ENH PHP 8.1 compatibility

src/Extensions/FileSubsites.php

@@ -77,8 +77,8 @@ class FileSubsites extends DataExtension
             break;
         }
 
-        $sect = array_values($query->getSelect());
+        $sect = array_values($query->getSelect() ?? []);
-        $isCounting = strpos($sect[0], 'COUNT') !== false;
+        $isCounting = strpos($sect[0] ?? '', 'COUNT') !== false;
 
         // Ordering when deleting or counting doesn't apply
         if (!$isCounting) {

src/Extensions/GroupSubsites.php

@@ -106,7 +106,7 @@ class GroupSubsites extends DataExtension implements PermissionProvider
                     $subsiteMap
                 ));
             } else {
-                if (sizeof($subsiteMap) <= 1) {
+                if (sizeof($subsiteMap ?? []) <= 1) {
                     $fields->addFieldToTab('Root.Subsites', new ReadonlyField(
                         'SubsitesHuman',
                         _t(__CLASS__ . '.ACCESSRADIOTITLE', 'Give this group access to'),
@@ -133,10 +133,10 @@ class GroupSubsites extends DataExtension implements PermissionProvider
     {
         if ($this->owner->AccessAllSubsites) {
             $title = _t(__CLASS__ . '.GlobalGroup', 'global group');
-            $title = htmlspecialchars($this->owner->Title, ENT_QUOTES) . ' <i>(' . $title . ')</i>';
+            $title = htmlspecialchars($this->owner->Title ?? '', ENT_QUOTES) . ' <i>(' . $title . ')</i>';
         } else {
             $subsites = Convert::raw2xml(implode(', ', $this->owner->Subsites()->column('Title')));
-            $title = htmlspecialchars($this->owner->Title) . " <i>($subsites)</i>";
+            $title = htmlspecialchars($this->owner->Title ?? '') . " <i>($subsites)</i>";
         }
     }
 
@@ -168,10 +168,10 @@ class GroupSubsites extends DataExtension implements PermissionProvider
             $hasGroupSubsites = false;
             foreach ($query->getFrom() as $item) {
                 if ((is_array($item) && strpos(
-                    $item['table'],
+                    $item['table'] ?? '',
                     'Group_Subsites'
                 ) !== false) || (!is_array($item) && strpos(
-                    $item,
+                    $item ?? '',
                     'Group_Subsites'
                 ) !== false)
                 ) {
@@ -227,7 +227,7 @@ class GroupSubsites extends DataExtension implements PermissionProvider
 
         // We are allowed to access this site if at we have CMS_ACCESS_SecurityAdmin permission on
         // at least one of the sites
-        return (bool)array_intersect($accessibleSites, $linkedSites);
+        return (bool)array_intersect($accessibleSites ?? [], $linkedSites);
     }
 
     public function providePermissions()

src/Extensions/LeftAndMainSubsites.php

@@ -118,7 +118,7 @@ class LeftAndMainSubsites extends LeftAndMainExtension
         // Find sites that satisfy all codes conjuncitvely.
         $accessibleSites = new ArrayList();
         foreach ($codesPerSite as $siteID => $siteCodes) {
-            if (count($siteCodes) == count($codes)) {
+            if (count($siteCodes ?? []) == count($codes ?? [])) {
                 $accessibleSites->push($sitesArray[$siteID]);
             }
         }
@@ -169,7 +169,7 @@ class LeftAndMainSubsites extends LeftAndMainExtension
 
     public function alternateMenuDisplayCheck($controllerName)
     {
-        if (!class_exists($controllerName)) {
+        if (!class_exists($controllerName ?? '')) {
             return false;
         }
 
@@ -387,7 +387,7 @@ class LeftAndMainSubsites extends LeftAndMainExtension
         if ($record->hasMethod('NormalRelated') && ($record->NormalRelated() || $record->ReverseRelated())) {
             $this->owner->response->addHeader(
                 'X-Status',
-                rawurlencode(_t(__CLASS__ . '.Saved', 'Saved, please update related pages.'))
+                rawurlencode(_t(__CLASS__ . '.Saved', 'Saved, please update related pages.') ?? '')
             );
         }
     }

src/Extensions/SiteConfigSubsites.php

@@ -37,7 +37,7 @@ class SiteConfigSubsites extends DataExtension
         }
         $regexp = '/^(.*\.)?("|`)?SubsiteID("|`)?\s?=/';
         foreach ($query->getWhereParameterised($parameters) as $predicate) {
-            if (preg_match($regexp, $predicate)) {
+            if (preg_match($regexp ?? '', $predicate ?? '')) {
                 return;
             }
         }
@@ -48,7 +48,7 @@ class SiteConfigSubsites extends DataExtension
         }
 
