Implode an inner array values

Question

An array

Array
(
    [0] => Array
    (
        [Detail] => Array
        (
            [detail_id] => 1
        )

    )

    [1] => Array
    (
        [Detail] => Array
        (
            [detail_id] => 4
        )

    )

)

Is it possible to use implode function with above array, because I want to implode detail_id to get 1,4.

I know it is possible by foreach and appending the array values, but want to know whether this is done by implode function or any other inbuilt function in PHP

Abel · Accepted Answer · 2012-03-30 20:04:04Z

3

What about something like the following, using join():

echo join(',', array_map(function ($i) { return $i['Detail']['detail_id']; }, $array));

edited Mar 30, 2012 at 20:04

Abel

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answered Mar 30, 2012 at 5:40

deceze♦

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Comments

Rob W · Accepted Answer · 2014-05-14 19:21:28Z

2

If you need to use some logic - then array_reduce is what you need

$result = array_reduce($arr, function($a, $b) {
    $result = $b['Detail']['detail_id'];

    if (!is_null($a)) {
        $result = $a . ',' . $result;
    }

    return $result;
});

PS: for php <= 5.3 you need to create a separate callback function for that

edited May 14, 2014 at 19:21

Rob W

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answered Mar 30, 2012 at 4:52

zerkms

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2 Comments

Justin John Over a year ago

If we use long array, whether this will slow down the process.

Tadeck Over a year ago

@Jusnit: For long array array_reduce() will be a lot faster and memory efficient than rajmohan's solution. This is because, unlike array_map(), it does not need an intermediary array to do the job.

rajmohan · Accepted Answer · 2012-03-30 06:27:29Z

2

Please check this answer.

$b = array_map(function($item) { return $item['Detail']['detail_id']; }, $test);

echo implode(",",$b);

edited Mar 30, 2012 at 6:27

answered Mar 30, 2012 at 5:20

rajmohan

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2 Comments

Tadeck Over a year ago

Oops, I upvoted your answer by mistake. This answer is incorrect.

rajmohan Over a year ago

Thanks @Tadeck. Please check this answer.

user798596 · Accepted Answer · 2012-03-30 04:53:27Z

0

<?php

$array = array(
    array('Detail' => array('detail_id' => 1)),
    array('Detail' => array('detail_id' => 4)),);

$newarray = array();

foreach($array as $items) {
    foreach($items as $details) {
        $newarray[] = $details['detail_id'];
    }
}

echo implode(', ', $newarray);

?>

answered Mar 30, 2012 at 4:53

user798596

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