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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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