PHP Looping through array recursive

Question

I want to loop through an array in PHP. The loop must be recursive, because I don't now how many arrays-in-arrays there are. It is for reading translations in Symfony2.

The output format is:

a.d.e
a.f.g
b.h.i
c.j.k.l.m
c.n.o

with example array:

$array = array(
    'a' => array('d' => 'e', 'f' => 'g'),
    'b' => array('h' => 'i'),
    'c' => array(
        'j' => array(
            'k' => array(
                'l' => 'm')),
        'n' => 'o'));

I have tried the following, but this is not a final solution, but the recursion is working:

function displayArrayRecursively($array)
{
    foreach ($array as $key => $value) {

        if (is_array($value)) {
            echo $key . '<br>';
            displayArrayRecursively($value);
        } else {

            echo $key . '<br>' . $value . '<br>';       
        }
    }
}

Thanks in advance!

Sounds like you want a trie datastructure

Mark Baker
– Mark Baker

2014-06-17 09:03:00 +00:00
Commented Jun 17, 2014 at 9:03 — Mark Baker
– Mark Baker, Commented Jun 17, 2014 at 9:03

Tim Hovius · Accepted Answer · 2014-06-17 09:58:19Z

3

I guess your function just output

a
d
e
...

Something like this should work :

displayArrayRecursively($array, null);

function displayArrayRecursively($array, $keysString = '')
{
    if (is_array($array)) {
        foreach ($array as $key => $value) {
            displayArrayRecursively($value, $keysString . $key . '.');
        }
    } else {
        echo $keysString . $array . '<br/> ';
    }
}

It should be pretty close to what you need.

edited Jun 17, 2014 at 9:58

Tim Hovius

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answered Jun 17, 2014 at 9:29

Meeuuuhhhh

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Comments

Alcalyn · Accepted Answer · 2014-06-17 09:46:52Z

0

This function does what you want:

function displayArrayRecursively($array, $tree = array()) {
    foreach ($array as $key => $value) {
        if (is_array($value)) {
            displayArrayRecursively($value, array_merge($tree, array($key)));
        } else {
            print implode('.', array_merge($tree, array($key, $value)));
            print "\n<br />";
        }
    }
}

Output:

a.d.e
a.f.g
b.h.i
c.j.k.l.m
c.n.o

edited Jun 17, 2014 at 9:46

answered Jun 17, 2014 at 9:41

Alcalyn

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Comments

tungbk29 · Accepted Answer · 2014-06-17 09:58:11Z

0

Function you want

function displayArrayRecursively($array, $parent = '')
{
    foreach ($array as $key => $value) {

        if (is_array($value)) {
            if(count($value) == 1 && !empty($parent))
                $key = $parent . $key;
            displayArrayRecursively($value, $key);
        } else {
            echo $parent;
            echo $key . $value . '<br>';       
        }
    }
}

answered Jun 17, 2014 at 9:58

tungbk29

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