Operations for regular expressions
The following table describes the operators that work with regular expressions. The operation performed by a regular expression operator in a given default syntax expression depends on whether the expression prefix identifies text or HTTP headers. Operations that evaluate headers override any text-based operations for all instances of the specified header type. When you use an operator, replace
Regular Expression Operation | Description |
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Selects the text that precedes the string that matches the |
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Selects the text that follows the string that matches the |
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Selects a string that matches the |
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Returns TRUE if the target matches a |
Operations for regular expressions
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