📄 function.pg-fetch-all-columns.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>Fetches all rows in a particular result column as an array</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-execute.html">pg_execute</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-fetch-all.html">pg_fetch_all</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-fetch-all-columns" class="refentry"> <div class="refnamediv"> <h1 class="refname">pg_fetch_all_columns</h1> <p class="verinfo">(PHP 5 >= 5.1.0)</p><p class="refpurpose"><span class="refname">pg_fetch_all_columns</span> — <span class="dc-title">Fetches all rows in a particular result column as an array</span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">array</span> <span class="methodname"><b><b>pg_fetch_all_columns</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$result</tt></span> [, <span class="methodparam"><span class="type">int</span> <tt class="parameter">$column</tt></span> ] )</div> <p class="para rdfs-comment"> <b>pg_fetch_all_columns()</b> returns an array that contains all rows (records) in a particular column of the result resource. </p> <blockquote><p><b class="note">Note</b>: <span class="simpara">This function sets NULL fields tothe PHP <b><tt>NULL</tt></b> value.</span></p></blockquote> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">result</tt></i></span> <dd> <p class="para"> PostgreSQL query result resource, returned by <a href="function.pg-query.html" class="function">pg_query()</a>, <a href="function.pg-query-params.html" class="function">pg_query_params()</a> or <a href="function.pg-execute.html" class="function">pg_execute()</a> (among others). </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">column</tt></i></span> <dd> <p class="para"> Column number, zero-based, to be retrieved from the result resource. Defaults to the first column if not specified. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> An <a href="language.types.array.html" class="type array">array</a> with all values in the result column. </p> <p class="para"> <b><tt>FALSE</tt></b> is returned if <i><tt class="parameter">column</tt></i> is larger than the number of columns in the result, or on any other error. </p> </div> <div class="refsect1 examples"> <h3 class="title">Examples</h3> <p class="para"> <div class="example"> <p><b>Example #1 <b>pg_fetch_all_columns()</b> example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php <br />$conn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_pconnect</span><span style="color: #007700">(</span><span style="color: #DD0000">"dbname=publisher"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$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 /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$conn</span><span style="color: #007700">, </span><span style="color: #DD0000">"SELECT title, name, address FROM authors"</span><span style="color: #007700">);<br />if (!</span><span style="color: #0000BB">$result</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"An error occured.\n"</span><span style="color: #007700">;<br /> exit;<br />}<br /><br /></span><span style="color: #FF8000">// Get an array of all author names<br /></span><span style="color: #0000BB">$arr </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_fetch_all_columns</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">1</span><span style="color: #007700">);<br /><br /></span><span style="color: #0000BB">var_dump</span><span style="color: #007700">(</span><span style="color: #0000BB">$arr</span><span style="color: #007700">);<br /><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-fetch-all.html" class="function" rel="rdfs-seeAlso">pg_fetch_all()</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-execute.html">pg_execute</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.pg-fetch-all.html">pg_fetch_all</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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