[wp-trac] [WordPress Trac] #30779: Call to undefined function wp_json_encode()

[WordPress Trac]

#30779: Call to undefined function wp_json_encode()
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 Reporter:  pento         |       Owner:
     Type:  defect (bug)  |      Status:  new
 Priority:  high          |   Milestone:  Awaiting Review
Component:  General       |     Version:  4.1
 Severity:  major         |  Resolution:
 Keywords:                |     Focuses:
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Comment (by azaozz):

 This may happen because `class.wp-scripts.php` is included from `script-
 loader.php` which is included from `wp-admin/load-scripts.php` and `wp-
 admin/load-styles.php`. Both of these run "outside" of WordPress and don't
 load functions.php.

 However this won't bring the site down. It will fail to output
 concatenated scripts or styles in the admin. Looking at the (only?) report
 in the forum, this sounds more like a failed upgrade.

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Ticket URL: <https://core.trac.wordpress.org/ticket/30779#comment:1>
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