Convert stdClass object to array in PHP
PhpArraysPhp Problem Overview
I fetch post_id from postmeta as:
$post_id = $wpdb->get_results("SELECT post_id FROM $wpdb->postmeta WHERE (meta_key = 'mfn-post-link1' AND meta_value = '". $from ."')");
when i try print_r($post_id);
I have array like this:
Array
(
[0] => stdClass Object
(
[post_id] => 140
)
[1] => stdClass Object
(
[post_id] => 141
)
[2] => stdClass Object
(
[post_id] => 142
)
)
and i dont know how to traverse it, and how could I get array like this
Array
(
[0] => 140
[1] => 141
[2] => 142
)
Any idea how can I do this?
Php Solutions
Solution 1 - Php
The easiest way is to JSON-encode your object and then decode it back to an array:
$array = json_decode(json_encode($object), true);
Or if you prefer, you can traverse the object manually, too:
foreach ($object as $value)
$array[] = $value->post_id;
Solution 2 - Php
Very simple, first turn your object into a json object, this will return a string of your object into a JSON representative.
Take that result and decode with an extra parameter of true, where it will convert to associative array
$array = json_decode(json_encode($oObject),true);
Solution 3 - Php
Try this:
$new_array = objectToArray($yourObject);
function objectToArray($d)
{
if (is_object($d)) {
// Gets the properties of the given object
// with get_object_vars function
$d = get_object_vars($d);
}
if (is_array($d)) {
/*
* Return array converted to object
* Using __FUNCTION__ (Magic constant)
* for recursive call
*/
return array_map(__FUNCTION__, $d);
} else {
// Return array
return $d;
}
}
Solution 4 - Php
You can convert an std object to array like this:
$objectToArray = (array)$object;
Solution 5 - Php
There are two simple ways to convert stdClass Object to an Array
$array = get_object_vars($obj);
and other is
$array = json_decode(json_encode($obj), true);
or you can simply create array using foreach loop
$array = array();
foreach($obj as $key){
$array[] = $key;
}
print_r($array);
Solution 6 - Php
For one-dimensional arrays:
$array = (array)$class;
For multi-dimensional array:
function stdToArray($obj){
$reaged = (array)$obj;
foreach($reaged as $key => &$field){
if(is_object($field))$field = stdToArray($field);
}
return $reaged;
}
Solution 7 - Php
$wpdb->get_results("SELECT ...", ARRAY_A);
ARRAY_A is a "output_type" argument. It can be one of four pre-defined constants (defaults to OBJECT):
OBJECT - result will be output as a numerically indexed array of row objects.
OBJECT_K - result will be output as an associative array of row objects, using first columns values as keys (duplicates will be discarded).
ARRAY_A - result will be output as an numerically indexed array of associative arrays, using column names as keys.
ARRAY_N - result will be output as a numerically indexed array of numerically indexed arrays.
Solution 8 - Php
While converting a STD class object to array.Cast the object to array by using array function of php.
Try out with following code snippet.
/*** cast the object ***/
foreach($stdArray as $key => $value)
{
$stdArray[$key] = (array) $value;
}
/*** show the results ***/
print_r( $stdArray );
Solution 9 - Php
You can try this:
$aInitialArray = array_map(function($oObject){
$aConverted = get_object_vars($oObject);
return $aConverted['post_id'];
}, $aInitialArray);
Solution 10 - Php
if you have an array and array element is stdClass item then this is the solution:
foreach($post_id as $key=>$item){
$post_id[$key] = (array)$item;
}
now the stdClass has been replaced with an array inside the array as new array element
Solution 11 - Php
Using the ArrayObject from Std or building your own
> (new \ArrayObject($existingStdClass))
you can use the build in method on the new class:
> getArrayCopy()
or pass the new object to
> iterator_to_array
Solution 12 - Php
Lets assume $post_id is array of $item
$post_id = array_map(function($item){
return $item->{'post_id'};
},$post_id);
strong text
Solution 13 - Php
I have a function myOrderId($_GET['ID']); which returns multidimensional OBJ. as a String.
None of other 1 liner wokred for me.
This both worked:
$array = (array)json_decode(myOrderId($_GET['ID']), True);
$array = json_decode(json_decode(json_encode(myOrderId($_GET['ID']))), True);