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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>Examples</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="pgsql.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="up"><a href="book.pgsql.html">PostgreSQL</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div> <h1>Examples</h1> <div id="pgsql.examples-basic" class="section"> <p class="para"> This simple example shows how to connect, execute a query, print resulting rows and disconnect from a PostgreSQL database. <div class="example"> <p><b>Example #1 PostgreSQL extension overview example</b></p> <div class="example-contents"><div class="phpcode"><code><span style="color: #000000"><span style="color: #0000BB"><?php<br /></span><span style="color: #FF8000">// Connecting, selecting database<br /></span><span style="color: #0000BB">$dbconn </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_connect</span><span style="color: #007700">(</span><span style="color: #DD0000">"host=localhost dbname=publishing user=www password=foo"</span><span style="color: #007700">)<br /> or die(</span><span style="color: #DD0000">'Could not connect: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">pg_last_error</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">// Performing SQL query<br /></span><span style="color: #0000BB">$query </span><span style="color: #007700">= </span><span style="color: #DD0000">'SELECT * FROM authors'</span><span style="color: #007700">;<br /></span><span style="color: #0000BB">$result </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_query</span><span style="color: #007700">(</span><span style="color: #0000BB">$query</span><span style="color: #007700">) or die(</span><span style="color: #DD0000">'Query failed: ' </span><span style="color: #007700">. </span><span style="color: #0000BB">pg_last_error</span><span style="color: #007700">());<br /><br /></span><span style="color: #FF8000">// Printing results in HTML<br /></span><span style="color: #007700">echo </span><span style="color: #DD0000">"<table>\n"</span><span style="color: #007700">;<br />while (</span><span style="color: #0000BB">$line </span><span style="color: #007700">= </span><span style="color: #0000BB">pg_fetch_array</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">, </span><span style="color: #0000BB">null</span><span style="color: #007700">, </span><span style="color: #0000BB">PGSQL_ASSOC</span><span style="color: #007700">)) {<br /> echo </span><span style="color: #DD0000">"\t<tr>\n"</span><span style="color: #007700">;<br /> foreach (</span><span style="color: #0000BB">$line </span><span style="color: #007700">as </span><span style="color: #0000BB">$col_value</span><span style="color: #007700">) {<br /> echo </span><span style="color: #DD0000">"\t\t<td>$col_value</td>\n"</span><span style="color: #007700">;<br /> }<br /> echo </span><span style="color: #DD0000">"\t</tr>\n"</span><span style="color: #007700">;<br />}<br />echo </span><span style="color: #DD0000">"</table>\n"</span><span style="color: #007700">;<br /><br /></span><span style="color: #FF8000">// Free resultset<br /></span><span style="color: #0000BB">pg_free_result</span><span style="color: #007700">(</span><span style="color: #0000BB">$result</span><span style="color: #007700">);<br /><br /></span><span style="color: #FF8000">// Closing connection<br /></span><span style="color: #0000BB">pg_close</span><span style="color: #007700">(</span><span style="color: #0000BB">$dbconn</span><span style="color: #007700">);<br /></span><span style="color: #0000BB">?></span></span></code></div> </div> </div> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="pgsql.constants.html">Predefined Constants</a></div> <div class="next" style="text-align: right; float: right;"><a href="ref.pgsql.html">PostgreSQL Functions</a></div> <div class="up"><a href="book.pgsql.html">PostgreSQL</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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