Online PHP editor | output for Z7C8W

<?php $t = array( '3700860004152', '3700860001113', '3700860001199', '3700860000680', '3700860001236', '3700860002196', '3700860002103', '3700860002257', '3700860001861', '3700860005005', '3700860004053', '3700860004251', '3700860003407', '3700860002363', '3700860004022', '3700860002387', '3700860001908', '3700860006019', '3700860001403', '3700860002219', '3700860003254', '3700860001946', '3700860001847', '3700860006088', '3700860003223', '3700860000666', '3700860002080', '3700860002998', '3700860003421', '3700860001984', '3700860005074', '3700860000826', '3700860004299', '3700860001281', '3700860000543', '3700860002912', '3700860003971', '3700860001151', '3700860001113', '3700860004114', '3700860002271', '3700860001250', '3700860001069', '3700860006033', '3700860001045', '3700860001007', '3700860003223', '3700860002950', '3700860001922', '3700860002936', '3700860004961', '3700860004046', '3700860003254', '3700860000543', '3700860002325', '3700860003162', '3700860006132', '3700860003261', '3700860003179', '3700860005029', '3700860000642', '3700860000888', '3700860002301', '3700860001304', '3700860005944', '3700860005562', '3700860000727', '3700860002424', '3700860002042', '3700860001137', '3700860006064', '3700860005968', '3700860004961', '3700860000567', '3700860003551', '3700860001328', '3700860004275', '3700860001960', '3700860005548', '3700860006071', '3700860002165', '3700860003247', '3700860005050', '3700860000789', '3700860002028', '3700860002493', '3700860003186', '3700860005364', '3700860004008', '3700860005463', '3700860000765', '3700860004015', '3700860003889', '3700860000802', '3700860002325', '3700860000963', '3700860005524', '3700860003483', '3700860003551', '3700860000949', '3700860003193', '3700860001809', '3700860004145', '3700860001366', '3700860001847', '3700860002417', '3700860004251', '3700860005067', '3700860006101', '3700860000925', '3700860000567', '3700860002363', '3700860002080', '3700860001380', '3700860001137', '3700860001151', '3700860003889', '3700860000741', '3700860003421', '3700860004985', '3700860002103', '3700860004299', '3700860002004', '3700860003186', '3700860002042', '3700860005548', '3700860005074', '3700860003865', '3700860003469', '3700860002424', '3700860001083', '3700860002530', '3700860002233', '3700860001984', '3700860002196', '3700860002271', '3700860003445', '3700860005968', '3700860001946', '3700860005029', '3700860000802', '3700860003032', '3700860000703', '3700860003230', '3700860006101', '3700860002349', '3700860002301', '3700860003032', '3700860005005', '3700860000604', '3700860000529', '3700860005104', '3700860004237', '3700860003964' ); $t = array_unique($t); echo count($t);