Inserting and retrieveing special characters in Mysql using php

[Ravigandha]

Hello everybody,
My question is how to insert special characters and symbols in Mysql5 database and how to retrieve them from database in php.
Here i am inserting some data from a form,by post method like
[PHP]$data=$_post[''field name"];[/PHP]
after this i am inserting in database,
[PHP]mysql_query("in sert into tbl_name(column name) values('$data') ");[/PHP]
Everthing working fine when we insert simple text in the form,but failing when special character are entered. eg: "",&,("some text").
And onemore thing i want to insert some mathematical equations or chemical equations into database how?

[ronverdonk]

Have you used the[php]mysql_escape_st ring()[/php] command on the $data variable before inserting?

Ronald

[Markus]

Have you used the[php]mysql_escape_st ring()[/php] command on the $data variable before inserting?

Ronald

[php]
mysql_escape_st ring()
[/php]
Is deprecated. Instead use
[php]
mysql_real_esca pe_sting()
[/php]