PHP if else with database -

i'm having trouble php file. i've done connection database can check it.

i've got if-else statement in case return of database wanted. thing everytime reload url, echo in else statement, instead of nothing. dont want if-else execute until submit html form i've got.

here simple example:

if($somethingtocheck){    echo 'hey!'; }else{ echo 'bad!'; } 

the var $somethingtocheck declared , know right.

so explained, if reload url, string bad! in screen, if have not submited form.

there's way not execute if-else statement until submit html form?

edit: more details problem.

you should enclose in block runned when answering post:

if ($_server['request_method'] === 'post') {     if($somethingtocheck){        echo 'hey!';     }else{ echo 'bad!'; } }