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PHP | gethostbyname() Function

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  • Last Updated : 29 Aug, 2019
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The gethostbyname() function is an inbuilt function in PHP which returns IPv4 address for a specified host/domain name.


string gethostbyname( $hostname )

Parameter: This function accepts single parameter $hostname which is required. It specifies the hostname whose IPv4 address to be found.

Return Value: This function returns the IPv4 address on success or string containing the unmodified hostname on failure.

Note: This function is available for PHP 4.0.0 and newer versions.

Below program illustrates the gethostbyname() function in PHP:


$ip = gethostbyname("");
echo $ip;



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