         $froms = $query->getFrom();
-        $froms = array_keys($froms);
+        $froms = array_keys($froms ?? []);
         $tableName = array_shift($froms);
         if ($tableName !== SiteConfig::getSchema()->tableName(SiteConfig::class)) {
             return;

src/Extensions/SiteTreeSubsites.php

@@ -90,7 +90,7 @@ class SiteTreeSubsites extends DataExtension
         foreach ($query->getFrom() as $tableName => $info) {
             // The tableName should be SiteTree or SiteTree_Live...
             $siteTreeTableName = SiteTree::getSchema()->tableName(SiteTree::class);
-            if (strpos($tableName, $siteTreeTableName) === false) {
+            if (strpos($tableName ?? '', $siteTreeTableName ?? '') === false) {
                 break;
             }
             $query->addWhere("\"$tableName\".\"SubsiteID\" IN ($subsiteID)");
@@ -341,7 +341,7 @@ class SiteTreeSubsites extends DataExtension
         }
 
         // Return true if they have access to this object's site
-        if (!(in_array(0, $goodSites) || in_array($subsiteID, $goodSites))) {
+        if (!(in_array(0, $goodSites ?? []) || in_array($subsiteID, $goodSites ?? []))) {
             return false;
         }
     }
@@ -413,7 +413,7 @@ class SiteTreeSubsites extends DataExtension
         // This helps deal with Link() returning an absolute URL.
         $url = Director::absoluteURL($this->owner->Link($action));
         if ($this->owner->SubsiteID) {
-            $url = preg_replace('/\/\/[^\/]+\//', '//' . $this->owner->Subsite()->domain() . '/', $url);
+            $url = preg_replace('/\/\/[^\/]+\//', '//' . $this->owner->Subsite()->domain() . '/', $url ?? '');
         }
         return $url;
     }
@@ -471,11 +471,13 @@ class SiteTreeSubsites extends DataExtension
 
         if ($links) {
             foreach ($links as $link) {
-                if (substr($link, 0, strlen('http://')) == 'http://') {
+                if (substr($link ?? '', 0, strlen('http://')) == 'http://') {
-                    $withoutHttp = substr($link, strlen('http://'));
+                    $withoutHttp = substr($link ?? '', strlen('http://'));
-                    if (strpos($withoutHttp, '/') && strpos($withoutHttp, '/') < strlen($withoutHttp)) {
+                    if (strpos($withoutHttp ?? '', '/') &&
-                        $domain = substr($withoutHttp, 0, strpos($withoutHttp, '/'));
+                        strpos($withoutHttp ?? '', '/') < strlen($withoutHttp ?? '')
-                        $rest = substr($withoutHttp, strpos($withoutHttp, '/') + 1);
+                    ) {
+                        $domain = substr($withoutHttp ?? '', 0, strpos($withoutHttp ?? '', '/'));
+                        $rest = substr($withoutHttp ?? '', strpos($withoutHttp ?? '', '/') + 1);
 
                         $subsiteID = Subsite::getSubsiteIDForDomain($domain);
                         if ($subsiteID == 0) {
@@ -548,9 +550,9 @@ class SiteTreeSubsites extends DataExtension
         $subsite = Subsite::currentSubsite();
         if ($subsite && $subsite->exists() && $subsite->PageTypeBlacklist) {
             // SS 4.1: JSON encoded. SS 4.0, comma delimited
-            $blacklist = json_decode($subsite->PageTypeBlacklist, true);
+            $blacklist = json_decode($subsite->PageTypeBlacklist ?? '', true);
             if ($blacklist === false) {
-                $blacklist = explode(',', $subsite->PageTypeBlacklist);
+                $blacklist = explode(',', $subsite->PageTypeBlacklist ?? '');
             }
 
