对数组按照键名逆向排序的函数是( )?
A. bool arsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
B. bool sort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
C. bool rsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
D. bool krsort ( array &$array [, int $sort_flags = SORT_REGULAR ] )
将数组打乱的函数是( )?
A. bool shuffle ( array &$array )
B. array shuffle ( array &$array )
C. bool reverse ( array &$array )
D. arrayreverse ( array &$array )
合并一个或多个数组的函数是( )?
A. array array_join( array $array1 [, array $... ] )
B. array str_merge ( array $array1 [, array $... ] )
C. array array_merge ( array $array1 [, array $... ] )
D. array merge ( array $array1 [, array $... ] )
从数组中随机取出一个或多个单元的函数是( )?
A. mixed round ( array $input [, int $num_req = 1 ] )
B. mixed array_round ( array $input [, int $num_req = 1 ] )
C. mixed rand ( array $input [, int $num_req = 1 ] )
D. mixed array_rand ( array $input [, int $num_req = 1 ] )