/**
 * Generates a regular expression that matches a standard IPv4 address.
 * The pattern ensures the string contains exactly four octets ranging from 0 to 255, separated by periods.
 * @returns {RegExp}
 */
export declare function ipv4Regex(): RegExp;
/**
 * Validates whether a given input string is a correctly formatted IPv4 address.
 * It checks the string against the IPv4 regular expression pattern and returns a boolean result.
 * @param {string} s - The input string to be validated.
 * @param {RegExp} [regex] - The regex used to execute the function.
 * @returns {boolean} - True if the string is a valid IPv4 address, false otherwise.
 */
export declare function isValidIPv4(s: string, regex?: RegExp): boolean;
/**
 * Creates a global regular expression used to locate IPv4 addresses within a larger block of text.
 * It utilizes word boundaries to ensure that only complete IP addresses are matched.
 * @returns {RegExp}
 */
export declare function findIPv4Regex(): RegExp;
/**
 * Scans the provided text and extracts all occurrences of IPv4 addresses.
 * This function uses a global regular expression to find multiple matches within the input.
 * @param {string} text - The input text content to be searched.
 * @param {RegExp} [regex] - The regex used to execute the function.
 * @returns {string[]} - An array of all matched IP addresses, or null if no matches are found.
 */
export declare function extractIPsV4(text: string, regex?: RegExp): string[];
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