php convert array into object array object

In PHP, we often use arrays and objects. Arrays can be used to conveniently store a set of related data, and objects can be used to store some attributes and behaviors. Sometimes we need to convert an array into an object, or an object into an associative array.

This article will introduce how to use PHP functions to convert an array into an object array, and how to convert an object into an associative array.

Convert an array into an object array

In PHP, we can use cast to convert an array into an object. Here is a simple example:

$arr = ['name' => 'Jack', 'age' => 18];
$obj = (object) $arr;

In this example, we define an associative array $arr, and then use (object) to convert it into An object $obj. Now we can access the data in the array through the properties $name and $age of $obj:

echo $obj->name; // Jack
echo $obj->age; // 18

But if there are Multiple subarrays, we need to recursively process each subarray to convert them all into objects. Here is a recursive function to implement:

function arrayToObject($array) {
    if (!is_array($array)) {
        return $array;
    }
    $object = new stdClass();
    if (is_array($array) && count($array) > 0) {
        foreach ($array as $name => $value) {
            $name = strtolower(trim($name));
            if (!empty($name)) {
                $object->$name = arrayToObject($value);
            }
        }
        return $object;
    }
    else {
        return FALSE;
    }
}

This function implements the function of converting an array into an object. It first checks whether the incoming parameter is an array, and if not, it returns directly; if it is, it creates a new object. Then for each element in the array, convert it into a lowercase property name, and call the arrayToObject function recursively. Finally returns the converted object.

The following is an example of usage:

$data = [
    'name' => 'Jack',
    'age' => 18,
    'address' => [
        'state' => 'CA',
        'city' => 'San Francisco'
    ]
];
$obj = arrayToObject($data);
echo $obj->name; // Jack
echo $obj->address->state; // CA

In this example, we define a multidimensional array $data, which contains a subarray address . Then use the arrayToObject function to convert it into an object, and finally access the data through the properties of $obj.

Convert an object into an associative array

The method of converting an object into an associative array is relatively simple. We can use the object's get_object_vars method to convert it into an array. The following is an example:

class Person {
    public $name;
    public $age;
    public $address;

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

$person = new Person('Jack', 18, 'San Francisco');
$arr = get_object_vars($person);
print_r($arr);

In this example, we define a Person class, which contains three attributes: name, age and address. Then a $person object is created and converted into an array $arr using get_object_vars. Finally use print_r to output the array.

The output results are as follows:

Array
(
    [name] => Jack
    [age] => 18
    [address] => San Francisco
)

Conclusion

In PHP, we can convert an array into an object through forced type conversion, or we can use get_object_vars Method converts an object into an associative array. For multidimensional arrays and objects, we need recursive processing to achieve conversion. Understanding these techniques can help us better handle arrays and objects in PHP.

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