How can the error related to the undefined function "zeitwandlung()" be resolved in the given PHP class?

The error related to the undefined function "zeitwandlung()" can be resolved by either defining the function within the class or including the file where the function is defined before calling it. If the function is meant to be a part of the class, it should be defined within the class scope. 

class Zeitrechner {
    // Define the zeitwandlung() function within the class scope
    public function zeitwandlung($zeit) {
        // Function implementation here
    }
    
    // Other class methods and properties
}

Keywords

PHP function undefined error class

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