How to break a PHP multidimensional array? - php

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/>';
}
}

Answer 1

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>';
}

Answer 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];
});

Answer 3

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.

Answer 4

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/>';
}
}