Online PHP editor | refs for BY9u7

<?php class Apm { public $duration; function __construct($duration) { $this->duration = $duration; } } $apps = [ "09:00" => new Apm(45), "09:15" => "", // I want to delete this row -> 15 minutes "09:30" => "", // I want to delete this row -> 30 minutes end of the appointment "09:45" => "", "10:00" => new Apm(60), "10:15" => "", // I want to delete this row -> 15 minutes "10:30" => "", // I want to delete this row -> 30 minutes "10:45" => "", // I want to delete this row -> 45 minutes "11:00" => "", // I want to delete this row -> 60 minutes end of the appointment "11:15" => "", "11:30" => "", "11:45" => new Apm(90), ]; $duration = 0; $filtered = array_filter( $apps, function ($apm) use (&$duration) { if ($duration === 0) { if (!empty($apm->duration)) { $duration = $apm->duration - 15; return true; } else { return true; } } else { $duration -= 15; return false; } } ); print_r($filtered);