escaped shortcodes should not be expanded during 'get_the_excerpt'

[bobbingwide]

It is possible for "the_content" filter to be invoked while processing "get_the_excerpt".

If the do_shortcodes() filter hook is attached to both "the_content" and "get_the_excerpt" then this can lead to an unexpected expansion of an escaped shortcode.

This can lead to unwanted side effects, as reported here.
​http://www.oik-plugins.com/2013/12/escaped-shortcodes-unexpectedly-expanded-get_the_excerpt/

This minor problem can be alleviated by a simple change to strip_shortcode_tag(), returning the HTML code [ as the first character rather than the left square bracket.

function strip_shortcode_tag( $m ) {
	// allow [[foo]] syntax for escaping a tag
	if ( $m[1] == '[' && $m[6] == ']' ) {
		return "[" . substr($m[0], 2, -1) ;
	}
	return $m[1] . $m[6];
}

I don't believe that it's necessary to make the same change in do_shortcode_tag().

[bobbingwide]

patch for 26649

[SergeyBiryukov]

Duplicate of #19927.

[bobbingwide]

Hi Sergey. Thanks for finding 19927 for me. I wondered why my patch had two changes.
The change in 19927 is for do_shortcode_tag()
The second part of the change, in 26649, is for strip_shortcode_tag().

The problem is not exactly a duplicate as the fix for 26649 handles the situation where shortcodes are being removed.

The patch for 26649 will work for 19927 but not vice-versa.
How should this be addressed?

[SergeyBiryukov]

Replying to bobbingwide:

The patch for 26649 will work for 19927 but not vice-versa.

I see, thanks for the clarification. Let's close #19927 in favor if this ticket then.

[SergeyBiryukov]

#19927 was marked as a duplicate.

[SergeyBiryukov]

Related: #12760, #25820.

[iseulde]

This ticket has not seen any activity in over *two* years, so I'm closing it as "wontfix".

The ticket may lack decisiveness, may have become irrelevant, or may not have gathered enough interest.

If you think this ticket does deserve some attention again, feel free to reopen.

For bugs, it would be great if you could provide updated steps to reproduce against the latest version of WordPress (5.0.2 at the time of writing). Remember images or a video can be superior to explain a problem. At the very least, quickly test again to make sure the bug still exists.

If it’s an enhancement or feature, some extra motivation may help.

Thank you for your contributions to WordPress! <3

[JeffPaul]

A ​decision was made to reopen tickets that were closed in the bulk edit that this ticket was affected by. This ticket is being placed back into the Awaiting Review milestone so it can be individually evaluated and verified to determine if it is still relevant/valid or reproducible.