mirror of
https://github.com/fofolee/uTools-Manuals.git
synced 2025-06-17 21:16:57 +08:00
119 lines
13 KiB
HTML
119 lines
13 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>Read from BLOB/CLOB data</title>
|
|
</head>
|
|
<body class="docs"><div id="layout">
|
|
<div id="layout-content"><div id="function.cubrid-lob2-read" class="refentry">
|
|
<div class="refnamediv">
|
|
<h1 class="refname">cubrid_lob2_read</h1>
|
|
<p class="verinfo">(PECL CUBRID >= 8.4.1)</p><p class="refpurpose"><span class="refname">cubrid_lob2_read</span> — <span class="dc-title">Read from BLOB/CLOB data</span></p>
|
|
|
|
</div>
|
|
|
|
<div class="refsect1 description" id="refsect1-function.cubrid-lob2-read-description">
|
|
<h3 class="title">说明</h3>
|
|
<div class="methodsynopsis dc-description">
|
|
<span class="methodname"><strong>cubrid_lob2_read</strong></span>
|
|
( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$lob_identifier</code></span>
|
|
, <span class="methodparam"><span class="type">int</span> <code class="parameter">$len</code></span>
|
|
) : <span class="type">string</span></div>
|
|
|
|
<p class="para rdfs-comment">
|
|
The <span class="function"><strong>cubrid_lob2_read()</strong></span> function reads <code class="parameter">len</code> bytes from the
|
|
LOB data and returns the bytes read.
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 parameters" id="refsect1-function.cubrid-lob2-read-parameters">
|
|
<h3 class="title">参数</h3>
|
|
<p class="para">
|
|
<dl>
|
|
|
|
|
|
<dt>
|
|
<code class="parameter">lob_identifier</code></dt>
|
|
|
|
<dd>
|
|
|
|
<p class="para">Lob identifier as a result of <span class="function"><a href="cubrid_lob2_new.html" class="function">cubrid_lob2_new()</a></span> or get from the result set.</p>
|
|
</dd>
|
|
|
|
|
|
|
|
<dt>
|
|
<code class="parameter">len</code></dt>
|
|
|
|
<dd>
|
|
|
|
<p class="para">Length from buffer you want to read from the lob data.</p>
|
|
</dd>
|
|
|
|
|
|
</dl>
|
|
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 returnvalues" id="refsect1-function.cubrid-lob2-read-returnvalues">
|
|
<h3 class="title">返回值</h3>
|
|
<p class="para">
|
|
Returns the contents as a string.
|
|
</p>
|
|
<p class="para">
|
|
<strong><code>FALSE</code></strong> when there is no more data.
|
|
</p>
|
|
<p class="para">
|
|
NULL on failure.
|
|
</p>
|
|
<p class="para">
|
|
</p>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 examples" id="refsect1-function.cubrid-lob2-read-examples">
|
|
<h3 class="title">范例</h3>
|
|
<div class="example" id="example-1127">
|
|
<p><strong>Example #1 <span class="function"><strong>cubrid_lob2_read()</strong></span> example 1</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// test_lob (id INT, contents CLOB)<br /><br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #0000BB">33000</span><span style="color: #007700">, </span><span style="color: #DD0000">"demodb"</span><span style="color: #007700">, </span><span style="color: #DD0000">"public"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"select * from test_lob"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_fetch_row</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_LOB</span><span style="color: #007700">);<br /><br />print </span><span style="color: #DD0000">"position now is " </span><span style="color: #007700">. </span><span style="color: #0000BB">cubrid_lob2_tell</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">cubrid_lob2_seek</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">10</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_CURSOR_FIRST</span><span style="color: #007700">);<br /><br />print </span><span style="color: #DD0000">"\nposition after moving farword is " </span><span style="color: #007700">. </span><span style="color: #0000BB">cubrid_lob2_tell</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_lob2_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">12</span><span style="color: #007700">);<br /><br />print </span><span style="color: #DD0000">"\nposition after reading is " </span><span style="color: #007700">. </span><span style="color: #0000BB">cubrid_lob2_tell</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br />print </span><span style="color: #0000BB">$data </span><span style="color: #007700">. </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">cubrid_lob2_seek</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">5</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_CURSOR_CURRENT</span><span style="color: #007700">);<br /><br />print </span><span style="color: #DD0000">"\nposition after moving again is " </span><span style="color: #007700">. </span><span style="color: #0000BB">cubrid_lob2_tell</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">]) . </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_lob2_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">20</span><span style="color: #007700">);<br />print </span><span style="color: #0000BB">$data </span><span style="color: #007700">. </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #0000BB">cubrid_disconnect</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
</div>
|
|
|
|
<div class="example" id="example-1128">
|
|
<p><strong>Example #2 <span class="function"><strong>cubrid_lob2_read()</strong></span> example 2</strong></p>
|
|
<div class="example-contents">
|
|
<div class="phpcode"><pre><span style="color: #000000">
|
|
<span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// test_lob (id INT, contents CLOB)<br /><br /></span><span style="color: #0000BB">$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #0000BB">33000</span><span style="color: #007700">, </span><span style="color: #DD0000">"demodb"</span><span style="color: #007700">, </span><span style="color: #DD0000">"dba"</span><span style="color: #007700">, </span><span style="color: #DD0000">""</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$req </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"select * from test_lob"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$row </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_fetch_row</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_LOB</span><span style="color: #007700">);<br /><br />while (</span><span style="color: #0000BB">true</span><span style="color: #007700">) {<br /> if (</span><span style="color: #0000BB">$data </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_lob2_read</span><span style="color: #007700">(</span><span style="color: #0000BB">$row</span><span style="color: #007700">[</span><span style="color: #0000BB">1</span><span style="color: #007700">], </span><span style="color: #0000BB">1024</span><span style="color: #007700">)) {<br /> print </span><span style="color: #0000BB">$data </span><span style="color: #007700">. </span><span style="color: #DD0000">"\n"</span><span style="color: #007700">;<br /> }<br /> elseif (</span><span style="color: #0000BB">$data </span><span style="color: #007700">=== </span><span style="color: #0000BB">false</span><span style="color: #007700">) {<br /> print </span><span style="color: #DD0000">"There is no more data\n"</span><span style="color: #007700">;<br /> break;<br /> }<br /> else {<br /> print </span><span style="color: #DD0000">"There must some errors\n"</span><span style="color: #007700">;<br /> break;<br /> }<br />}<br /><br /></span><span style="color: #0000BB">cubrid_disconnect</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
|
|
</span>
|
|
</pre></div>
|
|
</div>
|
|
|
|
</div>
|
|
</div>
|
|
|
|
|
|
<div class="refsect1 seealso" id="refsect1-function.cubrid-lob2-read-seealso">
|
|
<h3 class="title">参见</h3>
|
|
<p class="para">
|
|
<ul class="simplelist">
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_write.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_write()</a> - Write to a lob object</span></li>
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_seek.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_seek()</a> - Move the cursor of a lob object</span></li>
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_seek64.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_seek64()</a> - Move the cursor of a lob object</span></li>
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_tell.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_tell()</a> - Tell the cursor position of the LOB object</span></li>
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_tell64.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_tell64()</a> - Tell the cursor position of the LOB object</span></li>
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_size.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_size()</a> - Get a lob object's size</span></li>
|
|
<li class="member"><span class="function"><a href="cubrid_lob2_size64.html" class="function" rel="rdfs-seeAlso">cubrid_lob2_size64()</a> - Get a lob object's size</span></li>
|
|
</ul>
|
|
</p>
|
|
</div>
|
|
|
|
|
|
</div></div></div></body></html> |