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                            ## ttl, pttl


##### *Description*

Returns the time to live left for a given key, in seconds. If the key doesn't exist, `<span class="calibre12">FALSE</span>` is returned. pttl returns a time in milliseconds.

取得一個KEY已經存在的時間。如果這個KEY不存在，則返回FLASE。PTTL使用毫秒為單位。

##### *Parameters*

*Key*: key

##### *Return value*

Long, the time left to live in seconds.

##### *Example*

```
<pre class="calibre9">$redis->ttl('key');
```
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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