The 23-year-old's previous contract at Gresty Road was due to expire at the end of the season.
Davis made his first-team debut in 2010 after coming through the club's youth system.
Crewe are currently in 20th place in the League One table, two points above the relegation zone.
They return to league action on Saturday with the visit of MK Dons.
Restore Data
| Team | P | W | D | L | F | A | GD | PTS | |
| 1 | Gillingham | 9 | 6 | 1 | 2 | 12 | 3 | 9 | 19 |
| 2 | Notts County | 9 | 5 | 3 | 1 | 17 | 8 | 9 | 18 |
| 3 | Walsall | 9 | 6 | 0 | 3 | 17 | 10 | 7 | 18 |
| 4 | BarrowBarrow | 9 | 5 | 1 | 3 | 11 | 6 | 5 | 16 |
| 5 | Doncaster RoversDoncaster | 9 | 5 | 1 | 3 | 12 | 12 | 0 | 16 |
| 6 | Fleetwood TownFleetwood | 8 | 4 | 3 | 1 | 16 | 9 | 7 | 15 |
| 7 | Port Vale | 9 | 4 | 3 | 2 | 14 | 12 | 2 | 15 |
| 8 | Grimsby Town | 9 | 5 | 0 | 4 | 13 | 14 | -1 | 15 |
| 9 | Newport CountyNewport | 9 | 5 | 0 | 4 | 15 | 17 | -2 | 15 |
| 10 | Chesterfield | 9 | 3 | 4 | 2 | 15 | 8 | 7 | 13 |
| 11 | AFC Wimbledon | 6 | 4 | 1 | 1 | 9 | 4 | 5 | 13 |
| 12 | Crewe AlexandraCrewe | 8 | 4 | 1 | 3 | 8 | 9 | -1 | 13 |
| 13 | Bradford CityBradford | 9 | 3 | 3 | 3 | 11 | 10 | 1 | 12 |
| 14 | MK Dons | 9 | 3 | 2 | 4 | 12 | 11 | 1 | 11 |
| 15 | Colchester UnitedColchester | 9 | 2 | 4 | 3 | 13 | 15 | -2 | 10 |
| 16 | Cheltenham TownCheltenham | 9 | 3 | 1 | 5 | 11 | 14 | -3 | 10 |
| 17 | Tranmere RoversTranmere | 8 | 2 | 4 | 2 | 4 | 8 | -4 | 10 |
| 18 | Harrogate TownHarrogate | 9 | 3 | 1 | 5 | 9 | 16 | -7 | 10 |
| 19 | Bromley | 9 | 2 | 3 | 4 | 12 | 14 | -2 | 9 |
| 20 | Salford City | 8 | 2 | 3 | 3 | 5 | 9 | -4 | 9 |
| 21 | Swindon TownSwindon | 9 | 1 | 4 | 4 | 9 | 13 | -4 | 7 |
| 22 | Carlisle UnitedCarlisle | 9 | 2 | 0 | 7 | 10 | 19 | -9 | 6 |
| 23 | Morecambe | 9 | 0 | 4 | 5 | 7 | 12 | -5 | 4 |
| 24 | Accrington StanleyAccrington | 8 | 0 | 3 | 5 | 9 | 18 | -9 | 3 |
| > League Two Full Table | |||||||||
