[wp-trac] [WordPress Trac] #19672: WP cannot be loaded through function because of variable scope

[WordPress Trac]

#19672: WP cannot be loaded through function because of variable scope
--------------------------+-----------------------------
 Reporter:  uuf6429       |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  General       |    Version:
 Severity:  normal        |   Keywords:
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 WP uses variable scope extensively to deliver some global variables like
 $wp and $wp_rewrite.

 These variables are set inside wp-settings.php and assumed that the file
 has been included from global context.

 Because of this assumption, wordpress cannot be loaded from a localized
 scope (such as a function).

 Something like this fails:

 {{{
 function loadWP(){
     include 'wordpress/index.php';
 }

 loadWP(); // fails
 include 'wordpress/index.php'; // works (assuming current file was
 included globally)
 }}}
 The first error reported is "Fatal Error: Call to a member function
 add_rewrite_tag() on a non-object", but this gets worse when more things
 dependent on these global variables simply fail.

 SOLUTION

 The solution is to specifically tell PHP these variables are globals. This
 should be done in wp-settings.php by adding the following:

 {{{ global $wp_rewrite; }}}

 Before this line (line 240 in WP 3.3)

 {{{ $wp_rewrite = new WP_Rewrite(); }}}

 Presumably, instead you would want to have a single line at the beginning
 of the file like so:

 {{{ global $wp_the_query, $wp_query, $wp_rewrite, $wp; }}}

 Chris.

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Ticket URL: <http://core.trac.wordpress.org/ticket/19672>
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