function.pg-put-line.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Send a NULL-terminated string to PostgreSQL backend</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-prepare.html">pg_prepare</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-query-params.html">pg_query_params</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.pg-put-line" class="refentry"> <div class="refnamediv"> <h1 class="refname">pg_put_line</h1> <p class="verinfo">(PHP 4 >= 4.0.3, PHP 5)</p><p class="refpurpose"><span class="refname">pg_put_line</span> — <span class="dc-title">Send a NULL-terminated string to PostgreSQL backend</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>pg_put_line</b></b></span> ( <span class="methodparam"><span class="type">string</span> <tt class="parameter">$data</tt></span> )</div> <div class="methodsynopsis dc-description"> <span class="type">bool</span> <span class="methodname"><b><b>pg_put_line</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$connection</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$data</tt></span> )</div> <p class="para rdfs-comment"> <b>pg_put_line()</b> sends a NULL-terminated string to the PostgreSQL backend server. This is needed in conjunction with PostgreSQL's <i>COPY FROM</i> command. </p> <p class="para"><i>COPY</i> is a high-speed data loading interface supported by PostgreSQL. Data is passed in without being parsed, and in a single transaction. </p> <p class="para"> An alternative to using raw <b>pg_put_line()</b> commands is to use <a href="function.pg-copy-from.html" class="function">pg_copy_from()</a>. This is a far simpler interface. </p> <blockquote><p><b class="note">Note</b>: The application must explicitly send the two characters "\." on the last line to indicate to the backend that it has finished sending its data, before issuing <a href="function.pg-end-copy.html" class="function">pg_end_copy()</a>. <br /> </p></blockquote> <div class="warning"><b class="warning">Warning</b> <p class="para"> Use of the <b>pg_put_line()</b> causes most large object operations, including <a href="function.pg-lo-read.html" class="function">pg_lo_read()</a> and <a href="function.pg-lo-tell.html" class="function">pg_lo_tell()</a>, to subsequently fail. You can use <a href="function.pg-copy-from.html" class="function">pg_copy_from()</a> and <a href="function.pg-copy-to.html" class="function">pg_copy_to()</a> instead. </p> </div> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">connection</tt></i></span> <dd> <p class="para"> PostgreSQL database connection resource. When <i><tt class="parameter">connection</tt></i> is not present, the default connection is used. The default connection is the last connection made by <a href="function.pg-connect.html" class="function">pg_connect()</a> or <a href="function.pg-pconnect.html" class="function">pg_pconnect()</a>. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">data</tt></i></span> <dd> <p class="para"> A line of text to be sent directly to the PostgreSQL backend. A <i>NULL</i> terminator is added automatically. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns <b><tt>TRUE</tt></b> on success or <b><tt>FALSE</tt></b> on failure. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>pg_put_line()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><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></span></code></div> </div> </div> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.pg-end-copy.html" class="function" rel="rdfs-seeAlso">pg_end_copy()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.pg-prepare.html">pg_prepare</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-query-params.html">pg_query_params</a></div> <div class="up"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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