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    gmp_scan1

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

    gmp_scan1 — Scan for 1

    Descrição

    gmp_scan1(GMP|int|string $num1, int $start): int

    Scans num1, starting with bit start, towards more significant bits, until the first set bit is found.

    Parâmetros

    num1

    The number to scan.

    Um objeto GMP, um int ou uma string numérica.

    start

    The starting bit.

    Valor Retornado

    Returns the index of the found bit, as an int. If no set bit is found, -1 is returned.

    Exemplos

    Exemplo #1 gmp_scan1() example

    <?php
    // "1" bit is found at position 3. index starts at 0
    $s1 = gmp_init("01000", 2);
    echo     gmp_scan1($s1, 0) . "\n";

    // "1" bit is found at position 9. index starts at 5
    $s2 = gmp_init("01000001111", 2);
    echo     gmp_scan1($s2, 5) . "\n";
    ?>

    O exemplo acima produzirá:

    3
9

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