Arrays in php can be indexed, similar to dictionaries in other languages, you can press the index to get the value. When a digital index is specified, the keys of the subsequent unspecified index will be sequentially incremented on this basis
PHP supports nested lists
You can add, update, and delete the array. Multi-dimensional array values are consistent with python
The count function can calculate the length of the array and is used with a for loop.
You can also use iterators to get values on an array. The list function can unpack the array, each function is equivalent to the next function in python ()
