PHP + MS SQL Server character coding

First, please check if you can type that character since some tool, different of your application, for example SQL Server Management Studio, then save it in the table and create an stored procedure with a variable, for example, that saves, that character, in both cases if you can see the character correctly, please follow the next steps:

• Put some identifier for the special characters to replace the special character since your application, for example, if you need to save that "o" with double acute, replace for "_1" (think a better idea :P for the identifier).
• Write a stored procedure to replace that "_1" again for that "o" with double acute but, since SQL Server, you write the character directly in the code of the stored procedure.

Is a little dirty work around and depends if you can type that character directly to SQL Server. I have had that problems before, and I don't remember exactly the final solution, but I remember this trick that let me continue working to find the final solution.

Plus: Did you check the type of the column that stores the character?, whatever, start trying that requested at the beginning.