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<?php $post_id = array((object) (array( 'post_id' => 140, )), (object) (array( 'post_id' => 141, )), (object) (array( 'post_id' => 142, ))); print_r($post_id); foreach ($post_id as $key => $value) { $result[] = $value->post_id; } print_r($result);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
Array ( [0] => stdClass Object ( [post_id] => 140 ) [1] => stdClass Object ( [post_id] => 141 ) [2] => stdClass Object ( [post_id] => 142 ) ) Array ( [0] => 140 [1] => 141 [2] => 142 )

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