Fix compatibility with PHP 7.3

[felixonmars]

The regex fails to parse in PHP 7.3, which broke the page in later functions.

PHP Warning:  preg_replace(): Compilation failed: invalid range in character class at offset 4 in /var/www/felixcat/wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340

[willstocks]

@felixonmars - don't suppose you have Crayon working with WP 5.0?

[felixonmars]

Indeed, I am running Crayon with WP 5.0 under PHP 7.3.

[willstocks]

Interesting! I’m still on PHP 7.2 at the mo but running WP 5.0! How are declaring language options in the blocks? I only realised through fiddling this evening that when I add a code block, it is formatted by Crayon on the front-end, but I’ve not yet found a way to declare which language I’m writing!

…

On Tue, 11 Dec 2018 at 19:03, Felix Yan ***@***.***> wrote: Indeed, I am running Crayon with WP 5.0 under PHP 7.3. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#451 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Apt9Ah5CgTQM-5m6h3D8tAGomZBNzFbyks5u4AFtgaJpZM4ZKSDA> .

[felixonmars]

I've been using <pre lang="python"> or <pre class="lang:python"> for that.

[willstocks]

Brilliant! Are you just wrapping it manually by "Edit block as HTML"?

[felixonmars]

Yes.

[bollwarm]

perfect ,!

[gilvegliach]

Is this ever gonna be released? I spent a lot of time today to figure out the same issue before finding this.