Error message Strict standards: Non-static method should not be called statically in php

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Your methods are missing the static keyword. Change

function getInstanceByName($name=""){

to

public static function getInstanceByName($name=""){

if you want to call them statically.

Note that static methods (and Singletons) are death to testability.

Also note that you are doing way too much work in the constructor, especially all that querying shouldn’t be in there. All your constructor is supposed to do is set the object into a valid state. If you have to have data from outside the class to do that consider injecting it instead of pulling it. Also note that constructors cannot return anything. They will always return void so all these return false statements do nothing but end the construction.

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