Learn more about the '->' symbol in php objects

PHP is a very popular programming language. It is a server-side scripting language that is widely used in the field of web programming. In PHP programming, objects and their properties and methods are often used.

In PHP, the properties and methods of an object can be accessed through the "->" symbol. But before understanding, you need to first understand what an object is.

Object refers to an entity with certain properties and behaviors in the real world. It is an instance in the program. It has a set of properties and methods and can be used through instantiation.

In PHP, after creating an object, you can use the "->" symbol to operate the object's properties and methods. This symbol is actually the operator required to access the object's properties and methods. For example:

class Person {
    public $name;
    public $age;

    public function sayHello() {
        echo "Hello!";
    }
}
$p = new Person();
$p->name = "John";
$p->age = 30;
$p->sayHello();

In the above code, we created a class named Person, which contains two attributes $name and $age, and a method sayHello(). Then we created a $p object, assigned values ​​to its properties, and then called the object's sayHello() method. As you can see, when accessing object properties and methods, we need to use the "->" symbol.

Simply put, the symbol "->" is used in PHP to access the properties and methods of objects. It allows programmers to easily manipulate objects and implement operations on properties and behaviors.

In PHP object programming, the "->" symbol is often used together with the "::" symbol to indicate calls to objects and classes. For example:

class Person {
    public static $name;

    public static function sayHello() {
        echo "Hello!";
    }
}
Person::$name = "John";
Person::sayHello();

In the above code, we define a static property $name and a static method sayHello(). When accessing static properties and static methods, you need to use the "::" symbol. It can be seen that although the static properties and methods of the class are accessed, the "->" symbol is still used. This is because in PHP, static properties and methods are accessed in the same way as instance properties and methods.

In short, the "->" symbol is an essential symbol in PHP object programming. It allows programmers to easily access the properties and methods in the object and implement operations on the object.

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