I cant add any key value to my nested arrays

Question

I have $monTab, an array with nested arrays like this in php :

array (size=12)
  0 => 
    array (size=2)
      'mon' => string '2018-01-01 00:00:00' (length=19)
      'nb_argus' => string '29' (length=2)
  1 => 
    array (size=2)
      'mon' => string '2018-02-01 00:00:00' (length=19)
      'nb_argus' => string '21' (length=2)
  2 =>

I am simply trying to add this new pair of key value to each of the nested arrays :

'tx'  => int '50' (length=2)

So i've built a for each like that :

foreach($monTab as $item) {
      $item["tx"] = 50;
}

It doesnt work at all, var_dump($monTab) shows that nothing has happened !

the tx key is not added at all, the value is not added at all to my arrays !!

`foreach($monTab as $key => $item) { $monTab[$key]["tx"] = 50; }` works too. — Nghi Ho, Oct 16 '18 at 08:49
Possible duplicate of [PHP foreach change original array values](https://stackoverflow.com/questions/15024616/php-foreach-change-original-array-values) — Mohammad, Oct 16 '18 at 08:50
Thank you Mohammad , it is now working, you are good ! Have a nice day ! — jaja5000, Oct 16 '18 at 08:50
Possible duplicate of [PHP - Modify current object in foreach loop](https://stackoverflow.com/questions/10121483/php-modify-current-object-in-foreach-loop) — Lex Lustor, Oct 16 '18 at 08:53

score 1 · Answer 1 · answered Oct 16 '18 at 16:40

1

Due to the side effect of using pass by reference with foreach(...), using array_walk() or array_map() may be an idea.

array_walk($monTab, function(&$m){
    $m['tx'] = 50; 
});

answered Oct 16 '18 at 16:40

jj40308

21
5

I cant add any key value to my nested arrays

1 Answers1