<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <html> <head> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> <title>What has changed in PHP 5.2.x</title> </head> <body><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="migration52.html">Migrating from PHP 5.1.x to PHP 5.2.x</a></div> <div class="next" style="text-align: right; float: right;"><a href="migration52.incompatible.html">Backward Incompatible Changes</a></div> <div class="up"><a href="migration52.html">Migrating from PHP 5.1.x to PHP 5.2.x</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div><hr /><div id="migration52.changes" class="section"> <h2 class="title">What has changed in PHP 5.2.x</h2> <p class="para"> Most improvements in PHP 5.2.x have no impact on existing code. There are a <a href="migration52.incompatible.html" class="link">few incompatibilities</a> and <a href="migration52.error-messages.html" class="link">new error messages</a> that should be considered, and code should be tested before switching PHP versions in production environments. </p> <p class="para"> If the system is being upgraded from PHP 5.0.x, the manual section titled <a href="migration51.html" class="link">Upgrade Notes for PHP 5.1.x</a> should also be read. </p> <p class="para"> Similarly, if the system is being upgraded from PHP 4, the manual section titled <a href="migration5.html" class="link">Migrating from PHP 4 to PHP 5</a> should be read as well. </p> </div><hr /><div class="manualnavbar" style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="migration52.html">Migrating from PHP 5.1.x to PHP 5.2.x</a></div> <div class="next" style="text-align: right; float: right;"><a href="migration52.incompatible.html">Backward Incompatible Changes</a></div> <div class="up"><a href="migration52.html">Migrating from PHP 5.1.x to PHP 5.2.x</a></div> <div class="home"><a href="index.html">PHP Manual</a></div> </div></body></html>