Generally speaking I don't write other people's programs for them unless they pay me.
You're probably being given different answers because there are so many ways of doing what you describe, and some details depend on your precise configuration.
submit.php----------------------
$primarykey=$POST['primarykey'];
$client=$POST['client'];
$livedate=$_POST['livedate'];
$host= // You'll have
$username= // to fill
$password= // these out.
$dbconn=ibase_connect($host,$username,$password);
$query="INSERT INTO [table] (PRIMARYKEY, CLIENT, LIVEDATE) values ($primarykey,'$client','$livedate')";
$succeed=ibase_query($dbconn,$query);
if($succeed)
{ echo "Insertion succeeded.";
}
else
{ echo "Insertion failed.";
}
Now, I don't have an Interbase DBMS, and never used one in the past, so I don't know what the date format is. I also don't know certain things about your configuration. As a result there is no checking in the above snippet to make sure that the data supplied is of the right type and format, or whether the result is even consistent (usually the primary key is generated by the DBMS, not supplied by the user - but it has to be unique throughout the table.); so I'll have to leave that and the question of whether you need to do $client=str_replace("'","''",$client) before putting it in the query to you to figure out.