Description:
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When trying to use pg_copy_to on a schema other than public, the tablename argument should allow the schema to be passed in, i.e. pg_copy_to($conn, "schema.tablename").

Reproduce code:
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From manual page: function.pg-copy-to#Description
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$tablename = "mwa.newprojects";

$rows = pg_copy_to($db, $tablename);

Expected result:
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Return the contents of the table into a formatted array

Actual result:
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FAILED ERROR:  relation "mwa.newprojects" does not exist