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<?php class class1 { function class1() { error_log("Constuctor of class1"); } } class class2 extends class1 { } class class3 extends class2 { } class class4_working extends class3 { function class4_working() { parent::__construct(); } } class class4_notworking extends class3 { function class4_notworking() { parent::class2(); } } error_log("working"); $c = new class4_working(); error_log("notworking"); $c = new class4_notworking();
Output for git.master, git.master_jit, rfc.property-hooks
working notworking

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