Populate array inside nested foreach PHP

Question

I have the following code. In the last foreach I'd like to add $last_array and $last2_array as key/value pairs inside $display array. Here's what I tried:

$display[] = array($last_array => $last2_array); //doesn't work
print_r($display); //under the loop prints nothing

The code:

$display=array();//declare the array outside the loop
foreach ($array as $arrays){ 
    foreach ($arrays as $elem) {
        unset($elem['id']); //Removes id key
        unset($elem['idno']); //Removes idno key
        foreach ($elem as $last_array => $last2_array) {
            //code here                       
            #echo $last_array. ": ".$last2_array."<br>";//This prints data, it's not empty.
        }       
        echo "<br>";
    }
}

Thanks in advance.

If you want to edit an array while looping with foreach, use &: foreach ($array as &$arrays){ — HamZa
– HamZa, Commented Jun 17, 2013 at 22:27
your array $display prints blank so how will it work anyway? how are you constructing the array $display? — amigura
– amigura, Commented Jun 17, 2013 at 22:35
@amigura: I tried with this code inside the last loop: $display[] = array($last_array => $last2_array); This doesn't work — user2494521
– user2494521, Commented Jun 17, 2013 at 22:38
just a guess. $display=array(1,2,3); you want to add 4 and 5 array_push($display, 4, 5); array push — amigura
– amigura, Commented Jun 17, 2013 at 22:42

Ziarno · Accepted Answer · 2013-06-17 22:38:16Z

1

$display=array();//declare the array outside the loop
foreach ($array as $arrays){ 
    foreach ($arrays as $elem) {
        unset($elem['id']); //Removes id key
        unset($elem['idno']); //Removes idno key
        foreach ($elem as $last_array => $last2_array) {
          $display[$last_array] = $last2_array;
        }       
    }
}

edited Jun 17, 2013 at 22:38

answered Jun 17, 2013 at 22:32

Ziarno

7,5725 gold badges37 silver badges41 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

user2494521 Over a year ago

Thanks! I think this will work! I'm having a strange issue, if I add your line of code I get this error from apache: Invalid argument supplied for foreach() in /var/www/search2.php on line 33. Line 33 Is the first foreach loop. If I replace your line with echo $last_array.$last2_array."<br>";. It prints data just fine with no errors. Guess I'll have to do some debugging!

user2494521 Over a year ago

It just got weirder... In order for your line to work I have to let the line that echoes the results, otherwise I get the error above and $display appears empty. I if leave the echo line in place print_r(display); shows only the last element from $last2_array. Array ( [object_id] => 549 [display_label] => test [ca_objects.description] => [ca_objects.type_id] => Audio )

Ziarno Over a year ago

maybe one of these is not an array but an object: $array, $arrays, $elem

user2494521 Over a year ago

This code gathers all elements: $display[] = array($last_array => $last2_array); But not in the way I want, it makes an array of each value. A print_r($display) portion: Array ( [0] => Array ( [object_id] => 13 ) [1] => Array ( [display_label] => La Bohème / PUCCINI - 2010 ) [2] => Array ( [ca_objects.description]. It's late here, guess I'll find it out after a good night sleep! Thanks for pointing me in the right direction.

amigura · Accepted Answer · 2013-06-17 23:19:00Z

0

i recommend you do a search on Multidimensional Arrays to learn abit more on creating and accessing them.

$object_id=$array['results'][0]['object_id'];
$display_label=$array['results'][0]['display_label'];

$display = array($object_id => $display_label);
print_r($display);

answered Jun 17, 2013 at 23:19

amigura

5393 silver badges6 bronze badges

1 Comment

user2494521 Over a year ago

I like that... I'll check the code later, thanks! I've been doing some serious reading but I'm too tired now, thanks again! I'll let you know the results.

Collectives™ on Stack Overflow

Populate array inside nested foreach PHP

2 Answers 2

4 Comments

1 Comment

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

2 Answers 2

4 Comments

1 Comment

Your Answer

Sign up or log in

Post as a guest

Related