PHP使用array_unique对数组去重

$aa = array("apple", "banana", "pear", "apple", "wail", "watermalon");
 
$bb = array_unique($aa);
 
print_r($bb);
 
　　结果如下：


Array ( [0] => apple [1] => banana [2] => pear [4] => wail [5] => watermalon )

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