redis zset Introduction

Key = $ 'Key'; 

// add 
zadd ($ key, scores, identity) 

// remove a logo 
zrem ($ key, identification) 

// a ranking queries identified (starting from 0 in the output of all to add a time) 
zrevrank ($ Key, identification) 

// take current identity score 
zscore ($ key, identification) 

// all ranked in descending 
zrevrange ($ Key, 0, -1) 

// increment the specified identifier scores 
zIncrBy ($ key, number, logo) 

// determine whether there is a key 
zcard ($ key)