A regular expression to exclude a word string

Question

I have a regular expression as follows      a-z0-9      This matches strings such as  hello or  hello123   However  I would like it to exclude a couple of string values such as  ignoreme and  ignoreme2   I ve tried a few variants but can t seem to get any to work   My latest feeble attempt was          ignoreme     ignoreme2   a-z0-9       Any help would be gratefully appreciated  -

User · Answer

This should do it      b  a-z0-9    b   lt  ignoreme ignoreme2 ignoreme3    You can add as much ignored words as you like  here is a simple PHP implementation    ignoredWords   array  ignoreme    ignoreme2    ignoreme        preg match      b  a-z0-9    b   lt      implode      array map  preg quote    ignoredWords        i    string

User · Answer

As you want to exclude both words  you need a conjuction        ignoreme     ignoreme2   a-z0-9      Now both conditions must be true  neither ignoreme nor ignoreme2 is allowed  to have a match

User · Answer

Here s yet another way  using a negative look-ahead          ignoreme ignoreme2 ignoremeN   a-z0-9        Note  There s only one capturing expression    a-z0-9

User · Answer

simpler  re findall r     ignoreme   w       quot  hello  ignoreme and  ignoreme2  ignoreme2M  quot    you will get    hello

[regex] A regular expression to exclude a word/string

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