So, none of the docs I can find show parentheses as a reserved character, but when I put in a regex of 'sample(_POST' it is rejected, but when I do 'sample\(POST' it is taken - in these samples the '' are not there.
But, I'm not sure if the REXEX is matching on the \( or just (
here is an error example:
pattern '=@eval(base64_decode($_POST' is invalid. syntax error at end of input 42100 -> signature -> standard -> dummyRule -> and-condition -> And Condition 1 -> or-condition -> Or Condition 3 -> operator -> pattern-match -> pattern is invalid
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