Explode each delimited string in a 2d array to form a multidimensional array with as many as 3 levels

Question

I have a 2 level deep array like this:

Array(5) { 
[0]=> array(5) { 

    [0]=> string(0) "" 
    [1]=> string(21) "0,245.19000000,864432"
    [2]=> string(21) "1,245.26000000,864432" 
    [3]=> string(21) "2,245.49000000,864432" 
    [4]=> string(21) "4,245.33000000,864432" 
}

[1]=> array(5) { 
    [0]=> string(0) "" 
    [1]=> string(21) "0,245.19000000,864453" 
    [2]=> string(21) "1,245.26000000,864453" 
    [3]=> string(21) "2,245.49000000,864453" 
    [4]=> string(21) "4,245.33000000,864453" 
 }
}...

I want to explode the inner string by commas ("2,245.49000000,864453") so the arrays becomes at most 3 levels deep like so:

Array(5) { 
  [0]=> array(5) { 

    [0]=> string(0) "" 

    [1]=> array (3)
              [0]=> "0"
              [1]=> "245.19000000"
              [2]=> "864432"

    [2]=> array (3)
              [0]=> "1"
              [1]=> "245.26000000"
              [2]=> "864432"

    [3]=> array (3)
              [0]=> "3"
              [1]=> "245.49000000"
              [2]=> "864432"

    [4]=> array (3)
              [0]=> "4"
              [1]=> "245.3000000"
              [2]=> "864432"

    [4]=> array (3)
              [0]=> "5"
              [1]=> "245.3300000"
              [2]=> "864432"
 }
}
...

So far I have:

$done = array();

for ($i = 0; $i<=count($chunks); $i++) { //loops to get size of each 2d array
$r = count($chunks[$i]);

        for ($c = 0; $c<=count($chunks[$r]); $c++) { //loops through 3d array

        $arrayparts = $chunks[$i][$c];
        $done[] = explode(",", $arrayparts); //$arrayparts is 3d array string that is exploded each time through loop

    }

}

I think this code should work but when I var_dump nothing prints.

So did my coded worked now or why do you post my answer in your question? — Rizier123
– Rizier123, Commented Apr 1, 2015 at 22:51

Rizier123 · Accepted Answer · 2015-04-01 22:24:03Z

0

Don't make it complicated, just use this:

(Here I go through each innerArray with a foreach loop and then I go through all values with array_map() and explode it and return it to the results array)

<?php

    foreach($arr as $innerArray) {
        $result[] = array_map(function($v){
            return explode(",", $v);
        }, $innerArray);
    }

    print_r($result);

?>

answered Apr 1, 2015 at 22:24

Rizier123

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4 Comments

John Down Over a year ago

I don't quite understand the $innerArray vs $arr

Rizier123 Over a year ago

@SeanM With the foreach loop I loop over all: [0]=> array(5) { [0]=> string(0) ""... of these arrays and then I explode all values of the array with array_map() in the loop and return it to the results array

John Down Over a year ago

Ok. I still doesn't want to work. I'm using the array named 3d array $chunks. See edit

John Down Over a year ago

My arrays are set up wrong but this should work. Thanks!

AbraCadaver · Accepted Answer · 2015-04-01 22:45:47Z

0

This uses array_map() two times. Maybe a better way but I'm on beer three:

$result = array_map(function($v){
                        return array_map(function($v){ return explode(',', $v); }, $v);
                    }, $array);

answered Apr 1, 2015 at 22:45

AbraCadaver

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Comments

mickmackusa · Accepted Answer · 2025-01-21 01:07:38Z

0

To ensure that empty strings are not converted to subarrays AND to convert the parsed values into integer and float values, you can enjoy sscanf() to parse each string. Demo

var_export(
    array_map(
        fn($row) => array_map(
            fn($string) => sscanf($string, '%d,%f,%d') ?: '',
            $row
        ),
        $array
    )
);

answered Jan 21 at 1:07

mickmackusa♦

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