How to convert string into object array in php

With the development of web applications, more and more data in string form need to be converted into object arrays for easy operation. As a powerful web development language, PHP behaves naturally in data processing. This article will introduce how to convert a string into an array of objects.

1. Basic concepts

1. Object

In object-oriented programming, an object is an abstract description of an entity in the real world. Objects are composed of properties and methods. Properties describe the state of the object, and methods describe the behavior of the object.

2. Array

In PHP, an array is a data type that can store any type of data. Arrays consist of indexes and values, with indexes used to access values.

3. String

String is a data type commonly used in programming. It is composed of characters (letters, numbers, symbols, etc.) and is an immutable data type.

4. Serialization

Serialization is the process of converting an object or array into string form so that it can be transmitted or stored.

5. Deserialization

Deserialization is the process of converting an object or array in the form of a string into the original data structure.

2. Implementation of converting strings into object arrays

In PHP, strings can be converted into object arrays through serialization and deserialization. PHP provides the serialize() function and unserialize() function to implement two processes respectively.

1. Serialization

Serialization is to convert the PHP object or array type into a string so that it can be transmitted or stored. During serialization, PHP will store the attributes and indexes in the object or array and their corresponding values ​​​​in a string. This string can be transmitted through the network or file to save data or transmit data.

The following is an example of using the serialize() function to store an object as a string:

class Person{
    public $name;
    public $age;
    public $gender;
}
$person = new Person();//创建一个对象
$person->name = 'Tom';//为对象属性赋值
$person->age = 20;
$person->gender = 'Male';
$serialized = serialize($person);//将对象序列化为字符串
echo $serialized;//输出存储的字符串

In the above code, we first create an object of the Person class and assign values ​​to its properties . Then, we serialize the object into a string and use the echo statement to output the string. The output result is:

O:6:"Person":3:{s:4:"name";s:3:"Tom";s:3:"age";i:20;s:6:"gender";s:4:"Male";}

This string contains the attributes and values ​​of the object we created, as well as the class name and number. .

2. Deserialization

When we need to convert a string into an object, we use the unserialize() function. The unserialize() function can convert a string into an object or array.

The following is an example. We convert an object stored as a string into an instantiated object through the unserialize() function:

$serialized = 'O:6:"Person":3:{s:4:"name";s:3:"Tom";s:3:"age";i:20;s:6:"gender";s:4:"Male";}';
$person = unserialize($serialized);
echo $person->name;//输出对象的属性值
echo $person->age;
echo $person->gender;

In the above code, we first define a String $serialized, this string is the string obtained after serialization of the previously defined $person object. Then, we use the unserialize() function to convert this string into an object and output the object's attribute values.

3. Conclusion

Through this article, we can see that PHP provides very convenient serialization and deserialization functions, which can convert objects or arrays into strings for transmission or storage. , you can also convert strings into objects or arrays for operation and processing. This conversion method is widely used in Web applications and data exchange.

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