How Can I Convert a Comma-Delimited String to an Integer Array in PHP?

Convert a Comma-Delimited String into an Array of Integers

In PHP, when using the explode() function to convert a comma-delimited string into an array, the result is an array of strings. However, if you need the values to be integers instead, you can use the following methods:

Using array_map()

The array_map() function applies a callback function to every element of an array. In this case, you can use intval() to convert each string to an integer:

$string = "1,2,3";
$integerIDs = array_map('intval', explode(',', $string));

This will return the following array:

[0] => 1
[1] => 2
[2] => 3

Foreach Loop with Direct Conversion

You can also use a foreach loop and convert each value directly:

$string = "1,2,3";
$ids = explode(',', $string);

foreach ($ids as &$id) {
    $id = (int) $id;
}

This method is less efficient than using array_map() but is still a viable option.

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