             if (in_array(get_class($this->owner), (array) $blacklist)) {

src/Forms/WildcardDomainField.php

@@ -36,7 +36,7 @@ class WildcardDomainField extends TextField
      */
     public function checkHostname($hostname)
     {
-        return (bool)preg_match('/^([a-z0-9\*]+[\-\.\:])*([a-z0-9\*]+)$/', $hostname);
+        return (bool)preg_match('/^([a-z0-9\*]+[\-\.\:])*([a-z0-9\*]+)$/', $hostname ?? '');
     }
 
     public function Type()

src/Middleware/InitStateMiddleware.php

@@ -69,9 +69,9 @@ class InitStateMiddleware implements HTTPMiddleware
     {
         $adminPaths = static::config()->get('admin_url_paths');
         $adminPaths[] = AdminRootController::admin_url();
-        $currentPath = rtrim($request->getURL(), '/') . '/';
+        $currentPath = rtrim($request->getURL() ?? '', '/') . '/';
         foreach ($adminPaths as $adminPath) {
-            if (substr($currentPath, 0, strlen($adminPath)) === $adminPath) {
+            if (substr($currentPath ?? '', 0, strlen($adminPath ?? '')) === $adminPath) {
                 return true;
             }
         }

src/Model/Subsite.php

@@ -259,14 +259,14 @@ class Subsite extends DataObject
         }
 
         // Remove ports, we aren't concerned with them in terms of detecting subsites via domains
-        $hostParts = explode(':', $host, 2);
+        $hostParts = explode(':', $host ?? '', 2);
         $host = reset($hostParts);
 
         $matchingDomains = null;
         $cacheKey = null;
         if ($host) {
             if (!static::config()->get('strict_subdomain_matching')) {
-                $host = preg_replace('/^www\./', '', $host);
+                $host = preg_replace('/^www\./', '', $host ?? '');
             }
 
             $currentUserId = Security::getCurrentUser() ? Security::getCurrentUser()->ID : 0;
@@ -301,9 +301,9 @@ class Subsite extends DataObject
         }
 
         if ($matchingDomains && $matchingDomains->count()) {
-            $subsiteIDs = array_unique($matchingDomains->column('SubsiteID'));
+            $subsiteIDs = array_unique($matchingDomains->column('SubsiteID') ?? []);
-            $subsiteDomains = array_unique($matchingDomains->column('Domain'));
+            $subsiteDomains = array_unique($matchingDomains->column('Domain') ?? []);
-            if (sizeof($subsiteIDs) > 1) {
+            if (sizeof($subsiteIDs ?? []) > 1) {
                 throw new UnexpectedValueException(sprintf(
                     "Multiple subsites match on '%s': %s",
                     $host,
@@ -577,7 +577,7 @@ class Subsite extends DataObject
                     foreach ($domains as $domain) {
                         $domainStr = $domain->Domain;
                         if (!static::config()->get('strict_subdomain_matching')) {
-                            $domainStr = preg_replace('/^www\./', '', $domainStr);
+                            $domainStr = preg_replace('/^www\./', '', $domainStr ?? '');
                         }
                         $hostmap[$domainStr] = $subsite->domain();
                     }
@@ -592,8 +592,8 @@ class Subsite extends DataObject
         $data .= "// Generated by Subsite::writeHostMap() on " . date('d/M/y') . "\n";
         $data .= '$subsiteHostmap = ' . var_export($hostmap, true) . ';';
 
-        if (is_writable(dirname($file)) || is_writable($file)) {
+        if (is_writable(dirname($file ?? '')) || is_writable($file ?? '')) {
-            file_put_contents($file, $data);
+            file_put_contents($file ?? '', $data);
         }
     }
 
@@ -624,7 +624,7 @@ class Subsite extends DataObject
             return false;
         }
 
-        if (!in_array('ADMIN', $permissionCodes)) {
+        if (!in_array('ADMIN', $permissionCodes ?? [])) {
             $permissionCodes[] = 'ADMIN';
         }
 
