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I am having a problem with a local $page variable, especially when using it in The Loop. Is it a reserved variable of Wordpress? Also where can I find a list of all those global variables?

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Yes. It is an "inside the Loop" global.

$page (int) The page of the post, as specified by the query var page.

http://codex.wordpress.org/Global_Variables

It is setup and used by setup_postdata which executes at every iteration of a standard Loop. Though meant for use inside the Loop, the variable would still be set after the Loop to the last data it was given (unless specifically unset and I don't think it is, but am not swearing to that).

  • But how can a variable become global only in a loop? – user25893 Oct 3 '13 at 22:26
  • the_post() initializes them? – user25893 Oct 3 '13 at 22:28
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    @Maxwell : see the edit – s_ha_dum Oct 3 '13 at 22:35
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The wordpress codex is definitely your friend finding such information... :) and, yes, $post is one of wordpress's Global Variables.

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