How to convert a number into an element in an array in php

In PHP, sometimes you need to convert a number into an element in an array. This can be achieved through some built-in PHP functions such as str_split(), explode() and preg_split().

Use the str_split()

str_split() function to split the string into a character array. Because numbers can also be viewed as strings, you can use this function to convert a number into an array.

$num = 12345;
$arr = str_split($num);
print_r($arr);

The output will be:

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

Use the explode()

explode() function to expand the string as specified separator and store the result in an array.

$num = "1,2,3,4,5";
$arr = explode(",", $num);
print_r($arr);

The output will be:

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

Use preg_split()

##preg_split() function with explode( ) function is similar, but regular expressions can be used for segmentation.

$num = "1+2-3*4/5";
$arr = preg_split("/[-+\/*]/", $num);
print_r($arr);

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

/[- \/*]/ to specify the delimiter. This regular expression will match a set of possible delimiters: -, , *, and /.

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