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89 lines
3.5 KiB
HTML
89 lines
3.5 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>GeoIP 数据库是否可用</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.geoip-db-avail" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">geoip_db_avail</h1>
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<p class="verinfo">(PECL geoip >= 1.0.1)</p><p class="refpurpose"><span class="refname">geoip_db_avail</span> — <span class="dc-title">GeoIP 数据库是否可用</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.geoip-db-avail-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>geoip_db_avail</strong></span>
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( <span class="methodparam"><span class="type">int</span> <code class="parameter">$database</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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<span class="function"><strong>geoip_db_avail()</strong></span> 函数返回 GeoI P数据库是否可以在磁盘上打开并且可用。
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</p>
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<p class="para">
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该函数不能用来判断是否是个合适的数据库，除非这个数据库可读。
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</p>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.geoip-db-avail-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">database</code></dt>
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<dd>
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<p class="para">
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变量类型为整型。你可以使用该扩展的<a href="geoip.constants.html" class="link">预定义常量</a>(比如: GEOIP_*_EDITION)。
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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.geoip-db-avail-returnvalues">
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<h3 class="title">返回值</h3>
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<p class="para">
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如果存在则返回 <strong><code>TRUE</code></strong> , 未找到则返回 <strong><code>FALSE</code></strong> , 错误则返回 <strong><code>NULL</code></strong> 。
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</p>
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</div>
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<div class="refsect1 examples" id="refsect1-function.geoip-db-avail-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-4488">
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<p><strong>Example #1 <span class="function"><strong>geoip_db_avail()</strong></span> 函数的使用范例：</strong></p>
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<div class="example-contents"><p>
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以下代码将会输出当前数据库的版本信息。
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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 /><br /></span><span style="color: #007700">if (</span><span style="color: #0000BB">geoip_db_avail</span><span style="color: #007700">(</span><span style="color: #0000BB">GEOIP_COUNTRY_EDITION</span><span style="color: #007700">))<br /> print </span><span style="color: #0000BB">geoip_database_info</span><span style="color: #007700">(</span><span style="color: #0000BB">GEOIP_COUNTRY_EDITION</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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GEO-106FREE 20080801 Build 1 Copyright (c) 2006 MaxMind LLC All Rights Reserved
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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></div></div></body></html> |