redis_zcard()

    
Also See:   redis_append redis_auth redis_bgsave redis_bitcount redis_bitfield redis_bitop redis_bitpos redis_blpop redis_brpop redis_brpoplpush redis_client_getname redis_client_kill redis_client_list redis_client_pause redis_client_setname redis_command redis_command_count redis_command_getkeys redis_command_info redis_config_get redis_config_resetstat redis_config_rewrite redis_config_set redis_connect redis_dbsize redis_debug_object redis_debug_segfault redis_decr redis_decrby redis_del redis_discard redis_disconnect redis_dump redis_echo redis_eval redis_evalsha redis_evalsha_array redis_eval_array redis_exec redis_exists redis_expire redis_expireat redis_flushall redis_flushdb redis_geoadd redis_geodist redis_geohash redis_geopos redis_georadius redis_georadiusbymember redis_georadiusbymemberstore redis_georadiusbymemberstoredist redis_georadiusstore redis_georadiusstoredist redis_get redis_getbit redis_getrange redis_getset redis_hdel redis_hexists redis_hget redis_hgetall redis_hincrby redis_hincrbyfloat redis_hkeys redis_hlen redis_hmget redis_hmset redis_hscan redis_hset redis_hsetnx redis_hstrlen redis_hvals redis_incr redis_incrby redis_incrbyfloat redis_info redis_info_section redis_keys redis_lastsave redis_last_error redis_lindex redis_linsert_after redis_linsert_before redis_llen redis_lpop redis_lpush redis_lpushx redis_lrange redis_lrem redis_lset redis_ltrim redis_mget redis_migrate redis_move redis_mset redis_msetnx redis_multi redis_object_encoding redis_object_idletime redis_object_refcount redis_persist redis_pexpire redis_pexpireat redis_pfadd redis_pfcount redis_pfmerge redis_ping redis_ping_message redis_pttl redis_quit redis_randomkey redis_rename redis_renamenx redis_restore redis_role redis_rpop redis_rpoplpush redis_rpush redis_rpushx redis_sadd redis_save redis_scan redis_scard redis_script_exists redis_script_flush redis_script_kill redis_script_load redis_sdiff redis_sdiffstore redis_select redis_set redis_setbit redis_setrange redis_shutdown redis_shutdown_nosave redis_shutdown_save redis_sinter redis_sinterstore redis_sismember redis_slowlog_get redis_slowlog_get_count redis_slowlog_len redis_slowlog_reset redis_smembers redis_smove redis_sort redis_sortstore redis_spop redis_spop_count redis_srandmember redis_srandmember_count redis_srem redis_sscan redis_strlen redis_sunion redis_sunionstore redis_time redis_touch redis_ttl redis_type redis_unwatch redis_watch redis_zadd redis_zcount redis_zincrby redis_zinterstore redis_zlexcount redis_zrange redis_zrangebylex redis_zrangebyscore redis_zrank redis_zrem redis_zremrangebylex redis_zremrangebyrank redis_zremrangebyscore redis_zrevrange redis_zrevrangebylex redis_zrevrangebyscore redis_zrevrank redis_zscan redis_zscore redis_zunionstore

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View documentation on redis.io: redis_zcard(...)
Syntax 
redis_zcard( conn_id, key )
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