1) Check Page type using is_page() function
if(is_page()) {
echo "This is a PAGE.";
}
2) Check Page using get_post_type() function
if(get_post_type() === 'page') {
echo "This is a PAGE.";
}
3) Check Page using post() function
if(get_post()->post_type === 'page') {
echo "This is a PAGE.";
}
4) Check Post type using is_single() function
if(is_single()) {
echo "This is a POST.";
}
5) Check Post type using get_post_type() function
if(get_post_type() === 'post') {
echo "This is a POST.";
}
6) Check Post type using get_post() function
if(get_post()->post_type === 'post') {
echo "This is a POST.";
}