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                            ## hKeys


##### *Description*

Returns the keys in a hash, as an array of strings.

取得HASH表中的KEYS，以數組形式返回。

##### *Parameters*

*Key*: key

##### *Return value*

An array of elements, the keys of the hash. This works like PHP's array\_keys().

##### *Example*

```
<pre class="calibre16">$redis->delete('h');
$redis->hSet('h', 'a', 'x');
$redis->hSet('h', 'b', 'y');
$redis->hSet('h', 'c', 'z');
$redis->hSet('h', 'd', 't');
var_dump($redis->hKeys('h'));
```

Output:

```
<pre class="calibre16">array(4) {
  [0]=>
  string(1) "a"
  [1]=>
  string(1) "b"
  [2]=>
  string(1) "c"
  [3]=>
  string(1) "d"
}
```

The order is random and corresponds to redis' own internal representation of the set structure.

##
                    
                
        
                
            
        
                
    
                
    
                
        
                
    
                

                







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