PHP foreach from array

Question

I am using an api to show a list of times but struggling to display them in using foreach

Here is how the data is shown:

stdClass Object
(
    [id] => 2507525
    [snapshotTimes] => Array
        (
            [0] => 2020-10-02T04:04:41+00:00
            [1] => 2020-10-03T03:22:29+00:00
            [2] => 2020-10-04T03:06:43+00:00
            [3] => 2020-10-04T21:18:11+00:00
            [4] => 2020-10-06T03:07:12+00:00
            [5] => 2020-10-07T03:21:31+00:00
            [6] => 2020-10-10T03:43:00+00:00
            [7] => 2020-10-17T02:58:49+00:00
            [8] => 2020-10-19T02:57:35+00:00
            [9] => 2020-10-23T03:08:28+00:00
            [10] => 2020-10-26T04:02:51+00:00
            [11] => 2020-10-27T04:33:19+00:00
        )

)

Code:

$domainArray = $services_api->getWithFields("/package/2507525/web/timelineBackup/web");
foreach ($domainArray as $arr) {
    $Time = $arr->$domainArray->snapshotTimes;
    echo " TIME: $Time<br>";
}

But it doesn't seem to echo anything at all? Where am I going wrong?

`snapshotTimes` is an array, but you are treating it as if it was a string. you should probably run another inner `foreach` to cycle through all values within `snapshotTimes` . Check your PHP Error log. — Martin, Oct 27 '20 at 20:23
@Vogal oh go on then, if you insist..... see my example below — Martin, Oct 27 '20 at 20:31

0stone0 · Accepted Answer · 2020-10-27T20:53:01.853

2

Your code shows;

$Time = $arr->$domainArray->snapshotTimes;

Here you're tying to access a property called domainArray on the array given by the foreach(). No need to do that since your already using the foreach() to loop over the data;

$domainArray = $services_api->getWithFields("/package/2507525/web/timelineBackup/web");

// For each item in the 'snapshotTimes' array
foreach ($domainArray->snapshotTimes ?? [] as $time) {
    echo " TIME: {$time}<br>";
}

Try it online!

Note: Using the null coalescing operator (?? []) to ensure snapshotTimes exists in the data.

Based on comments; the same solution but with array_reverse() to reverse the output.

foreach (array_reverse($domainArray->snapshotTimes) as $time) {
    ....

Try it online!

edited Oct 27 '20 at 20:53

answered Oct 27 '20 at 20:28

0stone0

34,288
4
39
64

1

Nice use of the `??` operator. – Martin Oct 27 '20 at 20:40
This is fab, thanks. Is there a way of ordering them in the opposite way? Newest first? – Designer Oct 27 '20 at 20:49
@Designer Sure there is, take a look at: [`array_reverse`](https://www.php.net/manual/en/function.array-reverse.php) – 0stone0 Oct 27 '20 at 20:51

score 1 · Answer 2 · answered Oct 27 '20 at 20:32

1

You are triying to print snapshotTimes but you created a loop for another thing. If you want to print snapshotTimes code will be like :

foreach($arr->$domainArray->snapshotTimes as $time){
    echo $time."</br>";
}

answered Oct 27 '20 at 20:32

Filayer

51
4

Martin · Answer 3 · 2020-10-27T20:40:15.317

snapshotTimes is an array, but you are treating it as if it was a string. you should probably run another inner foreach to cycle through all values within snapshotTimes . Check your PHP Error log.

Perhaps an example would help him @Martin?

Example:

$domainArray = $services_api->getWithFields("/package/2507525/web/timelineBackup/web");
foreach ($domainArray as $arr) {
   if(is_array($arr->snapshotTimes) && count($arr->snapshotTimes) > 0 ){
    $times = $arr->snapshotTimes;
    foreach($times as $timeRow){
        echo " TIME: ".$timeRow."<br>";
    }
    unset($times); //tidy up temp vars.
    }
}

I underline the point that you need to check your PHP Error Log to help you diagnose these sort of structure issues.

Notes:

Your reference $arr->$domainArray->snapshotTimes within the foreach is incorrect, you're referencing both the foreach label as well as the source of the foreach label, which will result in an error.
PHP variables should start with a lower case letter.
If you don't need $domainArray => $arr for any other reason within the foreach loop, you can simplify the loop by looping the array rather than the container, as 0stone0 shows on their answer.

PHP foreach from array

3 Answers3

Example:

Notes: