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127 lines
7.2 KiB
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<!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>Sets the client identifier</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.oci-set-client-identifier" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">oci_set_client_identifier</h1>
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<p class="verinfo">(PHP 5 >= 5.3.2, PHP 7, PECL OCI8 >= 1.4.0)</p><p class="refpurpose"><span class="refname">oci_set_client_identifier</span> — <span class="dc-title">Sets the client identifier</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.oci-set-client-identifier-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>oci_set_client_identifier</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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, <span class="methodparam"><span class="type">string</span> <code class="parameter">$client_identifier</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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Sets the client identifier used by various database components to
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identify lightweight application users who authenticate as the same
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database user.
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</p>
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<p class="para">
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The client identifier is registered with the database when the next
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'round-trip' from PHP to the database occurs, typically when an SQL
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statement is executed.
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</p>
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<p class="para">
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The identifier can subsequently be queried, for example
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with <em>SELECT SYS_CONTEXT('USERENV','CLIENT_IDENTIFIER')
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FROM DUAL</em>. Database administration views such
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as <em>V$SESSION</em> will also contain the value. It
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can be used with <em>DBMS_MONITOR.CLIENT_ID_TRACE_ENABLE</em>
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for tracing and can also be used for auditing.
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</p>
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<p class="para">
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The value may be retained across page requests that use the same persistent connection.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.oci-set-client-identifier-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">connection</code></dt>
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<dd>
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<p class="para">Oracle 连接标识，由
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<span class="function"><a href="oci_connect.html" class="function">oci_connect()</a></span>，<span class="function"><a href="oci_pconnect.html" class="function">oci_pconnect()</a></span>，或
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<span class="function"><a href="oci_new_connect.html" class="function">oci_new_connect()</a></span> 返回。</p>
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</dd>
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<dt>
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<code class="parameter">client_identifier</code></dt>
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<dd>
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<p class="para">
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User chosen string up to 64 bytes long.
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</p>
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</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.oci-set-client-identifier-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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成功时返回 <strong><code>TRUE</code></strong>， 或者在失败时返回 <strong><code>FALSE</code></strong>。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.oci-set-client-identifier-examples">
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<h3 class="title">范例</h3>
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<p class="para">
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<div class="example" id="example-2456">
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<p><strong>Example #1 Setting the client identifier to the application user</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 /><br /></span><span style="color: #FF8000">// Find the application user's login name<br /></span><span style="color: #0000BB">session_start</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">$un </span><span style="color: #007700">= </span><span style="color: #0000BB">my_validate_session</span><span style="color: #007700">(</span><span style="color: #0000BB">$_SESSION</span><span style="color: #007700">[</span><span style="color: #DD0000">'username'</span><span style="color: #007700">]);<br /></span><span style="color: #0000BB">$c </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'myschema'</span><span style="color: #007700">, </span><span style="color: #DD0000">'welcome'</span><span style="color: #007700">, </span><span style="color: #DD0000">'localhost/XE'</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Tell Oracle who that user is<br /></span><span style="color: #0000BB">oci_set_client_identifier</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #0000BB">$un</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// The next round-trip to the database will piggyback the identifier<br /></span><span style="color: #0000BB">$s </span><span style="color: #007700">= </span><span style="color: #0000BB">oci_parse</span><span style="color: #007700">(</span><span style="color: #0000BB">$c</span><span style="color: #007700">, </span><span style="color: #DD0000">'select mydata from mytable'</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">oci_execute</span><span style="color: #007700">(</span><span style="color: #0000BB">$s</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// ...<br /><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>
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</p>
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</div>
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<div class="refsect1 notes" id="refsect1-function.oci-set-client-identifier-notes">
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<h3 class="title">注释</h3>
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<div class="caution"><strong class="caution">Caution</strong><h1 class="title">Roundtrip Gotcha</h1>
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<p class="para">一些 OCI8 函数会导致 Roundtrips. 对数据库来说当启用结果缓存时，查询可能不产生Roundtrips。</p></div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.oci-set-client-identifier-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="oci_set_module_name.html" class="function" rel="rdfs-seeAlso">oci_set_module_name()</a> - Sets the module name</span></li>
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<li class="member"><span class="function"><a href="oci_set_action.html" class="function" rel="rdfs-seeAlso">oci_set_action()</a> - Sets the action name</span></li>
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<li class="member"><span class="function"><a href="oci_set_client_info.html" class="function" rel="rdfs-seeAlso">oci_set_client_info()</a> - Sets the client information</span></li>
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<li class="member"><span class="function"><a href="oci_set_db_operation.html" class="function" rel="rdfs-seeAlso">oci_set_db_operation()</a> - Sets the database operation</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> |