I'm not sure that is it possible to do in one regex, but it doesn't hurt to ask.
I created the expression:
/(?<variable>\w+)((\.(?<method>\w+)\((?<parameter>[^{}%]*)\))|(\.(?<subvariable>\w+)))?/i
which helps me to "convert" dotted strings to arrays or call to methods:
core.settings => $core['settings']
core.set(param1, param2) => $core->set('param1', 'param2')
It works very well. But I have no idea how to build a several level expression which will work like this:
group <variable> = core
group <subvariable> = settings
group <variable> = core
group <method> = get
group <parameter> = param
group <variable> = core
group <subvariable> = settings.time
group <variable> = core
group <subvariable> = settings.time
group <method> = set
group <parameter> = param
Any ideas? And whether it is generally possible?
You can use
^(?<variable>\w+)(?:\.(?<subvariable>\w+(?:\.\w+)*))??(?:\.(?<method>\w+)\((?<parameter>[^{}%]*)\))?$
See the regex demo.
Details:
^ - start of string(?<variable>\w+) - Group "variable": one or more word chars(?:\.(?<subvariable>\w+(?:\.\w+)*))?? - zero or one occurrence of . and then Group "subvariable" matching one or more word chars followed with zero or more occurrences of a . and one or more word chars(?:\.(?<method>\w+)\((?<parameter>[^{}%]*)\))? - an optional sequence of
\. - a dot(?<method>\w+) - Group "method": one or more word chars\( - a ( char(?<parameter>[^{}%]*) - Group "parameter": zero or more chars other than {, }, %\) - a ) char$ - end of string.