Exception: Warning: Trying to access array offset in... -> Calendar.php since upgrade to ICU 74.1 (PHP Intl)

[Munktells]

Preconditions and environment

Magento version 2.4.6-P3.
PHP v8.1.25.
ICU 74.1 (required by PHP Intl)
FreeBSD 13.2-RELEASE-p5

Steps to reproduce

Install the above versions and visit either the backend or the frontend.

Expected result

No errors in var/log/exception.log

Actual result

Errors on each store visit in exception.log:

main.CRITICAL: Exception: Warning: Trying to access array offset on value of type null in /vendor/magento/framework/View/Element/Html/Calendar.php on line 114 in /vendor/magento/framework/App/ErrorHandler.php:62

Additional information

Magento is using 'Swedish' as locale, and doesn't use am or pm (24 hrs). Set on Scope -> Default Config
Stores -> Configurations -> General -> Locale Options -> Locale
Magento is set up with 8 web sites, stores and views.

Line 114 in Calendar.php:

$this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['0']));

Triage and priority

• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.

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[Keivanph]

Hi,
Any updates on this error?
I am recently getting this error on
M2.4.5-p4 and php 8.1

[hostep]

We're also seeing this over here.
Error triggers on product detail pages, $localeData['calendar']['gregorian']['AmPmMarkers'] is null in our case.

Using:

• PHP 8.2.14
• ICU 74.1 (also tried upgrading to 74.2 but doesn't resolve the problem)
• Magento 2.4.6-p3
• Locale: nl_NL

This quickfix seems to work (no idea if this is the correct way to solve it though):

diff --git a/lib/internal/Magento/Framework/View/Element/Html/Calendar.php b/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
index 884488d77a7..e20c7882cff 100644
--- a/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
+++ b/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
@@ -111,8 +111,8 @@ class Calendar extends \Magento\Framework\View\Element\Template
         $this->assignFieldsValues($localeData);

         // get "am" & "pm" words
-        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['0']));
-        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['1']));
+        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['0'] ?? null));
+        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['1'] ?? null));

         // get first day of week and weekend days
         $this->assign(

[hostep]

Simplest way to reproduce (just tried this on latest commit from 2.4-develop branch):

Preconditions:

• PHP 8.2.x
• ICU library version 74.1 or 74.2 (dependency of the php-intl extension)

Steps to reproduce:

1. Setup clean Magento
2. Configure nl_NL locale: bin/magento config:set general/locale/code nl_NL
3. In backoffice, go to Stores > Attributes > Product
4. Find and edit the special_from_date attribute
5. Under Storefront Properties, enable both 'Use in Search' and 'Visible in Advanced Search' and save the attribute
6. Reindex & flush caches
7. In frontend click on the Advanced Search link in the footer
8. You'll see this error:

1 exception(s):
Exception #0 (Exception): Warning: Trying to access array offset on value of type null in lib/internal/Magento/Framework/View/Element/Html/Calendar.php on line 114

Exception #0 (Exception): Warning: Trying to access array offset on value of type null in lib/internal/Magento/Framework/View/Element/Html/Calendar.php on line 114
<pre>#1 Magento\Framework\View\Element\Html\Calendar->_toHtml() called at [lib/internal/Magento/Framework/View/Element/AbstractBlock.php:1117]
#2 Magento\Framework\View\Element\AbstractBlock->Magento\Framework\View\Element\{closure}() called at [lib/internal/Magento/Framework/View/Element/AbstractBlock.php:1121]
#3 Magento\Framework\View\Element\AbstractBlock->_loadCache() called at [lib/internal/Magento/Framework/View/Element/AbstractBlock.php:670]
#4 Magento\Framework\View\Element\AbstractBlock->toHtml() called at [lib/internal/Magento/Framework/View/Layout.php:578]
#5 Magento\Framework\View\Layout->_renderBlock() called at [lib/internal/Magento/Framework/View/Layout.php:555]
#6 Magento\Framework\View\Layout->renderNonCachedElement() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:149]
#7 Magento\Framework\View\Layout\Interceptor->renderNonCachedElement() called at [lib/internal/Magento/Framework/View/Layout.php:510]
#8 Magento\Framework\View\Layout->renderElement() called at [generated/code/Magento/Framework/View/Layout/Interceptor.php:140]
#9 Magento\Framework\View\Layout\Interceptor->renderElement() called at [lib/internal/Magento/Framework/View/Layout.php:606]
#10 Magento\Framework\View\Layout->_renderContainer() called at [lib/internal/Magento/Framework/View/Layout.php:557]
...

[hostep]

After some more looking into and seeing how the ICU data changed between versions 73.2 and 74.1 (this is the commit), it looks like we should use AmPmMarkersAbbr instead of AmPmMarkers.

