[wp-trac] [WordPress Trac] #58174: A shortcode block that evaluates to nothing, renders as a space in the HTML

[WordPress Trac]

#58174: A shortcode block that evaluates to nothing, renders as a space in the HTML
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 Reporter:  asafm7        |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  General       |     Version:
 Severity:  normal        |  Resolution:
 Keywords:                |     Focuses:
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Comment (by asafm7):

 Okay, so it is a line break (\n).

 It is being added here:


 {{{
     $content = preg_replace_callback("/$pattern/", 'do_shortcode_tag',
 $content);
 }}}

 In the do_shortcode() function in shortcodes.php.

 I made sure the 'do_shortcode_tag' output never contains \n. But still,
 after this line, the $content contains \n in place of empty shortcodes. It
 doesn't make a lot of sense, but it seems there is some kind of bug with
 the native preg_replace_callback() PHP function.

 Adding a
 {{{
 $content = str_replace(">\n", ">", $content);
 }}}
 fixes the problem.

 There is no filter after this point though, so it seems it can't be fixed
 without modifying the core code.

-- 
Ticket URL: <https://core.trac.wordpress.org/ticket/58174#comment:2>
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