@@ -799,7 +799,7 @@ class Subsite extends DataObject
                 if ($theme[0] == '.') {
                     continue;
                 }
-                $theme = strtok($theme, '_');
+                $theme = strtok($theme ?? '', '_');
                 $themes[$theme] = $theme;
             }
             ksort($themes);
@@ -989,7 +989,7 @@ JS;
          * when a page, etc, is duplicated
          */
         $stack = [[0, 0]];
-        while (count($stack) > 0) {
+        while (count($stack ?? []) > 0) {
             list($sourceParentID, $destParentID) = array_pop($stack);
             $children = Versioned::get_by_stage('Page', 'Live', "\"ParentID\" = $sourceParentID", '');
 

src/Model/SubsiteDomain.php

@@ -190,14 +190,14 @@ class SubsiteDomain extends DataObject
 
         // If there are wildcards in the primary domain (not recommended), make some
         // educated guesses about what to replace them with:
-        $domain = preg_replace('/\.\*$/', ".{$currentHost}", $this->Domain);
+        $domain = preg_replace('/\.\*$/', ".{$currentHost}", $this->Domain ?? '');
 
         // Default to "subsite." prefix for first wildcard
         // TODO Whats the significance of "subsite" in this context?!
-        $domain = preg_replace('/^\*\./', "subsite.", $domain);
+        $domain = preg_replace('/^\*\./', "subsite.", $domain ?? '');
 
         // *Only* removes "intermediate" subdomains, so 'subdomain.www.domain.com' becomes 'subdomain.domain.com'
-        $domain = str_replace('.www.', '.', $domain);
+        $domain = str_replace('.www.', '.', $domain ?? '');
 
         return $domain;
     }

src/Pages/SubsitesVirtualPage.php

@@ -174,7 +174,7 @@ class SubsitesVirtualPage extends VirtualPage
         }
 
         foreach (self::$db as $field => $type) {
-            if (in_array($field, $fields)) {
+            if (in_array($field, $fields ?? [])) {
                 unset($fields[array_search($field, $fields)]);
             }
         }

src/Reports/SubsiteReportWrapper.php

@@ -27,10 +27,10 @@ class SubsiteReportWrapper extends ReportWrapper
             _t(__CLASS__ . '.ReportDropdown', 'Sites'),
             $options
         );
-        $subsiteField->setValue(array_keys($options));
+        $subsiteField->setValue(array_keys($options ?? []));
 
         // We don't need to make the field editable if only one subsite is available
-        if (sizeof($options) <= 1) {
+        if (sizeof($options ?? []) <= 1) {
             $subsiteField = $subsiteField->performReadonlyTransformation();
         }
 
@@ -70,7 +70,7 @@ class SubsiteReportWrapper extends ReportWrapper
         } else {
             $subsites = Subsite::accessible_sites('CMS_ACCESS_CMSMain');
             $options = $subsites->toDropdownMap('ID', 'Title');
-            Subsite::$force_subsite = join(',', array_keys($options));
+            Subsite::$force_subsite = join(',', array_keys($options ?? []));
         }
     }
 

src/Service/ThemeResolver.php

@@ -43,7 +43,7 @@ class ThemeResolver
      */
     public function getThemeList(Subsite $site)
     {
-        $themes = array_values(SSViewer::get_themes());
+        $themes = array_values(SSViewer::get_themes() ?? []);
         $siteTheme = $site->Theme;
 
         if (!$siteTheme) {
@@ -56,18 +56,18 @@ class ThemeResolver
         }
 
         // Ensure themes don't cascade "up" the list
-        $index = array_search($siteTheme, $themes);
+        $index = array_search($siteTheme, $themes ?? []);
 
         if ($index > 0) {
             // 4.0 didn't have support for themes in the public webroot
             $constant = SSViewer::class . '::PUBLIC_THEME';
-            $publicConstantDefined = defined($constant);
+            $publicConstantDefined = defined($constant ?? '');
 
             // Check if the default is public themes
             $publicDefault = $publicConstantDefined && $themes[0] === SSViewer::PUBLIC_THEME;
 
             // Take only those that appear after theme chosen (non-inclusive)
-            $themes = array_slice($themes, $index + 1);
+            $themes = array_slice($themes ?? [], $index + 1);
 
             // Add back in public
             if ($publicDefault) {
@@ -94,6 +94,6 @@ class ThemeResolver
             return null;
         }
 
