What potential error could occur when calling the setVar method in the PHP code?

The potential error that could occur when calling the setVar method in the PHP code is that the method may not exist in the class. To solve this issue, you should check if the method exists before calling it to avoid a fatal error. You can use the method_exists function to check if the method is defined in the class before invoking it. 

if (method_exists($obj, 'setVar')) {
    $obj->setVar($value);
} else {
    echo "Method setVar does not exist in the class.";
}

Keywords

setVar method PHP code error function call debugging

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