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(PHP 4 >= 4.0.4, PHP 5, PHP 7)
gmp_clrbit — Clear bit
$a
, int $index
)
Clears (sets to 0) bit index
in
a
. The index starts at 0.
a
可以是一个 GMP 数据 resouce ,或一个可以转换为数值的字符串。
index
The index of the bit to clear. Index 0 represents the least significant bit.
GMP 数值 资源 .
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" ;
?>
以上例程会输出:
254
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.