-        return array_keys($config);
+        return array_keys($config ?? []);
     }
 }

src/Tasks/SubsiteCopyPagesTask.php

@@ -56,7 +56,7 @@ class SubsiteCopyPagesTask extends BuildTask
         // issues with having to check whether or not the new parents have been added to the site tree
         // when a page, etc, is duplicated
         $stack = [[0, 0]];
-        while (count($stack) > 0) {
+        while (count($stack ?? []) > 0) {
             list($sourceParentID, $destParentID) = array_pop($stack);
 
             $children = Versioned::get_by_stage(SiteTree::class, 'Live', "\"ParentID\" = $sourceParentID", '');

tests/php/Extensions/FolderFormFactoryExtensionTest.php

@@ -24,8 +24,8 @@ class FolderFormFactoryExtensionTest extends SapphireTest
             'Record' => $folder
         ]);
 
-        $source = array_values($folderForm->Fields()->fieldByName('SubsiteID')->getSource());
+        $source = array_values($folderForm->Fields()->fieldByName('SubsiteID')->getSource() ?? []);
-        $result = array_values($source);
+        $result = array_values($source ?? []);
 
         $this->assertContains('Main site', $result);
         $this->assertContains('Subsite A', $result);

tests/php/SiteTreeSubsitesTest.php

@@ -274,7 +274,7 @@ class SiteTreeSubsitesTest extends BaseSubsiteTest
 
         Subsite::changeSubsite($s1);
         $cmsmain = CMSMain::create();
-        $hints = json_decode($cmsmain->SiteTreeHints(), true);
+        $hints = json_decode($cmsmain->SiteTreeHints() ?? '', true);
         $classes = $hints['Root']['disallowedChildren'];
         $this->assertContains(ErrorPage::class, $classes);
         $this->assertContains(TestClassA::class, $classes);
@@ -285,7 +285,7 @@ class SiteTreeSubsitesTest extends BaseSubsiteTest
         if ($cmsmain->hasMethod('getHintsCache')) {
             $cmsmain->getHintsCache()->clear();
         }
-        $hints = json_decode($cmsmain->SiteTreeHints(), true);
+        $hints = json_decode($cmsmain->SiteTreeHints() ?? '', true);
 
         $classes = $hints['Root']['disallowedChildren'];
         $this->assertNotContains(ErrorPage::class, $classes);

tests/php/SubsiteAdminTest.php

@@ -33,10 +33,10 @@ class SubsiteAdminTest extends FunctionalTest
             ."SilverStripe-Subsites-Model-Subsite/item/$subsite1ID/edit"
         );
         $this->assertTrue(
-            strpos($response->getBody(), 'id="Form_ItemEditForm_ID"') !== false,
+            strpos($response->getBody() ?? '', 'id="Form_ItemEditForm_ID"') !== false,
             'Testing Form_ItemEditForm_ID exists'
         );
-        $this->assertTrue(strpos($response->getBody(), '<head') !== false, 'Testing <head> exists');
+        $this->assertTrue(strpos($response->getBody() ?? '', '<head') !== false, 'Testing <head> exists');
     }
 
     /**

tests/php/SubsiteTest.php

@@ -407,7 +407,7 @@ class SubsiteTest extends BaseSubsiteTest
             'Test Non-SSL',
             'Test SSL',
             'Test Vagrant VM on port 8080'
-        ], array_values($adminSiteTitles));
+        ], array_values($adminSiteTitles ?? []));
 
         $member2Sites = Subsite::accessible_sites(
             'CMS_ACCESS_CMSMain',

tests/php/SubsitesVirtualPageTest.php

@@ -35,8 +35,8 @@ class SubsitesVirtualPageTest extends BaseSubsiteTest
         $page = $this->objFromFixture(SiteTree::class, 'page1');
         $fromPath = __DIR__ . '/testscript-test-file.pdf';
         $destPath = TestAssetStore::getLocalPath($file);
-        Filesystem::makeFolder(dirname($destPath));
+        Filesystem::makeFolder(dirname($destPath ?? ''));
-        copy($fromPath, $destPath);
+        copy($fromPath ?? '', $destPath ?? '');
 
         // Hack in site link tracking after the fact
         $page->Content = '<p><img src="' . $file->getURL() . '" data-fileid="' . $file->ID . '" /></p>';