How to convert array to object in php

In PHP programming, sometimes it is necessary to convert an array into an object, because objects are more convenient for operations and data storage. In this article, we'll explore how to convert an array into an object, and how to convert between the two.

Convert an array into an object

In PHP, there are many ways to convert an array into an object. We will introduce these methods one by one below.

Method 1: Force the array into an object

In PHP, you can use the following syntax to convert an array into an object.

$obj = (object) $array;

In this statement, we coerce $array into an object and assign it to $obj.

It should be noted that this method only assigns the values ​​​​in the array to the properties in the object, and cannot perform any operations on the object.

Method 2: Use the stdClass class to instantiate the object

In PHP, you can use the stdClass class to create a new empty object, and then assign the values ​​in the array to the properties of the object . The specific code is as follows.

$obj = new stdClass();
foreach($array as $key => $value){
    $obj->$key = $value;
}

In this code, we use the foreach() function to traverse the array, and then use $obj->$key to access the properties in the object and assign them to the values ​​in the array.

Method 3: Use the json_decode() function

In PHP, we can also use the json_decode() function to convert the array into an object. The specific code is as follows.

$jsonStr = json_encode($array);
$obj = json_decode($jsonStr);

In this code, we use the json_encode() function to convert the array into a json string, and then use the json_decode() function to convert the json string into an object.

It should be noted that this method is only applicable when the values ​​in the array are all basic types, and does not apply to associative arrays or nested arrays.

Convert an object into an array

When we need to convert an object into an array, PHP provides two methods: (1) use the get_object_vars() function; (2) use type casting.

Method 1: Use the get_object_vars() function

In PHP, we can use the get_object_vars() function to get all the attributes and values ​​of an object and convert them into an array. The specific code is as follows.

$arr = get_object_vars($obj);

In this code, $obj is an object and $arr is an array that contains all the properties and values ​​​​in $obj.

Method 2: Use type casting

In PHP, we can directly use type casting to convert the object into an array. The specific code is as follows.

$arr = (array) $obj;

In this code, we use (array) to force conversion of $obj to an array.

It should be noted that this method has a limitation, it can only convert the public properties in the object into values ​​in the array. Neither private nor protected properties can be converted in this way.

Conclusion

In PHP programming, converting arrays to objects and converting objects to arrays are common operations. In this article, we introduced how to use type casting, get_object_vars() function and json_decode() function to achieve these operations. At the same time, readers are also reminded of the applicable scope of the method, as well as the limitations and precautions of the method. Hope this article can be helpful to PHP programmers.

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