Php implements QR code scanning to access different download addresses based on browser types

The function implemented by this program is to scan the same QR code to access different types of browsers, which is very practical. we suggest you learn

<? Php $ Agent = $ _ SERVER ['http _ USER_AGENT ']; preg_match ('/android | iphone/I ', $ Agent, $ matches ); if (strtolower ($ matches [0]) = 'Android') {// echo "android"; header ("Location :". $ GLOBALS ["public_appconfig"] ["app"] ['Android']. "'");} elseif (strtolower ($ matches [0]) = 'iPhone') {header ("'Location :". $ GLOBALS ["public_appconfig"] ["app"] ['iOS ']. "'");} else {// you are not sure about the system or pcheader ("Location :". $ GLOBALS ["public_appconfig" ] ["App"] ['Android']. "'") ;}?>