gmp_clrbit
(PHP 4 >= 4.0.4, PHP 5)
gmp_clrbit — Clear bit
說明
Clears (sets to 0) bit index in
a. The index starts at 0.
參數
-
a -
可以是一個 GMP 數據 resouce，或一個可以轉換為數值的字串。
-
index -
The index of the bit to clear. Index 0 represents the least significant bit.
回傳值
GMP 數值資源.
範例
Example #1 gmp_clrbit() example
<?php
$a = gmp_init("0xff");
gmp_clrbit($a, 0); // index starts at 0, least significant bit
echo gmp_strval($a) . "\n";
?>
上例將輸出：
254
註釋
Note:
Unlike most of the other GMP functions, gmp_clrbit() must be called with a GMP resource that already exists (using gmp_init() for example). One will not be automatically created.
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