"max. Len: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">max_length</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Flags: %d\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">flags</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Type: %d\n\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$val</span><span style="color: #007700">-></span><span style="color: #0000BB">type</span><span style="color: #007700">);<br /> }<br /> </span><span style="color: #0000BB">maxdb_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
</div>
|
|
<p class="para">以上例程的输出类似于：</p>
|
|
<div class="example-contents screen">
|
|
<div class="cdata"><pre>
|
|
Name: NAME
|
|
Table:
|
|
max. Len: 10
|
|
Flags: -1
|
|
Type: 2
|
|
|
|
Name: CNO
|
|
Table:
|
|
max. Len: 4
|
|
Flags: -1
|
|
Type: 0
|
|
</pre></div>
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 seealso" id="refsect1-function.maxdb-fetch-fields-seealso">
|
|
<h3 class="title">参见</h3>
|
|
<p class="para">
|
|
<ul class="simplelist">
|
|
<li class="member"><span class="function"><a href="maxdb_num_fields.html" class="function" rel="rdfs-seeAlso">maxdb_num_fields()</a> - Get the number of fields in a result</span></li>
|
|
<li class="member"><span class="function"><a href="maxdb_fetch_field.html" class="function" rel="rdfs-seeAlso">maxdb_fetch_field()</a> - Returns the next field in the result set</span></li>
|
|
<li class="member"><span class="function"><a href="maxdb_fetch_field_direct.html" class="function" rel="rdfs-seeAlso">maxdb_fetch_field_direct()</a> - Fetch meta-data for a single field</span></li>
|
|
</ul>
|
|
</p>
|
|
</div>
|
|
|
|
|
|
</div></div></div></body></html> |