Do namespace declarations within included files automatically include the parent file's namespace (PHP)?

Should be a simple question. I do not yet have 5.3 installed, so I cannot experiment myself.

When declaring a namespace in an included file, do I have to declare the full path of the namespace, or is the parent namespace already assumed to be included?

For instance, if I have a file:

// file1.php
&l开发者_运维技巧t;?php
    namespace parent_space;
    include 'file2.php';
?>

and a second file:

// file2.php
<?php
    namespace child_space;
    // some code
?>

Since file2.php is included from within the parent_space namespace in file1.php, is the namespace for "some code" \parent_space\child_space\ , or is it just \child_space\ ?

No. PHP does not attach any significance to the location of your file when including, but it does treat each file as a completely separate entity as far as namespaces are concerned when parsing the code.

So this code will not work:

<?php
    namespace Food; //this is a top level namespace
    include 'file2.php';

//file2.php
<?php
    namespace Tacos; //this is still a top level namespace

You would need to define your file2.php in this manner:

<?php

namespace Food\Tacos;

Reference the PHP manual for more information about namespaces: http://www.php.net/manual/en/language.namespaces.basics.php

There are some similar examples in the PHP manual namespace section:

http://www.php.net/manual/en/language.namespaces.basics.php

The short answer is: no.