How to define an object array in php

In PHP, object array is a very common data type. It consists of a set of objects, each object has its own properties and methods. Defining an object array allows us to operate on a group of objects more conveniently, simplifying the logic and readability of the code. Next, let's take a look at how to define an object array in PHP.

In PHP, you can define an empty object array through the following code:

$object_array = array();

In this example, we define an object array named $object_array and initialize it is an empty array. In order to add objects to this array, we need to first create an object class, use this class to create the required objects, and then add these objects to the object array.

For example, the following is a simple PHP class definition:

class Person {
   public $name;
   public $age;
   public function __construct($name, $age) {
      $this->name = $name;
      $this->age = $age;
   }
}

This class is called Person, which has two attributes: name and age, and a constructor __construct(), The values ​​used to initialize these two properties. Now, we create a Person object, and then add this object to the $object_array object array:

$person1 = new Person('张三', 30);
$person2 = new Person('李四', 25);
$person3 = new Person('王五', 28);
$object_array = array($person1, $person2, $person3);

In this example, we create three Person objects $person1, $person2 and $ person3 and then add them to the $object_array array. When creating an object, we need to pass parameters to the constructor in order to initialize the values ​​of the object properties.

Once we define the $object_array object array, we can use a foreach loop to iterate over its elements in order to access the properties and methods of each object. For example, suppose we have defined the $object_array object array, and now need to iterate through the array and output the name and age of each object:

foreach($object_array as $person) {
   echo $person->name."\t".$person->age."\n";
}

In this example, we use a foreach loop to traverse the $object_array array every element in . On each iteration, the $person variable is the current object, and we can use it to access the object's properties and methods, such as $person->name and $person->age.

Summary:

Defining an object array allows us to operate on a group of objects more conveniently, simplifying the logic and readability of the code. In PHP, we need to first define an object's class, then create objects and add them to the object array. Once the array of objects is defined, we can use a foreach loop to access the properties and methods of each object in the array.

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