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From: Arno Welzel <usenet@arnowelzel.de>
Newsgroups: comp.lang.php
Subject: Re: Nested PHP
Date: Sun, 02 Mar 2014 15:54:21 +0100
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Adrian Tuddenham, 2014-02-10 21:24:

> I am using a php program to generate and download a webpage as an HTML
> file, the HTML file draws its headers and navigation bar from another
> HTML file using some embedded php with an "include" command.
> 
> The embedded php doesn't run when the file is downloaded, so the page
> appears in the browser without its headers or navigation.

PHP is only executed on the *server*. Any PHP which is "dynamically"
added as output will *not* be executed at all.

Example - if you have a file "test.php" and request it using the browser
via http://mydomain.example/test.php:

<?php
echo "Test";
?>

This will just output "Test".

BUT: If the same will adds additional PHP code it will just be sent to
the browser without any interpetation by the PHP runtime:

<?php
echo "echo \"My embedded test\";";
?>

If you really need to execute "dynamic" PHP, you have to use eval(),
which executes the code passed as parameter:

<?php
$mycode = "echo \"My embedded test\";";

eval($mycode);
?>

Even though this may work - the problem with eval() is, that it is
horrible to debug. You don't have just a script but a script generating
another script which will then be executed.

I recommend to think about what you want to solve and if it is really
neccessary to create "dyanamic" PHP on the fly.



-- 
Arno Welzel
http://arnowelzel.de
http://de-rec-fahrrad.de
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