The replace_regex function replaces all RE2 regular expression matches with another string.

Syntax ​

replace_regex( Text, Regex, Rewrite )

Arguments ​

• Text: A string.
• Regex: The RE2 regular expression to search text. The expression can contain capture groups in parentheses.
• Rewrite: The replacement regex for any match made by Regex. Use \0 to refer to the whole match, \1 for the first capture group, \2 and so on for subsequent capture groups.

Results ​

Source after replacing all matches of Regex with evaluations of Rewrite. Matches do not overlap.

Examples ​

This example replaces the input string’s “is” with “was”:

print theText="Number is 2.000000"| extend theNewText=replace_regex(theText, @'is (\d+)', @'was: \1')

This example returns Number was: 2.000000:

replace_regex("Number is 2.000000", @'is (\d+)', @'was: \1')

This example returns Number was: 5.000000:

replace_regex("Number is 5.000000", @'is (\d+)', @'was: \1')