PHP 8.1.0 Beta 1 available for testing

gmp_testbit

(PHP 5 >= 5.3.0, PHP 7, PHP 8)

gmp_testbitTests if a bit is set

Açıklama

gmp_testbit(GMP|int|string $num, int $index): bool

Tests if the specified bit is set.

Değiştirgeler

num

Bir GMP nesnesi, bir tamsayı veya sayısal bir dizge.

index

The bit to test

Dönen Değerler

Returns true if the bit is set in $num, otherwise false.

Hatalar/İstisnalar

An E_WARNING level error is issued when index is less than zero, and false is returned.

Örnekler

Örnek 1 gmp_testbit() example

<?php
$n 
gmp_init("1000000");
var_dump(gmp_testbit($n1));
gmp_setbit($n1);
var_dump(gmp_testbit($n1));
?>

Yukarıdaki örneğin çıktısı:

bool(false)
bool(true)

Ayrıca Bakınız

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User Contributed Notes 1 note

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bluej100@gmail
14 years ago
gmp_testbit will be very useful for my (over 64-bit) bitmask checking.

In the meantime, I think these are the best replacements.

Mostly full:

<?php
(gmp_scan1($a, $index) == $index)
?>

Mostly empty:

<?php
(gmp_scan0($a, $index) != $index)
?>

Still worst-case O(N), though.
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