Also, using the index as a string (['0']) never ever worked, it should have been used as a int ([0])

So I would suggest this change now:

diff --git a/lib/internal/Magento/Framework/View/Element/Html/Calendar.php b/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
index 884488d77a7..28a59b28616 100644
--- a/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
+++ b/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
@@ -111,8 +111,8 @@ class Calendar extends \Magento\Framework\View\Element\Template
         $this->assignFieldsValues($localeData);

         // get "am" & "pm" words
-        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['0']));
-        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['1']));
+        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkersAbbr'][0]));
+        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkersAbbr'][1]));

         // get first day of week and weekend days
         $this->assign(

However, this code in core Magento has existed for over 9 years (was introduced here), and never worked, also the datetime picker widget only shows dates and not times, so I'm not sure if we even need that am/pm notation at all. So maybe we should just remove those two lines and be done with it?

[hostep]

I just wrote this (dirty) script to be put in pub/test.php and then openend via https://base-url/test.php, it goes over all locale's supported by Magento and outputs a table to see which locale supports which amPmMarker key:

<?php

require_once('../vendor/autoload.php');

use Magento\Framework\Locale\Bundle\DataBundle as LocaleDataBundle;
use Magento\Framework\Locale\Config as LocaleConfig;

$locales = (new LocaleConfig())->getAllowedLocales();

$amPmMarkersKeys = ['AmPmMarkers', 'AmPmMarkersAbbr', 'AmPmMarkersNarrow'];

echo sprintf('<h1 style="text-align: center">ICU version: %s</h1>', getIcuVersion());

echo '<table width="100%"><thead><tr><th></th>';
foreach ($amPmMarkersKeys as $key) { echo sprintf('<th>%s</th>', $key); }
echo "</tr></thead><tbody>\n";

$countPerKey = [];

foreach ($locales as $locale) {
    echo sprintf('<tr><th>%s</th>', $locale);

    $localeData = (new LocaleDataBundle())->get($locale);

    foreach ($amPmMarkersKeys as $key) {
        $exists = $localeData['calendar']['gregorian'][$key] ? true : false;
        $values = [];
        if ($exists) {
            $count = $localeData['calendar']['gregorian'][$key]->count();
            for ($i = 0; $i < $count; ++$i) {
                $values[] = $localeData['calendar']['gregorian'][$key][$i];
            }
        }

        $output = $exists ? implode(', ', $values) : 'doesn\'t exists';
        $color = $exists ? '#c3e6cb' : '#f5c6cb';

        echo sprintf('<td bgcolor="%s">%s</td>', $color, $output);

        if ($exists) {
            if (!array_key_exists($key, $countPerKey)) {
                $countPerKey[$key] = 0;
            }
            ++$countPerKey[$key];
        }
    }

    echo "</tr>\n";
}

echo '<tr><th>Total</th>';

foreach ($amPmMarkersKeys as $key) {
    echo sprintf('<td><b>%d</b></td>', $countPerKey[$key]);
}

echo '</tr></tbody></table>';

// borrowed from https://github.com/symfony/intl/blob/5fbee19d24354bbd77b300971eb38469ddbfd7fc/Intl.php#L71-L94
function getIcuVersion(): string
{
    $reflector = new \ReflectionExtension('intl');
    ob_start();
    $reflector->info();
    $output = strip_tags(ob_get_clean());
    preg_match('/^ICU version (?:=>)?(.*)$/m', $output, $matches);

    return $matches[1];
}

Results with ICU 74.1:

Results with ICU 69.1:

If somebody wants to test with other versions of ICU, feel free to do so and post the results!

It seems like a lot of data disappeared in the latest version of ICU, no idea why, maybe this is a bug on their end?

Anyway, based on the results from ICU 74.1, it looks like no key is supported by each locale, the key that has the most support is AmPmMarkersAbbr at the moment, so if we decide to keep these 2 lines of code, I vote we use that one. But add a fallback to null in case it doesn't exist.

So then I would propose we make this change to the core code:

diff --git a/lib/internal/Magento/Framework/View/Element/Html/Calendar.php b/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
index 884488d77a7..28a59b28616 100644
--- a/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
+++ b/lib/internal/Magento/Framework/View/Element/Html/Calendar.php
@@ -111,8 +111,8 @@ class Calendar extends \Magento\Framework\View\Element\Template
         $this->assignFieldsValues($localeData);

         // get "am" & "pm" words
-        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['0']));
-        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['1']));
+        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkersAbbr'][0] ?? null));
+        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkersAbbr'][1] ?? null));

         // get first day of week and weekend days
         $this->assign(

Update: I've changed my mind again, see my new proposal in #38364

[andrewbess]

Hello @Munktells
Thank you for your collaboration

Hello @hostep
Thank you to your contribution here
I\ll review your PR

[m2-assistant]

