Classic ASP Requires Chilkat v11.1.0+
Classic ASP
Regular Expression with Multiple Matches and Capture Groups
See more Regular Expressions Examples
Demonstrates a regular expression with multiple matches and capture groups for each match.Note: Chilkat uses PCRE2. See PCRE2 Regular Expressions
Also see: PCRE2 Performance
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<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
</head>
<body>
<%
success = 0
pattern = "Name:\s+(\w+)\s+(\w+),\s+Email:\s+(\S+)"
set sb = Server.CreateObject("Chilkat.StringBuilder")
crlf = 1
success = sb.AppendLine("Name: John Smith, Email: john.smith@example.com",crlf)
success = sb.AppendLine("Name: Jack Johnson, Email: jack.johnson@example.com",crlf)
success = sb.AppendLine("Name: Mary Adams, Email: mary.adams@example.com",crlf)
Response.Write "<pre>" & Server.HTMLEncode( sb.GetAsString()) & "</pre>"
' We have the following string:
' Name: John Smith, Email: john.smith@example.com
' Name: Jack Johnson, Email: jack.johnson@example.com
' Name: Mary Adams, Email: mary.adams@example.com
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>"
' This is the JSON with the match information.
' See the JSON parsing code below to get the matched capture group values.
' {
' "match": [
' {
' "group": [
' {
' "cap": "Name: John Smith, Email: john.smith@example.com",
' "idx": 0,
' "len": 47
' },
' {
' "cap": "John",
' "idx": 6,
' "len": 4
' },
' {
' "cap": "Smith",
' "idx": 11,
' "len": 5
' },
' {
' "cap": "john.smith@example.com",
' "idx": 25,
' "len": 22
' }
' ]
' },
' {
' "group": [
' {
' "cap": "Name: Jack Johnson, Email: jack.johnson@example.com",
' "idx": 49,
' "len": 51
' },
' {
' "cap": "Jack",
' "idx": 55,
' "len": 4
' },
' {
' "cap": "Johnson",
' "idx": 60,
' "len": 7
' },
' {
' "cap": "jack.johnson@example.com",
' "idx": 76,
' "len": 24
' }
' ]
' },
' {
' "group": [
' {
' "cap": "Name: Mary Adams, Email: mary.adams@example.com",
' "idx": 102,
' "len": 47
' },
' {
' "cap": "Mary",
' "idx": 108,
' "len": 4
' },
' {
' "cap": "Adams",
' "idx": 113,
' "len": 5
' },
' {
' "cap": "mary.adams@example.com",
' "idx": 127,
' "len": 22
' }
' ]
' }
' ]
' }
' Important: Capture group 0 always contains the entire match — that is, the portion of the input string that matches the full regular expression.
i = 0
matchCount = json.SizeOfArray("match")
Do While i < matchCount
Response.Write "<pre>" & Server.HTMLEncode( "Match " & i + 1 & ":") & "</pre>"
json.I = i
j = 0
numCaptureGroups = json.SizeOfArray("match[i].group")
Do While j < numCaptureGroups
json.J = j
cap = json.StringOf("match[i].group[j].cap")
Response.Write "<pre>" & Server.HTMLEncode( j & ": " & cap) & "</pre>"
j = j + 1
Loop
i = i + 1
Loop
' Capture group 0 always contains the entire match — that is, the portion of the input string that matches the full regular expression.
' Output
' Match 1:
' 0: Name: John Smith, Email: john.smith@example.com
' 1: John
' 2: Smith
' 3: john.smith@example.com
' Match 2:
' 0: Name: Jack Johnson, Email: jack.johnson@example.com
' 1: Jack
' 2: Johnson
' 3: jack.johnson@example.com
' Match 3:
' 0: Name: Mary Adams, Email: mary.adams@example.com
' 1: Mary
' 2: Adams
' 3: mary.adams@example.com
%>
</body>
</html>