<?

//  composer require php-mock/php-mock    
use phpmock\MockBuilder;

 $builder = new MockBuilder();
        
         $builder->setNamespace(__NAMESPACE__)
            ->setName("time")
            ->setFunction(
                function () {
                    return 1417011228;
                }
            );
       /*  OR alternatively 
                 $builder->setNamespace(__NAMESPACE__)
            ->setName("time")
            ->setFunctionProvider(new FixedValueFunction(1417011228));
       


        */


        $mock = $builder->build();
        $mock->enable();
        $this->assertEquals(1417011228,time());