Design Mode (adapter)

Design Mode (adapter)

Personal Understanding: The adapter serves as the medium between the original function and the new function. that is to say, the new function must call some of the original functions. This improves code reusability. (If you do not understand this, please give me some advice. thank you) Class errorObject { Private $ __error; Public function _ construct ($ error) { $ This->__ error = $ error; } Public function getError () { Return $ this->__ error; } } Class logToConsole { Private $ __errorobject; Public function _ construct ($ errorObject) { $ This->__ errorObject = $ errorObject; } Public function write () { Fwrite ("errorlog.txt", $ this->__ errorObject-> getError ()); } } Class logToCVS { Const log_location1_'log.csv '; Private $ __errorobject; Public function _ construct ($ errorObject) { $ This->__ errorObject = $ errorObject; } Public function write () { $ Line = $ this->__ errorObject-> getErrorNumber (); $ Line. = ','; $ Line. = $ this->__ errorObject-> getErrorText (); $ Line. = "\ n "; File_put_contents (self: LOG_LOCATION, $ line, FILE_APPEND ); } } Class logToCSVAdapter extends errorObject {// adapter Private $ _ errorNumber, $ _ errorText; Public function _ construct ($ error) { Parent: _ construct ($ error ); $ Parts = explode (":", $ this-> getError ()); $ This-> _ errorNumber = $ parts [0]; $ This-> _ errorText = $ parts [1]; } Public function getErrorNumber () { Return $ this-> _ errorNumber; } Public function getErrorText () { Return $ this-> _ errorText; } } // Write error information to txt $ Error = new errorObject ("404: not fuond "); $ Log = new logToConsole ($ error ); $ Log-> write (); // Write error information into csv $ Error = new logToCSVAdapter ("404: not fuond "); $ Log = new logToCVS ($ error ); $ Log-> write ();