PHP namespace instance description

PHP namespace instance description. For more information, see.

PHP namespace instance description. For more information, see.

The Code is as follows:

Namespace bak \ ba;
Function bab (){
Echo "bi ";
}
Namespace kkk;
Function k1 (){
Echo "k1 ";
}
\ Bak \ ba \ bab (); // use another namespace in the kkk namespace. Pay attention to the previous \
Use \ bak \ ba as B; // It is still in the kkk namespace, but the following method is correct when using an alias
# Use bak \ ba as B; // do not use the \ ID
B \ bab (); // when the namespace under the alias is used, the \ ID should not exist before it
K1 (); // No error is returned when this function is called, indicating that use does not affect the current namespace