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                # PHP array_shift() 函數 ## 定義和用法 array_shift() 函數刪除數組中的第一個元素,并返回被刪除元素的值。 注釋:如果鍵是數字的,所有元素都將獲得新的鍵,從 0 開始,并以 1 遞增。(參見例子 2)。 ### 語法 ``` array_shift(array) ``` | 參數 | 描述 | | --- | --- | | array | 必需。規定輸入的數組。 | ## 例子 1 ``` <?php $a=array("a"=>"Dog","b"=>"Cat","c"=>"Horse"); echo array_shift($a); print_r ($a); ?> ``` 輸出: ``` Dog Array ( [b] => Cat [c] => Horse ) ``` ## 例子 2 帶有數字鍵: ``` <?php $a=array(0=>"Dog",1=>"Cat",2=>"Horse"); echo array_shift($a); print_r ($a); ?> ``` 輸出: ``` Dog Array ( [0] => Cat [1] => Horse ) ```
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