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121 lines
5.9 KiB
HTML
121 lines
5.9 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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<meta http-equiv="content-type" content="text/html; charset=UTF-8">
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<title>Returns a string containing the SQLSTATE returned by the last connection attempt</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.db2-conn-error" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">db2_conn_error</h1>
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<p class="verinfo">(PECL ibm_db2 >= 1.0.0)</p><p class="refpurpose"><span class="refname">db2_conn_error</span> — <span class="dc-title">
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Returns a string containing the SQLSTATE returned by the last connection attempt
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</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.db2-conn-error-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>db2_conn_error</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="type">string</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>db2_conn_error()</strong></span> returns an SQLSTATE value representing
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the reason the last attempt to connect to a database failed. As
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<span class="function"><a href="db2_connect.html" class="function">db2_connect()</a></span> returns <strong><code>FALSE</code></strong> in the event of a failed
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connection attempt, you do not pass any parameters to
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<span class="function"><strong>db2_conn_error()</strong></span> to retrieve the SQLSTATE value.
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</p>
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<p class="para">
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If, however, the connection was successful but becomes invalid over time,
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you can pass the <code class="parameter">connection</code> parameter to retrieve
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the SQLSTATE value for a specific connection.
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</p>
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<p class="para">
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To learn what the SQLSTATE value means, you can issue the following command
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at a DB2 Command Line Processor prompt:
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<strong class="userinput"><code>db2 '? <code class="parameter">sqlstate-value</code>'</code></strong>. You
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can also call <span class="function"><a href="db2_conn_errormsg.html" class="function">db2_conn_errormsg()</a></span> to retrieve an
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explicit error message and the associated SQLCODE value.
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.db2-conn-error-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">
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A connection resource associated with a connection that initially
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succeeded, but which over time became invalid.
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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.db2-conn-error-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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Returns the SQLSTATE value resulting from a failed connection attempt.
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Returns an empty string if there is no error associated with the last
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connection attempt.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.db2-conn-error-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-1235">
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<p><strong>Example #1 Retrieving an SQLSTATE value for a failed connection attempt</strong></p>
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<div class="example-contents"><p>
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The following example demonstrates how to return an SQLSTATE value
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after deliberately passing invalid parameters to
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<span class="function"><a href="db2_connect.html" class="function">db2_connect()</a></span>.
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</p></div>
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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">db2_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">'badname'</span><span style="color: #007700">, </span><span style="color: #DD0000">'baduser'</span><span style="color: #007700">, </span><span style="color: #DD0000">'badpassword'</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">) {<br /> print </span><span style="color: #DD0000">"SQLSTATE value: " </span><span style="color: #007700">. </span><span style="color: #0000BB">db2_conn_error</span><span style="color: #007700">();<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 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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SQLSTATE value: 08001
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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 seealso" id="refsect1-function.db2-conn-error-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="db2_conn_errormsg.html" class="function" rel="rdfs-seeAlso">db2_conn_errormsg()</a> - Returns the last connection error message and SQLCODE value</span></li>
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<li class="member"><span class="function"><a href="db2_connect.html" class="function" rel="rdfs-seeAlso">db2_connect()</a> - Returns a connection to a database</span></li>
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<li class="member"><span class="function"><a href="db2_stmt_error.html" class="function" rel="rdfs-seeAlso">db2_stmt_error()</a> - Returns a string containing the SQLSTATE returned by an SQL statement</span></li>
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<li class="member"><span class="function"><a href="db2_stmt_errormsg.html" class="function" rel="rdfs-seeAlso">db2_stmt_errormsg()</a> - Returns a string containing the last SQL statement error message</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> |