Hi @engcom-Hotel. Thank you for working on this issue.
In order to make sure that issue has enough information and ready for development, please read and check the following instruction: 👇

• 1. Verify that issue has all the required information. (Preconditions, Steps to reproduce, Expected result, Actual result).
• 2. Verify that issue has a meaningful description and provides enough information to reproduce the issue.
• 3. Add Area: XXXXX label to the ticket, indicating the functional areas it may be related to.
• 4. Verify that the issue is reproducible on 2.4-develop branch
  Details

  - Add the comment @magento give me 2.4-develop instance to deploy test instance on Magento infrastructure.
  - If the issue is reproducible on 2.4-develop branch, please, add the label Reproduced on 2.4.x.
  - If the issue is not reproducible, add your comment that issue is not reproducible and close the issue and stop verification process here!
• 5. Add label Issue: Confirmed once verification is complete.
• 6. Make sure that automatic system confirms that report has been added to the backlog.

[engcom-Hotel]

Hello @Munktells,

Thanks for the report and collaboration!

Thanks @hostep for the updated steps to reproduce.

We have tried to reproduce the issue in the 2.4-develop branch but it seems the issue is not reproducible for us. Please refer to the below screenshots and let us know if we missed anything:

• ICU Version:
  

• PHP Version: 8.1.2

• Locale: nl_NL
  

Marking this issue as Needs Update for now.

Thanks

[hostep]

@engcom-Hotel: it definitely is reproducible.

Are you 100% sure your PHP is using ICU version 74.x? You may need to recompile the php-intl extension.
Can you try my dirty test script from this comment: #38214 (comment)
It will output the ICU version used at the top.

Or alternatively, you can run php -i | grep 'ICU version' to view the version used.

[guvra]

FYI this also happens on Alpine 3.19 with the following versions of ICU:

icu-data-full-74.1-r0 x86_64 {icu} (ICU) [installed]
icu-libs-74.1-r0 x86_64 {icu} (ICU) [installed]

Locale tested: fr.
Page tested: login page of admin area.

[hostep]

@engcom-Hotel: can you please retry to reproduce? More and more people are running into the problem ...
It would be appreciated if #38364 would get some more attention and gets included in Magento 2.4.7 if possible...

[engcom-Hotel]

Hello @Munktells @hostep,

We have tried to reproduce the issue with the mentioned prerequisites and the issue is reproducible for us with the below-mentioned steps:

Manual testing scenarios (*)

1. Setup clean Magento
2. In the admin panel, go to Stores > Attributes > Product
3. Find and edit the special_from_date attribute
4. Under Storefront Properties, enable both 'Use in Search' and 'Visible in Advanced Search' and save the attribute
5. Reindex
6. Edit the file app/code/Magento/Theme/view/frontend/templates/js/calendar.phtml and add this line at the very bottom: <ul><li>am: <?= $am; ?></li><li>pm: <?= $pm; ?></li></ul>
7. Configure "lv_LV" locale: bin/magento config:set general/locale/code lv_LV
8. Flush the caches
9. In frontend click on the Advanced Search link in the footer
10. Expected to see "priekšpusdienā" & "pēcpusdienā" (but then escaped for JS)
11. Expected to see "null" & "null"

Please refer to the below screenshot for reference:

Hence confirming the PR.

Thanks

[github-jira-sync-bot]

✅ Jira issue https://jira.corp.adobe.com/browse/AC-11423 is successfully created for this GitHub issue.

[m2-assistant]

✅ Confirmed by @engcom-Hotel. Thank you for verifying the issue.
Issue Available: @engcom-Hotel, You will be automatically unassigned. Contributors/Maintainers can claim this issue to continue. To reclaim and continue work, reassign the ticket to yourself.

[hostep]

@engcom-Hotel: those are incorrect steps, the correct steps are mentioned earlier in this comment: #38214 (comment)

Have you already figured out how to run php with ICU library version 74.x?

[engcom-Hotel]

Yes @hostep,

I compiled the PHP with ICU version 74.1, and after compilation, running the below command was showing ICU version as 74.1:

`php -i | grep 'ICU version``

[webcreative24]

how to fix it?

[hostep]

@webcreative24: apply changes from #38364, that works for us.

