How can I split a string like \'A,5|B,3|C,8\' into a multidimensional array in PHP without using loops?

Separating Strings into Multidimensional Arrays without Loops in PHP

When manipulating strings in PHP, it can be useful to divide them into smaller chunks or extract specific data. One common task is splitting a string into a multidimensional array, which can help organize and structure the information.

Question:

How do we split a string like "A,5|B,3|C,8" into a multidimensional array in PHP without using loops?

Solution:

Although the question suggests avoiding loops, splitting strings typically involves some form of iteration. However, we can leverage PHP's built-in functions to streamline the process.

Consider the following code:

<code class="php"><?php $str = "A,5|B,3|C,8";

$a = array_map(
    function ($substr) {
        return explode(',', $substr);
    },
    explode('|', $str)
);

var_dump($a);

?></code>

In this code, we use array_map and explode to achieve our goal without explicit loops. Here's how it works:

• explode('|', $str) splits the original string into an array of substrings, separating them at the pipe (|) delimiter.
• array_map then applies an anonymous function (fn) to each substring. The function uses explode(',', $substr) to further split the substring into an array by comma (,) delimiters.

This effectively creates a multidimensional array, where each subarray is the result of splitting the original substring by commas.

The resulting $a variable will contain an array that looks like this:

array
  0 => array
    0 => string 'A' (length=1)
    1 => string '5' (length=1)
  1 => array
    0 => string 'B' (length=1)
    1 => string '3' (length=1)
  2 => array
    0 => string 'C' (length=1)
    1 => string '8' (length=1)

This method allows us to separate strings into multidimensional arrays efficiently without writing manual loops.

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