PHP Add Key-Value Pair to Array

There are two ways to add new key-value pairs to an array.

1. Assign values to an array using array assignment syntax.

$array = array(
    'key1' => 'value1',
    'key2' => 'value2'
);

// 添加新的键值对
$array['key3'] = 'value3';

1. Using the array function array_push():

$array = array(
    'key1' => 'value1',
    'key2' => 'value2'
);

// 使用array_push()函数添加新的值
array_push($array, 'key3', 'value3');

You can add new key-value pairs to the array using any method.