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.

Recommended tutorial: PHP video tutorial

The above is the detailed content of What are the characteristics of PHP arrays?. For more information, please follow other related articles on the PHP Chinese website!