Custom syntax highlight

[incastrix]

a way to add custom syntax to main one. see #761.

[incastrix]

(In [1642]) fix #761 also see #762.

[wanderingstan]

I second the request for this feature.

Personally I can't stand the default syntax coloring; variables are colored so light as to be unreadable and single-quoted text is garishly bold for no reason. (IMHO!)

[hurart]

The file syntax.xml is wrong.
It doesn't have the following items:

<s f="echo" u="echo">echo</s>
<s f="empty" u="empty">empty</s>
<s f="isset" u="isset">isset</s>
<s f="unset" u="unset">unset</s>
<s f="include" u="include">include</s>
<s f="print" u="print">print</s>
<s f="require" u="require">require</s>
<s f="require_once" u="require_once">require_once</s>
<s f="include_once" u="include_once">include_once</s>
<s f="goto" u="goto">goto</s>

I think there are more lost items.