<?php\ninterface Country\n{\n public function talk();\n}\n\nclass Myanmar implements Country\n{\n public function talk()\n {\n return \"Mingalarpr\";\n }\n}\n\nclass Japan implements Country\n{\n public function talk()\n {\n return \"ko ni chi wa\";\n }\n}\n?>\n<\/code><\/pre>\n\n\n\nThere is an interface called Country and two of the concrete classes called Myanmar and Japan implemented it. The type of two concrete classes, Myanmar & Japan are same as they are the country but the function called talk<\/strong> inside their classes will be different depending on the country.<\/p>\n\n\n\n$myanmar = new Myanmar();\n$japan = new Japan();\n\necho $myanmar->talk(); \/\/output - Mingalarpr\necho $japan->talk(); \/\/output - ko ni chi wa<\/code><\/pre>\n\n\n\nAs I said earlier before their talk <\/strong>function is different. That is called dynamic polymorphism. Concrete classes are sharing the same interface as they are common in type but different in functionalities.<\/p>\n\n\n\nThere is one more polymorphism called static polymorphism. This can be achieved using method overloading. We will use __call <\/strong>magic method as we are writing in PHP.<\/p>\n\n\n\n<?php\n\nclass Talk\n{\n function __call($name,$arg){\n switch(count($arg)){\n case 1 : return $arg[0];\n case 2 : return $arg[0] . '&' .$arg[1];\n }\n }\n}\n\n$talk = new Talk();\necho $talk->lang(\"Myanmar\"); \/\/output - Myanmar\necho $talk->lang(\"Myanmar\",\"Japan\"); \/\/output Myanmar & Japan<\/code><\/pre>\n\n\n\nThere are different return depending on the method arguments. The class talk<\/strong> can be adaptable depending on the function arguments which is called static polymorphism.<\/p>\n\n\n\nYou can see the magic method __call reference here.<\/p>\n\n\n\n
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