In texts, numbers sometimes replace sounds, for example:
1: some1 (someone), no1 (no one)
2: too, two, to, 2day (today), 2morrow (tomorrow), 2nite (tonight)
4: four, for, b4 (before), 4ever (forever), be4u (before you), 4u (for you)
8: eight, ni8 (night), gr8 (great), L8r (later), h8 (hate), w8 (weight), sk8 (skate), sk8er (skater)
9: 9t (night), 9ce (nice)
Sometimes even combinations of these are used, for example ‘2good2b4gotten’ (too good to be forgotten), ‘b4u2’ (before you too).