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I’m sure this is a simple thing to do but in php I need to make a 32 byte emptied out variable (i.e. it is all zeroes). I am trying to decode in php an AES encrypted message where the initialization vector is all zeroes. If I use null or 0 then I get an error that it needs to be 32 bytes and if I use “00000000000000000000000000000000” that is the string and is also not all zeroes.
If by “all zero” you mean zero bytes: