How to convert numeric string to numeric array in php

PHP is a powerful programming language that can be used for various types of web development. In PHP, you can convert a numeric string into a numeric array for use. A numeric string refers to a string of numbers, such as "12345", while a numeric array refers to a list of numbers.

In this article, we will discuss how to convert numeric string to numeric array in PHP.

1. Use the explode() function

The explode() function is a PHP function that splits a string into an array at a certain delimiter. When using this function to split a string into an array, the string is split into segments at the delimiter. Each segment is thereby stored in the corresponding cell of the array. Therefore, you can use the explode() function to convert a numeric string into a numeric array.

The following is a sample code that uses the explode() function to convert a numeric string to a numeric array:

$num_str = "1,2,3,4,5";
$num_array = explode(",", $num_str);
print_r($num_array);

The output is as follows:

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

2. Use str_split() Function

str_split() function is another string function in the PHP function library, which can split a string into an array of small strings. When using this function to divide a string into an array, the string is divided into small strings of corresponding length according to the length specified by the parameter. Therefore, you can use this function to split the numeric string into small strings of length 1, and then convert the numeric string to a numeric value to process the numeric string.

The following is a sample code that uses the str_split() function to convert a numeric string to a numeric array:

$num_str = "12345";
$num_array = array_map('intval', str_split($num_str, 1));
print_r($num_array);

The output is as follows:

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

3. Use str_split() function and the array_map() function

Use the array_map() function to convert each string in the numeric string array returned by the str_split() function to a number. This is useful for converting numeric strings to Numeric arrays are very useful.

The following is a sample code that uses the str_split() function and array_map() function to convert a numerical string into a numerical array:

$num_str = "12345";
$num_array = array_map('intval', str_split($num_str));
print_r($num_array);

The output results are as follows:

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

In summary As mentioned, in PHP you can use the explode() function, str_split() function and array_map() function to convert a numeric string into a numeric array. Which method to use depends on your coding needs and personal preference. Using these methods, it will be easier to convert numeric strings into numeric arrays in future PHP programming work.

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