gethostbyaddr

Function • Params and return types changed in PHP 8.0

Get the Internet host name corresponding to a given IP address.

PHP 5
PHP 7
PHP 8.0
Improved
PHP 8.1
PHP 8.2-8.3
PHP 8.4
PHP 8.5
PHP 8.6

gethostbyaddr Function synopsis

gethostbyaddr(string $ip): string|false

Parameters

$ip

Typestring

The host IP address.

Return value

Typestring|false

Returns the host name on success, the unmodified $ip on failure, or false on malformed input.

Changes to the gethostbyaddr Function

PHP 8.0

  • Return type added: string|false
  • Parameter name of parameter #1 changed: $ip_address to $ip
  • Parameter type added for parameter #1 ($ip): string
- gethostbyaddr($ip_address)
+ gethostbyaddr(string $ip): string|false

gethostbyaddr Function Availability

PHP VersionAvailability
PHP 8.6Upcoming Release Yes
PHP 8.5Supported (Latest) Yes
PHP 8.4Supported Yes
PHP 8.3Security-Fixes Only Yes
PHP 8.2Security-Fixes Only Yes
PHP 8.1Unsupported Yes
PHP 8.0Unsupported Yes
PHP 7.4Unsupported Yes
PHP 7.3Unsupported Yes
PHP 7.2Unsupported Yes
PHP 7.1Unsupported Yes
PHP 7.0Unsupported Yes
PHP 5.6Unsupported Yes
PHP 5.5Unsupported Yes
PHP 5.4Unsupported Yes
PHP 5.3Unsupported Yes