ksublondie:

Since the database is complaining that you're trying to violate a NULL constraint, I'd guess that perhaps you're interpolating a variable into the statement, and the variable is undefined (e.g., perhaps you misspelled the variable name inside the query string or when you initialized it?) Something like:

$foobar = 17;
$SQL = 'insert into kazam(col1) values ($fubar)';
$DB->do($SQL);
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...roboticus

When your only tool is a hammer, all problems look like your thumb.