（php，mysqli，phpmyadmin）我可以用这种方式将记录插入到我的表中吗？

I cant find the mistake but this code doesn't work. It always shows me an "error de envio" (sending error) on this part:

...or die("error de envio");

phpMyAdmin data:

My PHP code:

$link =mysqli_connect("localhost","my_user","my_password","usuario")or die("
<h2>NO se encuentra el servidor </h2>");

$name=$_POST['name'];
$pass=$_POST['pass'];
$nick=$_POST['nick'];
$email=$_POST['correo'];
$raza=$_POST['raza'];

$req =(strlen($nick)*strlen($pass)*strlen($email))or die("<h2>no se llenaron los datos </h2>");

$contra=md5($pass);

mysqli_query($link,"SELECT * FROM usuario");
mysqli_query($link,"INSERT INTO `usuario`(`nombre`,`contrasena`,`usuario`,`email`,`raza`) VALUES('$name','$contra','$nick','$email','$raza')") or die("error de envio");
echo"gracias por registrarse" 
mysqli_close($link);

Can I enter my data this way?

You have usuar column in table not usuario that use in query.

mysqli_query($link,"INSERT INTO `usuario`(`nombre`,`contrasena`,`usuar`,`email`,`raza`) VALUES('$name','$contra','$nick','$email','$raza')") or die("error de envio");

Note: You can see mysql error with mysqli_error function.

mysqli_query($link,"INSERT INTO `usuario`(`nombre`,`contrasena`,`usuario`,`email`,`raza`) VALUES('$name','$contra','$nick','$email','$raza')") or die(mysqli_error($link));