Description:
------------
I use var export to generate PHP code fragments as one of it's strength is that it's output is an expression of parseable PHP. However, when var_export refers to classes, it refers to their relative name (from root) instead of their absolute name, making you unable to use the output in namespace context (contexts with a specified namespace).

Too illustrate this problem, say we're exporting an instance of the class 'foo\bar\BazClass'. var_export will now return something like:

"foo\bar\BazClass::__set_state(...)"

If inserted into a file with a beginning declaration "namespace foo_space" this code will not work as the class in the expression would refer to foo_space\foo\bar\BazClass which is incorrect and probably throws a fatal error.

A simple fix is to make the ouput of var_export return namespaced classes with an initial '\' e.g. instead of the above, make it return:

"\foo\bar\BazClass::__set_state(...)"

This would make the expression work in any namespace context.

Test script:
---------------
<?php namespace foo\bar;

class BazClass {
    public $x = 3.14;
    public $y = 5.14;
}

$baz = new BazClass();
$baz->x = 4.14;
$baz->y = 5.14;

$file = tempnam(sys_get_temp_dir(), "tst");
file_put_contents($file, '<?php namespace foo_space; return ' . var_export($baz, true) . ";");

$class = require($file);
echo $class->x + $class->y;



Expected result:
----------------
9.28

Actual result:
--------------
Fatal error: Class 'foo_space\foo\bar\BazClass' not found in C:\Windows\Temp\tst88FE.tmp on line 1