How to break a PHP multidimensional array?

Question

Say I have this PHP array()

$tour_from array

Array
(
    [0] => Array
        (
            [0] => Dhaka
            [1] => noakhali
        )

    [1] => Array
        (
            [0] => Chittagong
            [1] => Sylhet
        )

)

I want to make like this:

Dhaka - Noakhali
Chittagong - Sylhet

How can I do this?

I used this but it's the wrong way:

foreach ($tour_from as $key => $value) {
    $chunk = array_chunk($value, 2);
    foreach ($chunk as $key1 => $value1) {
       echo $value1[$key][$key1] . ' - ' . $chunk[$key][$key1];
       echo '<br/>';
    }
 }

Charlie Schliesser · Accepted Answer · 2018-08-19 05:07:48Z

2

I think you're overcomplicating it a bit. Why not just loop over the outer array and implode the inner array?

<?php

$tour_from = [
    ['Dhaka', 'Noakhali'],
    ['Chittagong', 'Sylhet'],
];

foreach ($tour_from as $elem) {
    print implode(' - ', $elem);
    print '<br>';
}

answered Aug 19, 2018 at 5:07

Charlie Schliesser

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Comments

mickmackusa · Accepted Answer · 2018-08-19 06:31:37Z

2

There is no need for chunking or a second loop.

One loop containing implode() will do.

Code: (Demo)

$tour_from = [
    ['Dhaka', 'Noakhali'],
    ['Chittagong', 'Sylhet']
];

foreach ($tour_from as $row) {
    echo implode(' - ', $row), "\n";
}

Output:

Dhaka - Noakhali
Chittagong - Sylhet

Alternatively, if you like a functional one-liner: (Demo)

echo implode("<br>", array_map(function($row){ return implode(' - ', $row); }, $tour_from));

*The advantage to this is there is no trailing <br> on the final imploded string.

Or with fewer function calls, here is a version with array_reduce(): (Demo)

echo array_reduce($tour_from, function($carry, $row) {
    return $carry .= ($carry !== null ? "<br>\n" : '') . $row[0] . ' - ' . $row[1];
});

edited Aug 19, 2018 at 6:31

answered Aug 19, 2018 at 5:08

mickmackusa♦

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2 Comments

Charlie Schliesser Over a year ago

Bro you're in my head.

Charlie Schliesser Over a year ago

Yes, but I'd say it shouldn't. Well done seeing that and testing it out both ways. PHP functions... they always have little surprises.

ArtisticPhoenix · Accepted Answer · 2018-08-19 05:36:17Z

1

If you want to avoid using foreach you can do the same thing with array_walk and pass by reference &$var.

$array = [
    ["Dhaka", "noakhali"],
    ["Chittagong", "Sylhet"]
];

array_walk($array, function(&$item){
    $item = implode(' - ', $item);
});

print_r($array);

Output:

 Array
(
    [0] => Dhaka - noakhali
    [1] => Chittagong - Sylhet
)

Sandbox

If you want to output it instead of modify the array you can just echo it instead or do something like implode('<br>', $array) afterwords.

edited Aug 19, 2018 at 5:36

answered Aug 19, 2018 at 5:25

ArtisticPhoenix

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Comments

Shibbir · Accepted Answer · 2018-08-19 05:03:50Z

-2

OH, Yes, I found the way:

foreach ($tour_from as $key => $value) {
    $chunk = array_chunk($value, 2);
    foreach ($chunk as $key1 => $value1) {
       echo implode(' - ', $value1);
       echo '<br/>';                                                  
    }
 }

answered Aug 19, 2018 at 5:03

Shibbir

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