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                # PHP dechex() 函數 ## 定義和用法 dechex() 函數把十進制轉換為十六進制。 ### 語法 ``` dechex(dec_number) ``` | 參數 | 描述 | | --- | --- | | dec_number | 必需。規定要轉換的十進制數。 | ### 說明 返回一個字符串,包含有給定 _binary_string_ 參數的十六進制表示。所能轉換的最大數值為十進制的 4294967295,其結果為 "ffffffff"。 ## 例子 ``` <?php echo dechex("30"); echo dechex("10"); echo dechex("1587"); echo dechex("70"); ?> ``` 輸出: ``` 1e a 633 46 ```
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