将对象转换为数组

I am working with WordPress and since I don't believe it is possible to sort object details, I was wondering how to go about converting my Object to an Array, so that sorting can be possible.

Any help or guidance would be greatly appreciated.

I am using the WP function get_categories();

The complete content of $category is:

$category->term_id
$category->name
$category->slug
$category->term_group
$category->term_taxonomy_id
$category->taxonomy
$category->description
$category->parent
$category->count
$category->cat_ID
$category->category_count
$category->category_description
$category->cat_name
$category->category_nicename
$category->category_parent

If the object is not too complex (in terms of nesting) you can cast the class to an array:

$example = new StdClass();
$example->foo = 'bar';

var_dump((array) $example);

outputs:

array(1) { ["foo"]=> string(3) "bar" } 

However this will only convert the base level. If you have nested objects such as

$example = new StdClass();
$example->foo = 'bar';
$example->bar = new StdClass();
$example->bar->blah = 'some value';

var_dump((array) $example);

Then only the base object will be cast to an array.

array(2) { 
  ["foo"]=> string(3) "bar" 
  ["bar"]=> object(stdClass)#2 (1) { 
    ["blah"]=> string(10) "some value" 
  }
} 

In order to go deeper, you would have to use recursion. There is a good example of an object to array conversion here.

as simple as

$array = (array)$object;

http://www.php.net/manual/en/language.types.array.php#language.types.array.casting

To convert an object to array you can use get_object_vars() (PHP manual):

$categoryVars = get_object_vars($category)

To convert the entire object and all it's properties to arrays, you can use this clunky function I've had kicking around for a while:

function object_to_array($object)
{
    if (is_array($object) OR is_object($object))
    {
        $result = array(); 
        foreach($object as $key => $value)
        { 
            $result[$key] = object_to_array($value); 
        }
        return $result;
    }
    return $object;
}

Demo: http://codepad.org/Tr8rktjN

But for your example, with that data, you should be able to just cast to array as others have already said.

$array = (array) $object;

To add to @galen

<?php 
    $categories = get_categories(); 
    $array = (array)$categories;  
?>

A less clunky way might be:

function objectToArray($object) 
{ 
    if(!is_object( $object ) && !is_array( $object ))
    { 
        return $object; 
    } 
    if(is_object($object) ) 
    { 
        $object = get_object_vars( $object ); 
    } 
    return array_map('objectToArray', $object ); 
}

(Sourced from http://www.sitepoint.com/forums/showthread.php?438748-convert-object-to-array) Note, if you'd like this as a method in a class, change the last line to:

return array_map(array($this, __FUNCTION__), $object ); 

$array = json_decode(json_encode($object), true);