PHP object to array method

PHP object to array method

The method of converting an object to an array in PHP can be achieved by using the "get_object_vars()" function , the syntax of this function is "get_object_vars($obj)", its parameter $obj represents the object that needs to be converted, and the return value of this function is an associative array composed of object attributes.

get_object_vars Description

get_object_vars ( object $obj ) : array

Returns an associative array composed of attributes defined in the object specified by obj.

Note: In versions prior to PHP 4.2.0, if variables declared in the obj object instance were not assigned a value, they would not be in the returned array. After PHP 4.2.0, these variables will be assigned NULL values ​​as key names.

Usage example

<?php
class Point2D {
    var $x, $y;
    var $label;

    function Point2D($x, $y)
    {
        $this->x = $x;
        $this->y = $y;
    }

    function setLabel($label)
    {
        $this->label = $label;
    }

    function getPoint()
    {
        return array("x" => $this->x,
                     "y" => $this->y,
                     "label" => $this->label);
    }
}

// "$label" is declared but not defined
$p1 = new Point2D(1.233, 3.445);
print_r(get_object_vars($p1));

$p1->setLabel("point #1");
print_r(get_object_vars($p1));

?>

Print results:

 Array
 (
     [x] => 1.233
     [y] => 3.445
     [label] =>
 )

 Array
 (
     [x] => 1.233
     [y] => 3.445
     [label] => point #1
 )

The above is the detailed content of PHP object to array method. For more information, please follow other related articles on the PHP Chinese website!