PHP Object Clone Clone Usage Example

This example describes the PHP object clone clone usage. Share to everyone for your reference, as follows:

Shallow clone: Only non-object non-resource data in the cloned object, that is, the object's property is stored in the object type, the clone will appear incomplete

<?phpclass b{Public $val = 10;} Class a{Public $val =, public $b, Public function __construct () {  $this->b = new B ();}} $obj _a = new A () $obj _b = Clone $obj _a; $obj _a->val = $obj _a->b->val = 40;var_dump ($obj _a); Echo ' <br> '; v Ar_dump ($obj _b);

The results of the operation are as follows:

Object (a) [1] public ' val ' = = int-Public ' b ' = = object (b) [2] public  ' val ' = + int + object (A) [3] public ' VA L ' = = int public ' b ' = = object (b) [2] public  ' val ' + int 40

Deep Clone: All property Data of an object is copied completely, need to use magic Method __clone (), and implement deep clone inside

<?phpclass b{Public $val = 10;} Class a{Public $val =, public $b, Public function __construct () {  $this->b = new B (),} public function __clone ( {  $this->b = Clone $this->b;}} $obj _a = new A () $obj _b = Clone $obj _a; $obj _a->val = $obj _a->b->val = 40;var_dump ($obj _a); Echo ' <br> '; v Ar_dump ($obj _b);

The results of the operation are as follows:

Object (a) [1] public ' val ' = = int-Public ' b ' = = object (b) [2] public  ' val ' = + int + object (A) [3] public ' VA L ' = = int public ' b ' = = object (b) [4] public  ' val ' + int 10

I hope this article is helpful to you in PHP programming.