Classic ASP Requires Chilkat v11.1.0+
Regular Expression with Multiple Matches and Named Capture Groups

Demonstrates regular expressions with named capture groups and multiple matches.
Chilkat Classic ASP Downloads

Classic ASP
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0

set sb = Server.CreateObject("Chilkat.StringBuilder")
crlf = 1
success = sb.AppendLine("Name: John Smith",crlf)
success = sb.AppendLine("Name: Jack Johnson",crlf)
success = sb.AppendLine("Name: Mary Adams",crlf)

Response.Write "<pre>" & Server.HTMLEncode( sb.GetAsString()) & "</pre>"

'  We have the following string:
'  Name: John Smith
'  Name: Jack Johnson
'  Name: Mary Adams

pattern = "Name:\s+(?<first>\w+)\s+(?<last>\w+)"
set json = Server.CreateObject("Chilkat.JsonObject")
json.EmitCompact = 0

timeoutMs = 2000
numMatches = sb.RegexMatch(pattern,json,timeoutMs)
If (numMatches < 0) Then
    '  Probably an error in the regular expression.
    '  Suggestion: Use AI to help create and/or diagnose regular expressions.
    Response.Write "<pre>" & Server.HTMLEncode( sb.LastErrorText) & "</pre>"
    Response.End
End If

'  Examine the matches:
Response.Write "<pre>" & Server.HTMLEncode( json.Emit()) & "</pre>"

'  Here is the JSON showing the matches.
'  Important:  Capture group 0 always contains the entire match — that is, the portion of the input string that matches the full regular expression.

'  {
'    "named": {
'      "first": 1,
'      "last": 2
'    },
'    "match": [
'      {
'        "group": [
'          {
'            "cap": "Name: John Smith",
'            "idx": 0,
'            "len": 16
'          },
'          {
'            "cap": "John",
'            "idx": 6,
'            "len": 4
'          },
'          {
'            "cap": "Smith",
'            "idx": 11,
'            "len": 5
'          }
'        ]
'      },
'      {
'        "group": [
'          {
'            "cap": "Name: Jack Johnson",
'            "idx": 18,
'            "len": 18
'          },
'          {
'            "cap": "Jack",
'            "idx": 24,
'            "len": 4
'          },
'          {
'            "cap": "Johnson",
'            "idx": 29,
'            "len": 7
'          }
'        ]
'      },
'      {
'        "group": [
'          {
'            "cap": "Name: Mary Adams",
'            "idx": 38,
'            "len": 16
'          },
'          {
'            "cap": "Mary",
'            "idx": 44,
'            "len": 4
'          },
'          {
'            "cap": "Adams",
'            "idx": 49,
'            "len": 5
'          }
'        ]
'      }
'    ]
'  }

'  The capture group index is obtained by looking up the name in the JSON result.
'  For example:

idx_first = json.IntOf("named.first")
idx_last = json.IntOf("named.last")

i = 0
matchCount = json.SizeOfArray("match")
Do While i < matchCount
    Response.Write "<pre>" & Server.HTMLEncode( "Match " & i + 1 & ":") & "</pre>"
    json.I = i

    json.J = idx_first
    Response.Write "<pre>" & Server.HTMLEncode( "first: " & json.StringOf("match[i].group[j].cap")) & "</pre>"

    json.J = idx_last
    Response.Write "<pre>" & Server.HTMLEncode( "first: " & json.StringOf("match[i].group[j].cap")) & "</pre>"

    Response.Write "<pre>" & Server.HTMLEncode( "") & "</pre>"
    i = i + 1
Loop

'  Output is: 

'  Match 1:
'  first: John
'  first: Smith
'  
'  Match 2:
'  first: Jack
'  first: Johnson
'  
'  Match 3:
'  first: Mary
'  first: Adams

%>
</body>
</html>