I have done DEDECMS for help! Thank you! -Php Tutorial

I have done DEDECMS for help! Urgent! Thank you !! {Dede: php} session_start (); {dede: php} & lt ;! DOCTYPEhtmlPUBLIC & quot;-W3CDTDXHTML1.0TransitionalEN & quot; www. w3.orgTRxhtml1DTDxht has done dede cms for help! Urgent! Thank you !!
{Dede: php} session_start (); {/dede: php}





{Dede: php}


Function all ($ v)
{

Exit ($ _ SESSION [cfcs]);

$ Res = '';
If (empty ($ _ SESSION [$ v])
$ Res = 'class = "all "';

Return $ res;

}

Function on ($ v, $ n)
{
$ Res = '';
If ($ _ SESSION [$ v] = $ n)
$ Res = 'class = "all "';
Return $ res;
}


{/Dede: php}



I wrote this in the template file, but I found that after a refresh, the session value is gone. this session is written in index. php.

------ Solution --------------------
Dizzy, give it to me.