Detect mobile browser for android and iphone..
Want to Use below code as in wordpress post
if(strstr($_SERVER['HTTP_USER_AGENT'],'Android')){
echo '<img src="/images/android.png">';
}
else if(strstr($_SERVER['HTTP_USER_AGENT'],'iPhone'))
{
echo '<img src="/images/iphone.png">';
}
else {
echo '<img src="/images/Download-now-button.png">';
}