About arrays in PHP and multidimensional arrays

Because it is a beginner, the one-dimensional and two-dimensional arrays in PHP can be understood, but then the three-dimensional array and multidimensional array, although it can be read, but let me write the words do not come out. Because I am the understanding of the array is not thorough enough, plus basically self-learning, has not been systematic learning and guidance. So this problem can only be recorded here, until later back to think about this aspect of the problem, but also hope that who will see the elder brother can give guidance, grateful.

About arrays in PHP and multidimensional arrays