StringRegexpReplace with pattern position reset?

[Iczer]

I need to clean up text with xml tags from some attributes. Problem is - the random order those attributes placed. It would be simple if use 1 regexp for 1 attribute clearance, but it's not effective. So target is one complex pattern:

to clear attributes attr7,attr2 and attr5 from :

"<xmlTag attr0="aaa" attr1="bbb" attr2="ccc" attr3="ddd" attr4="eee" attr5="fff" attr6="ggg" attr7="hhh" attr7="iii" />"

Not working:

$sPreFilter = StringRegExpReplace(ClipGet(),"(?si)(\A.+?<xmlTag[^>]+?)(\attr7=[\x22\x27\x60][^\x22\x27\x60]++[\x22\x27\x60]|attr2=[\x22\x27\x60][^\x22\x27\x60]++[\x22\x27\x60]|attr5=[\x22\x27\x60][^\x22\x27\x60]++[\x22\x27\x60])([^>]+?>.+\z)","$1 $3")

Is it possible use (and how) reset start of match "\K" for it?

[FrancescoDiMuro]

@Iczer
Do you want to remove those attributes from the input string?
If so, this pattern should do the trick:

'(?si)(attr[257]=[\x22\x27\x60][^\x22\x27\x60]++[\x22\x27\x60])'

[mikell]

This could also be done using backreferences, subpattern calls and group reset

$s = '<xmlTag attr0="aaa" attr1="bbb" attr2="ccc" attr3="ddd" attr4="eee" attr5="fff" attr6="ggg" attr7="hhh" attr7="iii" />' 

$r = StringRegExpReplace($s,'(?si)(?|attr2=(([\x22\x27\x60])[^\x22\x27\x60]+\2)|attr5=(?1)|attr7=(?1))',"")

Msgbox(0,"", $r)