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I want to exclude a specific number like 4800 from a string of numbers like 569048004801.
I’m using php for this and the method preg_match_all some pattern’s examples I have tried :
/([^4])([^8])([^0])([^0])/i
/([^4800])/i
This actually says, a sequence of four characters that is not “4800”. Close.
This actually says, a single character that is not ‘4’, ‘8’, or ‘0’.
Assuming you mean to capture a number that doesn’t contain “4800” in it, I think you might want
This says, check first that we’re not looking at a string of numbers with “4800” somewhere, and provided this is the case, capture the string of numbers. It’s called a “negative lookahead assertion”.