How to convert object to string or array in php

When developing PHP, you often encounter situations where you need to convert objects into strings or arrays. At this time, we need to use some functions and techniques in PHP. This article will explain how to convert an object to a string or array and give some sample code.

1. Convert an object to a string

In PHP, we can convert an object to a string by passing it to the echo function. However, this approach only works for simple objects. If you want to convert a complex object to a string, you need to use the __toString() method in PHP.

__toString() method is one of the magic methods in PHP, used to convert objects into strings. With this method, we can easily convert the object into a string.

The sample code is as follows:

class Person {
  public $name;
  public $age;

  public function __toString() {
    return $this->name . ", " . $this->age;
  }
}

$person = new Person();
$person->name = "Tom";
$person->age = 30;

echo $person; //输出Tom, 30

2. Convert objects to arrays

In PHP, you can use the function get_object_vars() to convert simple objects into arrays. The get_object_vars() function returns an array containing all the properties of the object and their values.

The sample code is as follows:

class Person {
  public $name;
  public $age;

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

$person = new Person("Tom", 30);

$array = get_object_vars($person);

print_r($array); //输出Array([name] => Tom [age] => 30)

3. Convert object array to string array

We can also convert object array to string array. The array_map() function in PHP can help us accomplish this task. The array_map() function passes each element of one or more arrays to the specified function and returns a new array whose elements are the return values ​​of each function.

The sample code is as follows:

class Person {
  public $name;
  public $age;

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

  public function toString() {
    return $this->name . ", " . $this->age;
  }
}

$person1 = new Person("Tom", 30);
$person2 = new Person("Jerry", 35);

$array = array($person1, $person2);

$stringArray = array_map(function($person) {
  return $person->toString();
}, $array);

print_r($stringArray); //输出Array([0] => Tom, 30 [1] => Jerry, 35)

The above is how PHP converts objects into strings, arrays, and object arrays. Through these techniques, we can easily complete the conversion between objects, strings, and arrays, and play their role in development.

The above is the detailed content of How to convert object to string or array in php. For more information, please follow other related articles on the PHP Chinese website!