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    gmp_pow

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

    gmp_pow — Raise number into power

    说明

    gmp_pow(GMP|int|string $num, int $exponent): GMP

    Raise num into power exponent.

    参数

    num

    The base number.

    GMP 对象或 int ，或数字string。

    exponent

    The positive power to raise the num.

    返回值

    The new (raised) number, as a GMP number. The case of 0^0 yields 1.

    范例

    示例 #1 gmp_pow() example

    <?php
    $pow1     = gmp_pow("2", 31);
    echo     gmp_strval($pow1) . "\n";
    $pow2 = gmp_pow("0", 0);
    echo     gmp_strval($pow2) . "\n";
    $pow3 = gmp_pow("2", -1); // Negative exp, generates warning
    echo gmp_strval($pow3) . "\n";
    ?>

    以上例程会输出：

    2147483648
1

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