want to protect excell by password in php code

[afsnau]

Hi,
I am generating excel file(.xls) by PHP code , but now my requirement is that to protect this excel by password .
I want to protect some column by password, by this no one able to edit some specific column without password eg. where we perform some calculation (formula) .

Plz reply
Thanks

[ua549]

I'm not aware of a key sequence to protect specific cells, rows or columns.
AFAIK that function is restricted to the format cells GUI dialog.