How to convert two-dimensional array to one-dimensional array in PHP

This article mainly shares with you the method of converting PHP two-dimensional array into one-dimensional array. It is mainly shared with you in the form of code. I hope it can help you.

$arr = [
    'a' => [
        1,
        2,
    ],
    'b' => [
        '3',
        '4'=>[
            '5'
        ]
    ],
    'b'
];

print_r(iterator_to_array(
        new RecursiveIteratorIterator(
            new RecursiveArrayIterator($arr)
        ),
        false
    )
);

Result:

Array ([0] => 1 [1] => 2 [2] => 3 [3] => 5 [4 ] => b )

Related recommendations:

php Convert a two-dimensional array into an array with a parent-child relationship_PHP tutorial

The above is the detailed content of How to convert two-dimensional array to one-dimensional array in PHP. For more information, please follow other related articles on the PHP Chinese website!