问php语法报错第一行？

$sql = "CREATE TABLE use (

name VARCHAR(30) UNSIGNED AUTO_INCREMENT PRIMARY KEY,

PHONE VARCHAR(30) NOT NULL,

SCHOOL VARCHAR(30) NOT NULL,

)";

if ($conn->query($sql) == 1) {

echo "Table use created successfully";

}

else{

echo "创建数据表错误:".$conn->error;

}