PHPPOST: unable to read the downstream string

PHPPOST Upload, unable to read the uploaded string local c # write & nbsp; with WebClient class http://1.liuruitao.sinaapp.com/test.php? Name = {0} is uploaded through this url. & nbsp; if ($ _ SERVER ['request _ method'] = "POST") & nbs php post Upload, unable to read the uploaded string
Local c # write with WebClient class http://1.liuruitao.sinaapp.com/test.php? Name = {0} is uploaded through this url.

If ($ _ SERVER ['request _ method'] = "POST ")
{
// $ S = json_encode ($ _ post)

$ S = $ _ GET ["name"];
Echo "hello world !! ";
Echo $ _ POST ["name"];
$ Conn = mysql_connect (SAE_MYSQL_HOST_M. ':'. SAE_MYSQL_PORT, SAE_MYSQL_USER, SAE_MYSQL_PASS );
If (! $ Conn)
Die ("connect fail". mysql_error ());
Mysql_select_db ('app _ liuruitao', $ conn );
$ SQL = "insert into $ db values ('20140901', $ s, 3, '4', 5, '6', '7', '8 ', '9 ')";
Mysql_query ($ SQL, $ conn); // use an SQL statement to insert data.
Mysql_close (); // Close the MySQL connection
Echo "insert success ";
}
The strings in the uploaded name cannot be correctly obtained and inserted into the database. thank you for your help.

------ Solution --------------------
$ SQL = "insert into $ db values ('20140901', $ s, 3, '4', 5, '6', '7', '8 ', '9 ')";
If $ s has no value, the actual executed SQL command is
Insert into table name values ('20170101', 3, '4', 5, '6', '7', '8', '9 ')
It is obviously wrong.
Available
Mysql_query ($ SQL, $ conn) or die (mysql_error ());
Know if this situation exists
In addition
$ SQL = "insert into $ db values ('20140901', $ s, 3, '4', 5, '6', '7', '8 ', '9 ')";
Ying writing
$ SQL = "insert into $ db values ('20140901', '$ S', 3, '4', 5, '6', '7', '8 ', '9 ')";
Avoid unexpected events