array problem

[graziano]

Hello

I have an array with of server ip with server name like this

$ips = array(
"12.12.12.12" => "server1",
"12.12.12.13" => "server2",
"12.12.12.14"=> "server3"
);

I am trying to write the code to check if a $newip exists on the $ips array
and if exists I wish to show the server name for that ip.
How to do that please ?

For example if $newip = 12.12.12.13 since it exists on $ips , the code should return "server2".

I am trying

<?
$ips = array(
"12.12.12.12" => "server1",
"12.12.12.13" => "server2",
"12.12.12.14"=> "server3"
);


$newip="12.12.12.13";
if (in_array($newip, $ips ))
{
echo "exists $ips[$newip]";
}
else
{
echo "not exists";
}

?>

but it does not work , I always receive "not exists";

Any help please ?
Thanks

[laserlight]

Your use of in_array() is on the right track, but here you want to search the keys, not the values, so you also need to use [man]array_keys/man.

[el_timm]

Or array_key_exists(). Something like:

$newip="12.12.12.13"; 
echo (array_key_exists($newip, $ips)) ? $ips[$newip] : 'not exists';