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104 lines
6.6 KiB
HTML
104 lines
6.6 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>Check whether the instance pointed by OID exists</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.cubrid-is-instance" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">cubrid_is_instance</h1>
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<p class="verinfo">(PECL CUBRID >= 8.3.0)</p><p class="refpurpose"><span class="refname">cubrid_is_instance</span> — <span class="dc-title">Check whether the instance pointed by OID exists</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.cubrid-is-instance-description">
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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>cubrid_is_instance</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$conn_identifier</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$oid</code></span>
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) : <span class="type">int</span></div>
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<p class="para rdfs-comment">
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The <span class="function"><strong>cubrid_is_instance()</strong></span> function is used to check
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whether the instance pointed by the given <code class="parameter">oid</code>
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exists or not.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.cubrid-is-instance-parameters">
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<h3 class="title">参数</h3>
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<p class="para">
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<dl>
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<dt>
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<code class="parameter">conn_identifier</code></dt>
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<dd>
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<p class="para">Connection identifier.</p></dd>
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<dt>
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<code class="parameter">oid</code></dt>
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<dd>
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<p class="para">OID of the instance that you want to check the existence.</p></dd>
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</dl>
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.cubrid-is-instance-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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1, if such instance exists;
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</p>
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<p class="para">
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0, if such instance does not exist;
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</p>
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<p class="para">
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-1, in case of error
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.cubrid-is-instance-examples">
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<h3 class="title">范例</h3>
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<div class="example" id="example-1118">
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<p><strong>Example #1 <span class="function"><strong>cubrid_is_instance()</strong></span> example</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 />$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #0000BB">33000</span><span style="color: #007700">, </span><span style="color: #DD0000">"demodb"</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$sql </span><span style="color: #007700">= <<<EOD<br /></span><span style="color: #DD0000">SELECT host_year, medal, game_date <br />FROM game <br />WHERE athlete_code IN <br /> (SELECT code FROM athlete WHERE name='Thorpe Ian');<br /></span><span style="color: #007700">EOD;<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: #0000BB">$sql</span><span style="color: #007700">, </span><span style="color: #0000BB">CUBRID_INCLUDE_OID</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">$oid </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_current_oid</span><span style="color: #007700">(</span><span style="color: #0000BB">$req</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">$res </span><span style="color: #007700">= </span><span style="color: #0000BB">cubrid_is_instance </span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #0000BB">$oid</span><span style="color: #007700">);<br />if (</span><span style="color: #0000BB">$res </span><span style="color: #007700">== </span><span style="color: #0000BB">1</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"Instance pointed by </span><span style="color: #0000BB">$oid</span><span style="color: #DD0000"> exists.\n"</span><span style="color: #007700">;<br />} else if (</span><span style="color: #0000BB">$res </span><span style="color: #007700">== </span><span style="color: #0000BB">0</span><span style="color: #007700">){<br /> echo </span><span style="color: #DD0000">"Instance pointed by </span><span style="color: #0000BB">$oid</span><span style="color: #DD0000"> doesn't exist.\n"</span><span style="color: #007700">;<br />} else {<br /> echo </span><span style="color: #DD0000">"error\n"</span><span style="color: #007700">;<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>
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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>以上例程会输出：</p></div>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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Instance pointed by @0|0|0 doesn't exist.
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</pre></div>
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</div>
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</div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.cubrid-is-instance-seealso">
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<h3 class="title">参见</h3>
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<p class="para">
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<ul class="simplelist">
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<li class="member"><span class="function"><a href="cubrid_drop.html" class="function" rel="rdfs-seeAlso">cubrid_drop()</a> - Delete an instance using OID</span></li>
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<li class="member"><span class="function"><a href="cubrid_get_class_name.html" class="function" rel="rdfs-seeAlso">cubrid_get_class_name()</a> - Get the class name using OID</span></li>
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</ul>
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</p>
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</div>
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</div></div></div></body></html> |