The role of model object $origin object in thinkphp frame

In the model constructor, the $origin is initialized in the following way

if (Is_object ($data)) {      $this->data = Get_object_vars ($data);} else {      $this->data = $data;} Record raw Data $this->origin = $this->data;

$origin save an array, because if you save an object, because the object is a reference, the modification will change the $data and $origin at the same time.

The effect we need is to $origin the original data at the time of the initial initialization.

In Thinkphp's save function, you can compare $data and $origin to find out which fields have been modified so that you can update only the modified fields when you update them.

$data = Array_udiff_assoc ($this->data, $this->origin, function ($a, $b) {       if (empty ($a) | | empty ($b)) &&am P $a!== $b) {              return 1;       }       return Is_object ($a) | | $a! = $b? 1:0;});

The role of model object $origin object in thinkphp frame