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PHP Manual [inet_ntop]

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PHP Manual || Network Functions

(PHP 5 >= 5.1.0, PHP 7)

inet_ntopConverts a packed internet address to a human readable representation


inet_ntop ( string $in_addr ) : string

This function converts a 32bit IPv4, or 128bit IPv6 address (if PHP was built with IPv6 support enabled) into an address family appropriate string representation.



A 32bit IPv4, or 128bit IPv6 address.

Return Values

Returns a string representation of the address or FALSE on failure.


Example #1 inet_ntop() Example

chr(127) . chr(0) . chr(0) . chr(1);
$expanded inet_ntop($packed);

/* Outputs: */
echo $expanded;

$packed str_repeat(chr(0), 15) . chr(1);
$expanded inet_ntop($packed);

/* Outputs: ::1 */
echo $expanded;


Version Description
5.3.0 This function is now available on Windows platforms.

See Also

  • long2ip() - Converts an long integer address into a string in (IPv4) Internet standard dotted format
  • ip2long() - Converts a string containing an (IPv4) Internet Protocol dotted address into a long integer
  • inet_pton() - Converts a human readable IP address to its packed in_addr representation

PHP Manual || Network Functions