{"id":97,"date":"2021-03-08T00:18:26","date_gmt":"2021-03-08T00:18:26","guid":{"rendered":"https:\/\/phptutorial.net\/?page_id=97"},"modified":"2021-05-21T06:47:22","modified_gmt":"2021-05-21T06:47:22","slug":"php-clone-object","status":"publish","type":"page","link":"https:\/\/www.phptutorial.net\/php-oop\/php-clone-object\/","title":{"rendered":"PHP Clone Object"},"content":{"rendered":"\n

Summary<\/strong>: in this tutorial, you will learn how to clone an object using the clone keyword in PHP.<\/p>\n\n\n\n

To clone an object<\/a> is to create a copy of an object. The clone<\/code> keyword allows you to perform a shallow copy<\/strong> of an object. By combining the clone<\/code> keyword and __clone()<\/code> magic method, you can perform a deep copy of an object.<\/p>\n\n\n\n

It’ll be easier to understand the clone, shallow copy, and deep copy concepts via examples.<\/p>\n\n\n\n

Setting up #<\/a><\/h2>\n\n\n\n

The following example defines a simple Person<\/code> class that has one property $name<\/code>. To make it simple, we’ll make the $name<\/code> property public:<\/p>\n\n\n

<?php<\/span>\n\nclass<\/span> Person<\/span>\n<\/span>{\n\tpublic<\/span> $name;\n\n\tpublic<\/span> function<\/span> __construct<\/span>($name)<\/span>\n\t<\/span>{\n\t\t$this<\/span>->name = $name;\n\t}\n}<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
Copying object via assignment #<\/a><\/h2>\n\n\n\n
The following illustrates how to copy an object via the assignment opeator<\/a>:<\/p>\n\n\n
<?php<\/span>\n\nclass<\/span> Person<\/span>\n<\/span>{\n\tpublic<\/span> $name;\n\n\tpublic<\/span> function<\/span> __construct<\/span>($name)<\/span>\n\t<\/span>{\n\t\t$this<\/span>->name = $name;\n\t}\n}\n\n$bob = new<\/span> Person('Bob'<\/span>);\n\/\/ assign bob to alex and change the name<\/span>\n$alex = $bob;\n\n\n$alex->name = 'Alex'<\/span>;\n\n\/\/ show both objects<\/span>\nvar_dump($bob);\nvar_dump($alex);<\/span><\/code><\/span>Code language:<\/span> HTML, XML<\/span> (<\/span>xml<\/span>)<\/span><\/small><\/pre>\n\n\n
Output:<\/p>\n\n\n
object(Person)#1 (1) {<\/span>\n  [\"name\"<\/span>]=> string(4<\/span>) \"Alex\"<\/span>\n}\nobject(Person)#1 (1) {<\/span>\n  [\"name\"<\/span>]=> string(4<\/span>) \"Alex\"<\/span>\n}<\/code><\/span>Code language:<\/span> PHP<\/span> (<\/span>php<\/span>)<\/span><\/small><\/pre>\n\n\n
The var_dump() shows one object with the #1.<\/p>\n\n\n\n
How it works.<\/p>\n\n\n\n