How to declare an object in php

To create a new object object in PHP, use the new statement to instantiate a class:

<?php
class foo
{
    function do_foo()
    {
        echo "Doing foo."; 
    }
}

$bar = new foo;
$bar->do_foo();
?>

After instantiating the object, we can use the object to call members Method, the member method of this object can only operate the member variables of this object:

// 调用成员函数，设置标题和URL
$runoob->setTitle( "php中文网" );
$taobao->setTitle( "淘宝" );
$google->setTitle( "Google 搜索" );

$runoob->setUrl( 'https://www.php.cn/' );
$taobao->setUrl( 'www.taobao.com' );
$google->setUrl( 'www.google.com' );

// 调用成员函数，获取标题和URL
$runoob->getTitle();
$taobao->getTitle();
$google->getTitle();

$runoob->getUrl();
$taobao->getUrl();
$google->getUrl();

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