📄 intro.pdo.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>Introduction</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="book.pdo.html">PDO</a></div> <div class="next" style="text-align: right; float: right;"><a href="pdo.setup.html">Installing/Configuring</a></div> <div class="up"><a href="book.pdo.html">PDO</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="intro.pdo" class="preface">  <h1 class="title">Introduction</h1>  <p class="para">   The PHP Data Objects (PDO) extension defines a lightweight, consistent interface   for accessing databases in PHP. Each database driver that   implements the PDO interface can expose database-specific   features as regular extension functions. Note that you cannot   perform any database functions using the PDO extension by   itself; you must use a <a href="pdo.drivers.html" class="link">database-specific   PDO driver</a> to access a database server.  </p>  <p class="para">   PDO provides a <em class="emphasis">data-access</em> abstraction layer, which   means that, regardless of which database you&#039;re using, you use the same   functions to issue queries and fetch data.  PDO does   <em class="emphasis">not</em> provide a <em class="emphasis">database</em>   abstraction; it doesn&#039;t rewrite SQL or emulate missing features.  You   should use a full-blown abstraction layer if you need that facility.  </p>  <p class="para">   PDO ships with PHP 5.1, and is available as a PECL extension for PHP 5.0;   PDO requires the new OO features in the core of PHP 5, and so will not   run with earlier versions of PHP.  </p> </div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="book.pdo.html">PDO</a></div> <div class="next" style="text-align: right; float: right;"><a href="pdo.setup.html">Installing/Configuring</a></div> <div class="up"><a href="book.pdo.html">PDO</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>

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