Question

RandomCompat_substr( string $binary_string,  int $start,  int $length = null )

substr() implementation that isn’t brittle to mbstring.func_overload

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description

This version just uses the default substr()

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参数

$binary_string

(string) (Required)

$start

(int) (Required)

$length

(int) (Optional) (optional)

Default value: null

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返回值

(string)

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源代码

File: wp-includes/random_compat/byte_safe_strings.php

        function RandomCompat_substr($binary_string, $start, $length = null)
        {
            if (!is_string($binary_string)) {
                throw new TypeError(
                    'RandomCompat_substr(): First argument should be a string'
                );
            }

            if (!is_int($start)) {
                throw new TypeError(
                    'RandomCompat_substr(): Second argument should be an integer'
                );
            }

            if ($length !== null) {
                if (!is_int($length)) {
                    throw new TypeError(
                        'RandomCompat_substr(): Third argument should be an integer, or omitted'
                    );
                }

                return substr($binary_string, $start, $length);
            }

            return substr($binary_string, $start);
        }

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相关函数

Uses

• wp-includes/random_compat/byte_safe_strings.php: RandomCompat_strlen()

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Used By

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

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User Contributed Notes