cvs: phpweb / tut.php

jmcastagnetto Mon Jul 15 19:53:46 2002 EDT Modified files: /phpweb tut.php Log: Modified to use $_POST instead of $HTTP_POST_VARS Added a subsection on using old code in view of the superglobals and register_globals being off. Ref Bug # 18361 Index: phpweb/tut.php diff -u phpweb/tut.php:1.16 phpweb/tut.php:1.17 --- phpweb/tut.php:1.16 Sun Jul 7 21:56:16 2002 +++ phpweb/tut.php Mon Jul 15 19:53:46 2002 @@ -228,8 +228,40 @@ <p> It should be obvious what this does. There is nothing more to it. -The $HTTP_POST_VARS["name"] and $HTTP_POST_VARS["age"] variables -are automatically set for you by PHP. +The $_POST["name"] and $_POST["age"] variables +are automatically set for you by PHP. (<b>Note:</b> On versions +previous to PHP 4.1.0, one needed to use the $HTTP_POST_VARS array +instead of the $_POST superglobal array. See the section on "<a +href="/manual/language.variables.predefined.php">Predefined +variables</a>" in the manual for more information). +</p> + +<h2>Using old code with new versions of PHP</h2> + +<p> +Now that PHP has grown to be a popular scripting language, there are +more resources out there that have listings of code you can reuse +in your own scripts. For the most part the developers of the PHP +language have tried to be backwards compatible, so a script written +for an older version should run (ideally) without changes in a newer +version of PHP, in practice some changes will usually be needed. +</p> +<p> +Two of the most important recent changes that affect old code are: +<ol> +<li>The deprecation of the old $HTTP_*_VARS arrays (which need to be +indicated as global when used inside a function or method), for the +superglobal arrays $_GET, $_POST, $_COOKIE, $_SERVER, $_ENV, $_REQUEST, +and $_SESSION, which are always accessible even from inside a function +scope. (PHP &gt;= 4.1.0)</li> +<li>External variables are no longer registered in the global scope by +default (in other words, "register_globals=off" by defaults in php.ini), +which means that the preferred method of accessing those values is via +the superglobal arrays mentioned above. (PHP &gt;= 4.2.0) +</ol> +For more details on these changes see the manual section on <a +href="/manual/language.variables.predefined.php">predefined +variables</a> and links therein. </p> <h2>What's next?</h2>