gmp_setbit

    (PHP 4 >= 4.0.4, PHP 5, PHP 7, PHP 8)

    gmp_setbit — Imposta bit

    Descrizione

    gmp_setbit(resource $&a, int $index, bool $set_clear = ?): resource

    Sets bit index in a. set_clear definisce se il bit è settato su 0 o su 1. Di default il bit è settato a 1.

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    User Contributed Notes 1 note

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    bluej100@gmail
    17 years ago
    The third parameter is somewhat confusingly named; it would probably be better described as "$set_state". If true, it sets the bit to 1. If false, it sets the bit to 0. Default is true.

    <?php
    $num     = gmp_init(1);
    gmp_setbit($num, 1);
    echo     'gmp_setbit(1, 1): '.gmp_strval($num, 2)."\n"; // 11

    $num = gmp_init(1);
    gmp_setbit($num, 1, true);
    echo     'gmp_setbit(1, 1, true): '.gmp_strval($num, 2)."\n"; // 11

    $num = gmp_init(1);
    gmp_setbit($num, 0, false);
    echo     'gmp_setbit(1, 0, false): '.gmp_strval($num, 2)."\n"; // 0
    ?>
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