Get value of key in nth level multidimensional array PHP

Question

I have a array with n depth. i have tried this but its not working for me.

array_walk_recursive($old_value, function($v, $k, $u) use (&$values){
            if($k == "tour_id") {
               $values[] = $v;
            }
        },  $values );

here is my array:

array(
 "ID" => 1,
 "settings" => array("key" => 1,"scrum" => array("last_key" =>1, "past_key" => 12) )
)

how to get past_key value efficiently.

Possible duplicate of Search for a key in an array, recursively — Nick Parsons
– Nick Parsons, Commented Feb 1, 2019 at 6:03

Progrock · Accepted Answer · 2019-02-01 09:42:11Z

2

You are almost there, but looking for the wrong key. Also the third argument passed to array_walk_recursive is passed as the third parameter to the callback (not needed for your needs, but I've added example use below).

<?php

$input = array(
 "ID" => 1,
 "settings" => array("key" => 1,"scrum" => array("last_key" =>1, "past_key" => 12) )
);

array_walk_recursive($input, function($v, $k, $needle_key) use (&$values){
    if($k == $needle_key) {
       $values[] = $v;
    }
},  'past_key');

var_dump($values);

Output:

array(1) {
    [0]=>
    int(12)
  }

answered Feb 1, 2019 at 9:42

Progrock

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1 Comment

Progrock Over a year ago

Of course the third param, could alternatively be inherited by the closure.

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