Enables your PHP object to be foreach, with the property being decorated with private

Play a game when you are bored. Traversing an object is simply a matter of iterating through the properties of a particular array type in the object. PHP5 can be directly foreach, but private members of the class cannot access it. The object-oriented principle also does not allow class members to be directly accessed externally. /* * @class Sample * @remark traversing an object is simply an array of variables in that object; To enable the object to be traversed, implement the iterator interface */ Class Sample implements iterator { Private $v 1 = ' 123 '; Private $v 2 = ' abc '; Private $v 3 = Array (1, 2, 3); Public Function Rewind () { /* * Get_object_vars This function check the manual to see its function * Here the sample object implementation of the defined properties, rather than dynamically generated properties $data merged into an array, * Assign this group to $data */ $this->data = Get_object_vars ($this); /* * Point a cursor in the iterator interface to the first element of the $data */ Reset ($this->data); } Public function current () {return current ($this->data);} Public Function key () {return key ($this->data);} Public function Next () {return next ($this->data);} Public Function valid () {return ($this->current ()!== false);} } $s = new Sample (); foreach ($s as $k = + $v) {echo $k. ' = '. $v. ' ';} Copy Code

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