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change MonthlySums::$dbh->query($sql); to self::$dbh->query($sql);– Ranjeet SinghCommented Apr 15, 2016 at 10:10
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Fatal error: Access to undeclared static property: Settings::$dbh in– pollux1erCommented Apr 15, 2016 at 10:10
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Ok, the previous error is back again– pollux1erCommented Apr 15, 2016 at 10:12
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Why have it static in the first place?– ka_linCommented Apr 15, 2016 at 10:12
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1When you call a static method in a class the constructor is not automatically invoked like when you create an instance of the class. With your code you would have to create at least once instance of the class so that the database connection would be set in your static variable. Then you would be able to call it in your desired static way.– ST2ODCommented Apr 15, 2016 at 10:25
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