How to convert numbers into array in php

In programming, sometimes we need to convert a number into an array form. At this time, we can use PHP's own function to achieve this. This article will introduce several commonly used methods.

1. Use the str_split function

The str_split function can split a string into several elements according to the specified length and return an array. If we want to convert a number into an array, we can first use the intval function to convert it into a string form, and then use the str_split function to split it.

Sample code:

$num = 123456;
$str = (string)$num;
$arr = str_split($str);
print_r($arr);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

2. Use the preg_split function

The preg_split function can split a string according to the specified regular expression. and returns an array. If we want to convert a number into an array, we can convert it into string form and then use the preg_split function to split it.

Sample code:

$num = 123456;
$str = (string)$num;
$arr = preg_split('//', $str, -1, PREG_SPLIT_NO_EMPTY);
print_r($arr);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

3. Use str_split and array_map functions

Use str_split function to convert numbers into string form Finally, use the array_map function to convert each element into an integer, and you will get an array composed of numbers.

Sample code:

$num = 123456;
$str = (string)$num;
$arr = array_map('intval', str_split($str));
print_r($arr);

Output result:

Array
(
    [0] => 1
    [1] => 2
    [2] => 3
    [3] => 4
    [4] => 5
    [5] => 6
)

Summary:

In PHP, you can use the str_split and preg_split functions to convert numbers into arrays. You can also use the array_map function to perform integer conversion, and just choose the method that suits you.

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