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                # PHP array_flip() 函數 ## 定義和用法 array_flip() 函數返回一個反轉后的數組,如果同一值出現了多次,則最后一個鍵名將作為它的值,所有其他的鍵名都將丟失。 如果原數組中的值的數據類型不是字符串或整數,函數將報錯。 ### 語法 ``` array_flip(array) ``` | 參數 | 描述 | | --- | --- | | array | 必需。規定輸入的數組。 | ## 例子 ``` <?php $a=array(0=>"Dog",1=>"Cat",2=>"Horse");print_r(array_flip($a)); ?> ``` 輸出: ``` Array ( [Dog] => 0 [Cat] => 1 [Horse] => 2 ) ```
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