Why does my php form keep yielding empty rows in mysql? -

so trying create form puts data in table, , got work, when goes table, creates empty rows. here code, please me out.

form.php

<form action="tableinsert.php" method="post">     first name:<input type="text" name="fname"> <br/>     last name:<input type="text" name="lname"><br/>     username:<input type="text" name="uname"><br/>     password:<input type="text" name="password"><br/>     email:<input type="text" name="email"><br/> </form> 

tableinsert.php

<?php $sc = mysqli_connect ("localhost" , "dbname" , "password");  if (mysqli_errno($sc)) {     echo "sorry, couldn't connect database. if keep getting error, please email webmaster @ natashaharrell@hotmail.com " . mysql_error; }  $si = "insert sdb_users (fname, lname, uname, password, email) values ('$_post[fname]' , '$_post[lname]' , '$_post[uname]' , '$_post[password]' , '$_post[email]' )";  if (!mysqli_query($sc, $si)) {     echo "sorry there seems problem: " . mysqli_errno($sc) ; }  else {     echo "1 record added."; }      mysqli_close($sc);  ?> 

try that

$si = "insert sdb_users (fname, lname, uname, password, email) values ('".$_post["fname"]."' , '".$_post["lname"]."' , '".$_post["uname"]."' , '".$_post["password"]."' , '".$_post["email"]."' )";