MessageBox using a php function

[nst]

Hello,

is there any php function to create a MessageBox like the following javascript function does?

if(confirm('Are you sure you want to delete tihs record?')) {
document.write('OK');
}
else {
document.write('NOOO!');
}

Of course I want that the value of the click will be returned into a php $variable.

Thanks in advance.