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42 lines
2.8 KiB
HTML
42 lines
2.8 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>Ping 数据库连接</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.pg-ping" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_ping</h1>
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<p class="verinfo">(PHP 4 >= 4.3.0, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_ping</span> — <span class="dc-title">Ping 数据库连接</span></p>
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</div>
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<div class="refsect1 unknown-seealsp" id="refsect1-function.pg-ping-unknown-seealsp">
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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>pg_ping</strong></span>
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( <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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) : <span class="type">bool</span></div>
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<p class="para rdfs-comment">
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<span class="function"><strong>pg_ping()</strong></span> ping
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数据库连接，如果中断则尝试重新连接。如果连接在活动状态返回
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<strong><code>TRUE</code></strong>，否则返回 <strong><code>FALSE</code></strong>。
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</p>
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<p class="para">
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<div class="example" id="example-2509">
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<p><strong>Example #1 <span class="function"><strong>pg_ping()</strong></span></strong></p>
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<div class="example-contents">
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<div class="phpcode"><pre><span style="color: #000000">
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<span style="color: #0000BB"><?php <br />$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_pconnect </span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$conn</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"An error occured.\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br />if (!</span><span style="color: #0000BB">pg_ping</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">))<br /> die(</span><span style="color: #DD0000">"Connection is broken\n"</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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参见 <span class="function"><a href="pg_connection_status.html" class="function">pg_connection_status()</a></span> 和
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<span class="function"><a href="pg_connection_reset.html" class="function">pg_connection_reset()</a></span>。
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</p>
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</div>
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</div></div></div></body></html> |