Determine whether the current letter is a micro-browser or client APP

/ ** 
* determine whether the current micro-channel browser or APP client 
* / 
function isWeixinEsz () 
{ 

    IF (the strpos ($ _ SERVER [ 'the HTTP_USER_AGENT'], 

            'MicroMessenger') == to false!) { 

        Return. 1; 
    } the else { 
        $ isApp = \ Think \ cookies :: GET ( 'isApp'); 
        IF ($ isApp) { 
            return 2; 
        } the else { 
            $ isApp = \ Think \ the Request :: instance () -> GET ( 'isAPP', to false ); 
            IF ($ isApp) { 
                \ Think \ cookies :: SET ( 'isApp',. 1); 
                return 2; 
            } the else { 
                return 0; 
            } 
        } 
    } 
    return 0; 
}