php- why traversing multidimensional array inside the foreach() doesnt work - php

Question

I"m trying to traverse on an object i"m getting from openweather.com
without the foreach() i"m getting the right result. inside the foreach() i get an error.
the php code:
$contents = file_get_contents($url);
$clima=json_decode($contents,TRUE);
echo $clima['list'][5]['main']['temp']; // this one works
$i=0;
foreach($clima['list'] as $clima1) {
echo $clima1[$i]['dt']; // here i get PHP Notice: Undefined offset
echo $clima1[$i]['main']['temp']; //here i get PHP Notice: Undefined index: list
$i=$i+1;
}
the error that i get is:
PHP Notice: Undefined offset: 0 // the error is from 0 to 39 and there are 39 objects...
PHP Notice: Undefined index: list
the object beginning and ending part for sample:
Array ( [cod] => 200 [message] => 0.014 [cnt] => 40 [list] =>
Array ( [0] => Array ( [dt] => 1492732800 [main] => Array ( [temp] => 17.64 [temp_min] => 17.04 [temp_max] => 17.64 [pressure] => 1026.03 [sea_level] => 1031.21 [grnd_level] => 1026.03 [humidity] => 100 [temp_kf] => 0.6 ) [weather] => Array ( [0] => Array ( [id] => 800 [main] => Clear [description] => clear sky [icon] => 01n ) ) [clouds] => Array ( [all] => 0 ) [wind] => Array ( [speed] => 1.66 [deg] => 81.5008 ) [sys] => Array ( [pod] => n ) [dt_txt] => 2017-04-21 00:00:00 )
[38] => Array ( [dt] => 1493143200 [main] => Array ( [temp] => 19.72 [temp_min] => 19.72 [temp_max] => 19.72 [pressure] => 1026.92 [sea_level] => 1032.02 [grnd_level] => 1026.92 [humidity] => 87 [temp_kf] => 0 ) [weather] => Array ( [0] => Array ( [id] => 800 [main] => Clear [description] => clear sky [icon] => 01n ) ) [clouds] => Array ( [all] => 0 ) [wind] => Array ( [speed] => 6.95 [deg] => 10.5008 ) [sys] => Array ( [pod] => n ) [dt_txt] => 2017-04-25 18:00:00 )
[39] => Array ( [dt] => 1493154000 [main] => Array ( [temp] => 18.43 [temp_min] => 18.43 [temp_max] => 18.43 [pressure] => 1026.75 [sea_level] => 1031.91 [grnd_level] => 1026.75 [humidity] => 98 [temp_kf] => 0 ) [weather] => Array ( [0] => Array ( [id] => 800 [main] => Clear [description] => clear sky [icon] => 01n ) ) [clouds] => Array ( [all] => 0 ) [wind] => Array ( [speed] => 6.03 [deg] => 9.50076 ) [sys] => Array ( [pod] => n ) [dt_txt] => 2017-04-25 21:00:00 ) )
[city] => Array ( [id] => **** [name] => ***** [coord] => Array ( [lat] => **.**** [lon] => **.**** ) [country] => ** ) )
any help to understand my mistake will be appreciated

Answer 1

It seems, you loop "double". The counter inside the loop is the part, which you don't need, as you already loop over the array with foreach.
I think, the following code would be the better approach
$contents = file_get_contents($url);
$clima=json_decode($contents,TRUE);
echo $clima['list'][5]['main']['temp']; // this one works
foreach($clima['list'] as $clima1) {
echo $clima1['dt']; // here i get PHP Notice: Undefined offset
echo $clima1['main']['temp']; //here i get PHP Notice: Undefined index: list
}

Answer 2

That is because when you foreach over $clima['list'] you will get every values inside $clima['list']. Therefore, first, $clima1 = $clima['list'][0]. After that, $clima1 = $clima['list'][1]... Thus, $clima1 has neither 0 as an index nor 1 nor 2...
What you might do to see it more clearly is this :
foreach($clima['list'] as $key => $clima1)
And everytime, the $key will be your $id. Therefore, you can get rid of your $id and just do it like this :
foreach($clima['list'] as $id => $clima1)

Answer 3

When you run foreach($clima['list'] as $clima1) { ... each object in the loop ($clima1) is equal to $clima['list'][$i] so you don't need to manually put the $i in there.
If your really stuck I'd just run the loop like:
foreach($clima['list'] as $clima1) {
var_dump('<pre>' . $clima1 . '</pre>');
}
To see what the $clima1 variable really is.