Merge branch '2.7' into 2

Fix arguments order in SolrIndexCheck

.github/workflows/ci.yml

@@ -4,13 +4,8 @@ on:
   push:
   pull_request:
   workflow_dispatch:
-  # Every Wednesday at 1:20pm UTC
-  schedule:
-    - cron: '20 13 * * 3'
 
 jobs:
   ci:
     name: CI
-    # Only run cron on the silverstripe account
-    if: (github.event_name == 'schedule' && github.repository_owner == 'silverstripe') || (github.event_name != 'schedule')
     uses: silverstripe/gha-ci/.github/workflows/ci.yml@v1

.github/workflows/dispatch-ci.yml

@@ -0,0 +1,16 @@
+name: Dispatch CI
+
+on:
+  # At 1:20 PM UTC, only on Wednesday and Thursday
+  schedule:
+    - cron: '20 13 * * 3,4'
+
+jobs:
+  dispatch-ci:
+    name: Dispatch CI
+    # Only run cron on the silverstripe account
+    if: (github.event_name == 'schedule' && github.repository_owner == 'silverstripe') || (github.event_name != 'schedule')
+    runs-on: ubuntu-latest
+    steps:
+      - name: Dispatch CI
+        uses: silverstripe/gha-dispatch-ci@v1

composer.json

@@ -38,4 +38,4 @@
     },
     "minimum-stability": "dev",
     "prefer-stable": true
-}
+}

src/Checks/SolrIndexCheck.php

@@ -43,7 +43,7 @@ class SolrIndexCheck implements EnvironmentCheck
         if (!empty($brokenCores)) {
             return [
                 EnvironmentCheck::ERROR,
-                'The following indexes are unavailable: ' . implode($brokenCores ?? '', ', ')
+                'The following indexes are unavailable: ' . implode(', ', $brokenCores)
             ];
         }