UTF-8 support in PHP labels

Hi.

The PHP manual says that any multi-byte UTF-8 character is valid for variable names and any other label, like function names.

So this is valid PHP code:

function AñadirAcción($acción) 
{ 
   $░▒▓█Coração_do_Æsir😝█▓▒░ = $acción;
}

That weird variable is unlikely 😃 but it’s a valid one, and spanish, portuguese, and other non-english speakers can use native language labels in PHP.

EnlighterJS uses a simple regex \$[A-Z_][\w]* for (at least) variables which doesn’t include those characters, coloring wrong that code:

The PHP manual suggests a regex for a valid PHP label: [a-zA-Z_\x80-\xff][a-zA-Z0-9_\x80-\xff].

Thanks!

[AndiDittrich]

keep in mind that regular expression works on characters, not on bytes - this requires a much more generic expression:

but generally this php behaviour is only a side effect of the parser and can be threatened as a kind of bug…

i’ve changed the functions+variable regex to the following expression to match utf8 chars:

// variables
{
    regex: /\$[^\s=;()]+/gim,
    type: 'k7'
},

// global function calls
{
    regex: /\b([^\s(]+)\s*\(/gm,
    type: 'm0'
},

[AndiDittrich]

Hi @drmad ,

it’s not a big issue to change this - most of the EnlighterJS languages doesn’t support unicode.