Detailed explanation of __invoke() method in PHP

__invoke(), the response method when calling an object by calling a function

Function:

When trying to call a function When calling an object, the __invoke() method is automatically called.

Note:

This feature is only valid in PHP 5.3.0 and above.

Go directly to the code:

<?php
class Person
{
    public $sex;
    public $name;
    public $age;
    public function __construct($name="",  $age=25, $sex=&#39;男&#39;)
    {
        $this->name = $name;
        $this->age  = $age;
        $this->sex  = $sex;
    }
    public function __invoke() {
        echo &#39;这可是一个对象哦&#39;;
    }
}
$person = new Person(&#39;小明&#39;); // 初始赋值
$person();

View the running results:

这可是一个对象哦

Of course, if you insist on using the object as a function method, you will get the following results:

Fatal error: Function name must be a string in D:\phpStudy\WWW\test\index.php on line 18

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