shm_remove_var
    (PHP 3>= 3.0.6, PHP 4 , PHP 5)
shm_remove_var -- Removes a variable from shared memory
    
Description
int 
shm_remove_var ( int shm_identifier, int variable_key )
     Removes a variable with a given variable_key
     and frees the occupied memory.
    
     See also shm_remove().