PHP, Combining each array item to the previous ones [duplicate]

Question

I am building breadcrumbs and I would like to do it from all segments from the current url. I am getting the array that looks like this

$segments = [0 =>'users',
             1 =>'index',
             2 =>'all'];

I'd like to combine the array in this way :

$routes = [ 0 =>'users',
            1 =>'users/index',
            2 =>'users/index/all'];

I have tried using array_map

            $segs = array_map(function($a){return $a."/".$a;},$segments);

but it combines the same array item twice

Any help is appreciated.

Create a loop that goes over the array, concats the current string and adds the value to a new array. — Jerodev
– Jerodev, Commented Jul 3, 2015 at 9:49

Rizier123 · Accepted Answer · 2015-07-03 09:52:54Z

4

This should work for you:

Just loop through each element and take an array_slice() from the start until the current element, which you then simply can implode() with a slash.

<?php

    $segments = ["users", "index", "all"];

    foreach($segments as $k => $v)
        $result[] = implode("/", array_slice($segments, 0, ($k+1)));

    print_r($result);

?>

output:

Array
(
    [0] => users
    [1] => users/index
    [2] => users/index/all
)

answered Jul 3, 2015 at 9:52

Rizier123

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Comments

Community · Accepted Answer · 2017-05-23 11:58:18Z

0

If you want to do it using array_map() same as @Rizier123's method,

$segments = ['users','index','all'];

$routes = array_map(function($v, $k) use ($segments){
            return implode('/', array_slice($segments, 0, ($k+1)));
        }, $segments, array_keys($segments));

edited May 23, 2017 at 11:58

CommunityBot

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answered Jul 3, 2015 at 9:56

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1 Comment

Rizier123 Over a year ago

You may also want to initialize $till_now

Sunny S.M · Accepted Answer · 2015-07-03 10:30:46Z

0

Use this code to fix this issue :

$arr = array(0 =>'users', 1 =>'index', 2 =>'all');
print_r(returnPath($arr));

function returnPath($urlArr = null){
    $index = 1; $sep='';
    $length = count($urlArr);
    foreach($urlArr as $key => $item){   
        if($index > 1 && $index < $length){ $sep = '/'; }

        $temp .= $sep.$item; 
        $urlArr[$key] = $temp; 

    $index++;
    }

    return $urlArr;
}

answered Jul 3, 2015 at 10:30

Sunny S.M

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Comments

mickmackusa · Accepted Answer · 2022-08-11 14:56:11Z

0

To avoid slicing and imploding on every iteration, you can concatenate and ltrim instead.

Code: (Demo)

$segments = ["users", "index", "all"];

var_export(
    array_map(
        function($v) {
            static $path = '';
            return ltrim($path .= "/$v", '/');
        },
        $segments
    )
);

Output:

array (
  0 => 'users',
  1 => 'users/index',
  2 => 'users/index/all',
)

answered Aug 11, 2022 at 14:56

mickmackusa♦

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