Technology Tales

Adventures & experiences in contemporary technology

Overriding replacement of double or triple hyphenation in WordPress

7th June 2016

On here, I have posts with example commands that include double hyphens and they have been displayed merged together, something that has resulted in a comment posted by a visitor to this part of the web. All the while, I have been blaming the fonts that I have been using only for it to be the fault of WordPress itself.

Changing multiple dashes to something else has been a feature of Word autocorrect but I never expected to see WordPress aping that behaviour and it has been doing so for a few years now. The culprit is wptexturize and that cannot be disabled for it does many other useful things.

What happens is that the wptexturize filter changes ‘---‘ (double hyphens) to ‘–’ (– in web entity encoding) and ‘---‘ (triple hyphens) to ‘—’ (— in web entity encoding). The solution is to add another filter to the content that changes these back to the way they were and the following code does this:

add_filter( ‘the_content’ , ‘mh_un_en_dash’ , 50 );
function mh_un_en_dash( $content ) {
$content = str_replace( ‘–’ , ‘--‘ , $content );
$content = str_replace( ‘—’ , ‘---‘ , $content );
return $content;
}

The first line of the segment adds in the new filter that uses the function defined below it. The third and fourth lines above do the required substitution before the function returns the post content for display in the web page. The whole code block can be used to create a plugin or placed the theme’s functions.php file. Either way, things appear without the substitution confusing your readers. It makes me wonder if a bug report has been created for this because the behaviour looks odd to me.

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