Online PHP editor | output for Z7Alb

<?php $class = new stdClass; $class->properties = [new stdClass,new stdClass, new stdClass]; $class->properties[0]->name = "Anne"; $class->properties[1]->name = "Bob"; $class->properties[2]->name = "Robin"; $fieldsA = []; $fieldsB = []; if ( array_walk( $class->properties, function( $o ) use ( &$fieldsA ){ $fieldsA[] = $o->name; }) ) { echo "\nMission accomplished:\n"; var_dump($fieldsA); } $fieldsB = array_map( function( $e ) { return $e->name; },$class->properties); if (count($fieldsB) > 0) { echo "\nMission accomplished:\n"; var_dump( $fieldsB ); }