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run code in 200+ php & hhvm versions
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<?php $organizations = array( (object)array( 'id' => 1 ), (object)array( 'id' => 2 ), (object)array( 'id' => 3 ), ); $organizationIds = array_map(function ($organization) { return $organization->id; }, $organizations); var_dump($organizationIds);
based on OJZNE
Output for 5.6.0 - 5.6.30, hhvm-3.15.4, 7.0.0 - 7.3.0rc3
array(3) { [0]=> int(1) [1]=> int(2) [2]=> int(3) }