Question

RandomCompat_intval( int|float $number,  boolean $fail_open = false )

Cast to an integer if we can, safely.

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description

If you pass it a float in the range (~PHP_INT_MAX, PHP_INT_MAX) (non-inclusive), it will sanely cast it to an int. If you it’s equal to ~PHP_INT_MAX or PHP_INT_MAX, we let it fail as not an integer. Floats lose precision, so the <= and => operators might accidentally let a float through.

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参数

$number

(int|float) (Required) The number we want to convert to an int

$fail_open

(boolean) (Optional) Set to true to not throw an exception

Default value: false

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返回值

(int) (or float if $fail_open)

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源代码

File: wp-includes/random_compat/cast_to_int.php

    function RandomCompat_intval($number, $fail_open = false)
    {
        if (is_numeric($number)) {
            $number += 0;
        }

        if (
            is_float($number)
            &&
            $number > ~PHP_INT_MAX
            &&
            $number < PHP_INT_MAX
        ) {
            $number = (int) $number;
        }

        if (is_int($number) || $fail_open) {
            return $number;
        }

        throw new TypeError(
            'Expected an integer.'
        );
    }

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相关函数

Used By

• wp-includes/random_compat/random_int.php: random_int()
• wp-includes/random_compat/random_bytes_dev_urandom.php: random_bytes()

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User Contributed Notes