From the docs:

With most drivers, placeholders can't be used for any element of a statement that would prevent the database server from validating the statement and creating a query execution plan for it. For example: 
"SELECT name, age FROM ?"         # wrong (will probably fail)

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So I don't think what you are trying to do will work. Perhaps just building the string using your array values?

In reply to Re: mySQL non-string bind variable by wfsp
in thread mySQL non-string bind variable by Anonymous Monk

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