[PieterCappelle]

Same issue here with Magento 2.4.7 ... :)

Exception #0 (Exception): Warning: Trying to access array offset on value of type null in /vendor/magento/framework/View/Element/Html/Calendar.php on line 114

php -i | grep 'ICU version'
ICU version => 74.2

Create file patches/composer/github-issue-38364.diff

diff --git a/View/Element/Html/Calendar.php b/View/Element/Html/Calendar.php
index 884488d77a74f..cf8f2e3e789e6 100644
--- a/View/Element/Html/Calendar.php
+++ b/View/Element/Html/Calendar.php
@@ -109,10 +109,7 @@ protected function _toHtml()
         );

         $this->assignFieldsValues($localeData);
-
-        // get "am" & "pm" words
-        $this->assign('am', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['0']));
-        $this->assign('pm', $this->encoder->encode($localeData['calendar']['gregorian']['AmPmMarkers']['1']));
+        $this->assignAmPmWords($localeData);

         // get first day of week and weekend days
         $this->assign(
@@ -209,4 +206,23 @@ private function assignFieldsValues(\ResourceBundle $localeData): void
             $this->assign('week', $this->encoder->encode($localeData['fields']['week']['dn']));
         }
     }
+
+    /**
+     * Assign "am" & "pm" words from the ICU data
+     *
+     * @param \ResourceBundle $localeData
+     */
+    private function assignAmPmWords(\ResourceBundle $localeData): void
+    {
+        // AmPmMarkers and AmPmMarkersAbbr aren't guaranteed to exist, so fallback to null if neither exist
+        $amWord = $localeData['calendar']['gregorian']['AmPmMarkers'][0] ??
+                  $localeData['calendar']['gregorian']['AmPmMarkersAbbr'][0] ??
+                  null;
+        $pmWord = $localeData['calendar']['gregorian']['AmPmMarkers'][1] ??
+                  $localeData['calendar']['gregorian']['AmPmMarkersAbbr'][1] ??
+                  null;
+
+        $this->assign('am', $this->encoder->encode($amWord));
+        $this->assign('pm', $this->encoder->encode($pmWord));
+    }
 }
diff --git a/View/Test/Unit/Element/Html/CalendarTest.php b/View/Test/Unit/Element/Html/CalendarTest.php
index 94d3dbb660f6b..51e5834fe8507 100644
--- a/View/Test/Unit/Element/Html/CalendarTest.php
+++ b/View/Test/Unit/Element/Html/CalendarTest.php
@@ -48,6 +48,9 @@ public function localesDataProvider()
             ['en_US'],
             ['ja_JP'],
             ['ko_KR'],
+            ['lv_LV'],
+            ['sv_SE'],
+            ['de_AT'],
         ];
     }

Add to composer.json

    "extra": {
        "magento-force": "override",
        "composer-exit-on-patch-failure": true,
        "patches": {
            "magento/framework": {
                "ICU library where AmPmMarkers": "patches/composer/github-issue-38364.diff"
            }
        }
    }

Many thanks to @hostep! 💯

[tuyennn]

• +1 issue on ICU version => 74.2 & Magento 2.4.3-p3 ro_RO

[elburro1887]

Same issue here

• Magento 2.4.0
• PHP 7.4.33
• ICU 74.2
• de_DE

[gbobts]

Fix is available on the 2.4-develop branch but ommited on the 2.4.7 branches 144b491

Could it be possible that the fix was forgotten by the dev team ?

[hostep]

The fix was unfortunately only merged (16 May 2024) after Magento 2.4.7 was released (9 April 2024), so it will be included in 2.4.8 which is to be released on 8 April 2025.

See some comments earlier for how to backport this fix using a patch using https://github.com/vaimo/composer-patches or https://github.com/cweagans/composer-patches/ or ...

[erwinromkes]

or... a public Gist

"patches": {
  "magento/framework": {
      "ICU library where AmPmMarkers": "https://gist.githubusercontent.com/erwinromkes/80d4db93764bd30b232b75b3f8b780de/raw/26ef659113735ab79c1440c6e63033496fc16039/github-issue-38364.diff"
  }
}

[cptX]

Same problem with magento 2.4.7-p3, php 8.3 and ICU 74.2 and greek locale!
Why don't they provide these fixes in -px versions?

[Nurgiel]

Same issue on Ubuntu 24.04.1 LTS.
I want to downgrade PHP to 8.2.26 to PHP 8.2.19 (php version used on adobe cloud) instead of fixing it with a patch, but:
add-apt-repository -y ppa:ondrej/php
apt-cache madison php8.2 only has php 8.2.26 available

Any hints on downgrading PHP? Do I need to find php8.2.19 .deb file and install it from .deb file after apt purge or is there a better way?

[ctadlock]

Its really quite amazing that a fix that is a couple of single quotes takes 17 months to be released.

[hostep]

The fix for this issue got added as a patch to Magento's Quality Patches repo in version 1.1.57 yesterday with the name ACSD-63326 in case anybody cares :)

[mzeis]

@hostep Thanks a lot for pointing this out!

Interestingly, the Adobe team documented another context that creates this error ("ACSD-63326: Fix admin redirection issue after placing an order from the backend"), but as long as we can use an official patch to fix this problem, we shouldn't complain, right?