<?php class A { var $i = 0; } class B extends A { var $i = 150; } $a = new A(); $b = new B(); echo '$a->i: ', $a->i, "\n"; // 0 echo '$b->i: ', $b->i, "\n"; // 150 $a->i = 100; echo '$b->i: ', $b->i, "\n"; //150 echo '$a->i: ', $a->i, "\n"; // 100 $b->i = 50; // Ne modifie pas la propriété $i de A echo '$a->i: ', $a->i, "\n"; //100 echo '$b->i: ', $b->i, "\n"; // 50
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