What are the characteristics of PHP arrays?

PHP’s array is a very powerful and flexible data type. The following are some features of PHP arrays:

1. You can use numbers or strings as array key values

$arr = [1 => 'ok', 'one' => 'hello'];

2. You can read them in order Array

foreach($arr as $key => $value){ echo $arr[$key]; }

3. The elements in the array can be read randomly

$arr = [1 => 'ok', 'one' => 'hello', 'a' => 'world']; echo $arr['one']; echo current($arr);

4. The length of the array can be Change

$arr = [1, 2, 3]; $arr[] = 4; array_push($arr, 5);

Based on these characteristics, we can use arrays in PHP to easily implement various data structures such as collections, stacks, lists, and dictionaries.

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