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124 lines
6.8 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>向 PostgreSQL 后端发送以 NULL 结尾的字符串</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-put-line" class="refentry">
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<div class="refnamediv">
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<h1 class="refname">pg_put_line</h1>
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<p class="verinfo">(PHP 4 >= 4.0.3, PHP 5, PHP 7)</p><p class="refpurpose"><span class="refname">pg_put_line</span> — <span class="dc-title">向 PostgreSQL 后端发送以 NULL 结尾的字符串</span></p>
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</div>
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<div class="refsect1 description" id="refsect1-function.pg-put-line-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>pg_put_line</strong></span>
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([ <span class="methodparam"><span class="type">resource</span> <code class="parameter">$connection</code></span>
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], <span class="methodparam"><span class="type">string</span> <code class="parameter">$data</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_put_line()</strong></span> 向 PostgreSQL 后端服务器发送以 NULL 结尾的字符串。例如可以通过 PostgreSQL 的 <em>COPY</em> 操作来向表中高速插入数据。结尾的 NULL 字符会自动加入。
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</p>
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<p class="para"><em>COPY</em> is a high-speed data loading interface
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supported by PostgreSQL. Data is passed in without being parsed,
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and in a single transaction.
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</p>
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<p class="para">
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An alternative to using raw <span class="function"><strong>pg_put_line()</strong></span> commands
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is to use <span class="function"><a href="pg_copy_from.html" class="function">pg_copy_from()</a></span>. This is a far simpler
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interface.
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</p>
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<blockquote class="note"><p><strong class="note">Note</strong>:
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<p class="para">
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应用程序必须明确地在 <span class="function"><a href="pg_end_copy.html" class="function">pg_end_copy()</a></span> 之前最后一行发送两个字符 "\." 来向后端指明发送数据结束。
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</p>
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</p></blockquote>
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<div class="warning"><strong class="warning">Warning</strong>
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<p class="para">
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Use of the <span class="function"><strong>pg_put_line()</strong></span> causes most large object
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operations, including <span class="function"><a href="pg_lo_read.html" class="function">pg_lo_read()</a></span> and
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<span class="function"><a href="pg_lo_tell.html" class="function">pg_lo_tell()</a></span>, to subsequently fail. You can use
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<span class="function"><a href="pg_copy_from.html" class="function">pg_copy_from()</a></span> and <span class="function"><a href="pg_copy_to.html" class="function">pg_copy_to()</a></span>
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instead.
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</p>
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</div>
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</div>
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<div class="refsect1 parameters" id="refsect1-function.pg-put-line-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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PostgreSQL database connection resource. When
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<code class="parameter">connection</code> is not present, the default connection
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is used. The default connection is the last connection made by
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<span class="function"><a href="pg_connect.html" class="function">pg_connect()</a></span> or <span class="function"><a href="pg_pconnect.html" class="function">pg_pconnect()</a></span>.
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</p>
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</dd>
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<dt>
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<code class="parameter">data</code></dt>
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<dd>
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<p class="para">
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A line of text to be sent directly to the PostgreSQL backend. A <em>NULL</em>
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terminator is added automatically.
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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.pg-put-line-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.pg-put-line-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-2511">
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<p><strong>Example #1 <span class="function"><strong>pg_put_line()</strong></span> 例子</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 /> $conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=foo"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"create table bar (a int4, b char(16), d float8)"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"copy bar from stdin"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_put_line</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"3\thello world\t4.5\n"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_put_line</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"4\tgoodbye world\t7.11\n"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_put_line</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"\.\n"</span><span style="color: #007700">);<br /> </span><span style="color: #0000BB">pg_end_copy</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</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>
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</div>
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<div class="refsect1 seealso" id="refsect1-function.pg-put-line-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="pg_end_copy.html" class="function" rel="rdfs-seeAlso">pg_end_copy()</a> - 与 PostgreSQL 后端同步</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> |