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91 lines
8.2 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>Returns a string description of the last error</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.maxdb-error" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">maxdb_error</h1>
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<h1 class="refname">maxdb::error</h1>
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<p class="verinfo">(PECL maxdb >= 1.0)</p><p class="refpurpose"><span class="refname">maxdb_error</span> -- <span class="refname">maxdb::error</span> — <span class="dc-title">Returns a string description of the last error</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.maxdb-error-description">
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<h3 class="title">说明</h3>
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<p class="para">过程化风格</p>
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<div class="methodsynopsis dc-description">
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<span class="methodname"><strong>maxdb_error</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$link</code></span>
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) : <span class="type">string</span></div>
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<p class="para rdfs-comment">面向对象风格</p>
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<div class="fieldsynopsis"><span class="type">string</span> <var class="varname">$maxdb->error</var>;</div>
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<p class="para">
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The <span class="function"><strong>maxdb_error()</strong></span> function is identical to the corresponding
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<span class="function"><a href="maxdb_errno.html" class="function">maxdb_errno()</a></span> function in every way, except instead of returning
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an integer error code the <span class="function"><strong>maxdb_error()</strong></span> function will return
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a string representation of the last error to occur for the database connection
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represented by the <code class="parameter">link</code> parameter. If no error has occurred,
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this function will return an empty string.
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</p>
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</div>
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<div class="refsect1 returnvalues" id="refsect1-function.maxdb-error-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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A string that describes the error. An empty string if no error occurred.
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.maxdb-error-examples">
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<h3 class="title">范例</h3>
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<div class="example" id="example-1341">
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<p><strong>Example #1 面向对象风格</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 />$maxdb </span><span style="color: #007700">= new </span><span style="color: #0000BB">maxdb</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br />if (!</span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">query</span><span style="color: #007700">(</span><span style="color: #DD0000">"SELECT xxx FROM hotel.city"</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Errormessage: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">error</span><span style="color: #007700">);<br />}<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">$maxdb</span><span style="color: #007700">-></span><span style="color: #0000BB">close</span><span style="color: #007700">();<br /></span><span style="color: #0000BB">?></span>
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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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<div class="example" id="example-1342">
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<p><strong>Example #2 过程化风格</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 />$link </span><span style="color: #007700">= </span><span style="color: #0000BB">maxdb_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"localhost"</span><span style="color: #007700">, </span><span style="color: #DD0000">"MONA"</span><span style="color: #007700">, </span><span style="color: #DD0000">"RED"</span><span style="color: #007700">, </span><span style="color: #DD0000">"DEMODB"</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">/* check connection */<br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">maxdb_connect_errno</span><span style="color: #007700">()) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Connect failed: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_connect_error</span><span style="color: #007700">());<br /> exit();<br />}<br /><br />if (!</span><span style="color: #0000BB">maxdb_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT xxx FROM hotel.city"</span><span style="color: #007700">)) {<br /> </span><span style="color: #0000BB">printf</span><span style="color: #007700">(</span><span style="color: #DD0000">"Errormessgae: %s\n"</span><span style="color: #007700">, </span><span style="color: #0000BB">maxdb_error</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">));<br />}<br /><br /></span><span style="color: #FF8000">/* close connection */<br /></span><span style="color: #0000BB">maxdb_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$link</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span>
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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 class="para">以上例程的输出类似于：</p>
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<div class="example-contents screen">
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<div class="cdata"><pre>
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PHP Warning: maxdb_query(): -4005 POS(8) Unknown column name:XXX [42000]
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Errormessgae: POS(8) Unknown column name:XXX
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</pre></div>
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</div>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.maxdb-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="maxdb_connect_errno.html" class="function" rel="rdfs-seeAlso">maxdb_connect_errno()</a> - Returns the error code from last connect call</span></li>
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<li class="member"><span class="function"><a href="maxdb_connect_error.html" class="function" rel="rdfs-seeAlso">maxdb_connect_error()</a> - Returns a string description of the last connect error</span></li>
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<li class="member"><span class="function"><a href="maxdb_errno.html" class="function" rel="rdfs-seeAlso">maxdb_errno()</a> - Returns the error code for the most recent function call</span></li>
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<li class="member"><span class="function"><a href="maxdb_sqlstate.html" class="function" rel="rdfs-seeAlso">maxdb_sqlstate()</a> - Returns the SQLSTATE error from previous MaxDB 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> |