Fatal error: Uncaught TypeError: date(): Argument #2 ($timestamp) must be of type ?int, string given in /in/vUbLB:4
Stack trace:
#0 /in/vUbLB(4): date('Y_m_d', '2015-11-12 23:4...')
#1 {main}
thrown in /in/vUbLB on line 4
Process exited with code 255.