MC-33066: Add PHP 7.4 to composer.json files

- PHP 7.4 compatibility fixes

Author: xmav

app/code/Magento/SalesRule/Test/Unit/Model/ResourceModel/Report/CollectionTest.php

@@ -163,10 +163,10 @@ public function testApplyRulesFilterWithRulesList()
 
         $this->selectMock->expects($this->at(3))
             ->method('where')
-            ->with($this->equalTo(implode([
+            ->with($this->equalTo(implode(' OR ', [
                 'test_1',
                 'test_2',
-            ], ' OR ')));
+            ])));
 
         $ruleMock = $this->getRuleMock();
         $ruleMock->expects($this->once())

app/code/Magento/Wishlist/Model/LocaleQuantityProcessor.php

@@ -43,7 +43,7 @@ public function __construct(
     public function process($qty)
     {
         $this->localFilter->setOptions(['locale' => $this->localeResolver->getLocale()]);
-        $qty = $this->localFilter->filter((double)$qty);
+        $qty = $this->localFilter->filter($qty);
         if ($qty < 0) {
             $qty = null;
         }

lib/internal/Magento/Framework/App/AreaList.php

@@ -72,7 +72,7 @@ public function getCodeByFrontName($frontName)
                 $resolver = $this->_resolverFactory->create($areaInfo['frontNameResolver']);
                 $areaInfo['frontName'] = $resolver->getFrontName(true);
             }
-            if ($areaInfo['frontName'] == $frontName) {
+            if (isset($areaInfo['frontName']) && $areaInfo['frontName'] == $frontName) {
                 return $areaCode;
             }
         }

lib/internal/Magento/Framework/DB/Sql/UnionExpression.php

@@ -52,7 +52,7 @@ public function __toString()
                 $parts[] = $part;
             }
         }
-        $sql = implode($parts, $this->type);
+        $sql = implode($this->type, $parts);
         if ($this->pattern) {
             return sprintf($this->pattern, $sql);
         }

lib/internal/Magento/Framework/MessageQueue/BatchConsumer.php

@@ -151,9 +151,9 @@ private function runDaemonMode(QueueInterface $queue, MergerInterface $merger)
      */
     private function run(QueueInterface $queue, MergerInterface $merger, $maxNumberOfMessages)
     {
-        $count = $maxNumberOfMessages
+        $count = ($maxNumberOfMessages
             ? $maxNumberOfMessages
-            : $this->configuration->getMaxMessages() ?: 1;
+            : $this->configuration->getMaxMessages()) ?: 1;
         $transactionCallback = $this->getTransactionCallback($queue, $merger);
 
         if ($this->batchSize) {

lib/internal/Magento/Framework/Webapi/Rest/Response/Renderer/Xml.php

@@ -88,7 +88,7 @@ protected function _formatData($data, $isRoot = false)
         } else {
             $data = (array)$data;
         }
-        $isAssoc = !preg_match('/^\d+$/', implode(array_keys($data), ''));
+        $isAssoc = !preg_match('/^\d+$/', implode('', array_keys($data)));
 
         $formattedData = [];
         foreach ($data as $key => $value) {