<?php class C { function save($a, $b, $c=NULL) { echo "save something"; return 1; // id } } class D extends C { function saveD($a, $b){ return parent::save($a,$b); } } class X extends D { function save($a, $b, $c){ // do little processing with $c return $this->saveD($a,$b); } } $x = new X(); $x->save(1,2,"aaaa");
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