diff --git a/config/set/code-quality/code-quality.yaml b/config/set/code-quality/code-quality.yaml
index 5558e91b450f..1f4d8d0c5201 100644
--- a/config/set/code-quality/code-quality.yaml
+++ b/config/set/code-quality/code-quality.yaml
@@ -46,3 +46,4 @@ services:
     Rector\CodeQuality\Rector\FuncCall\AddPregQuoteDelimiterRector: ~
     Rector\CodeQuality\Rector\FuncCall\ArrayMergeOfNonArraysToSimpleArrayRector: ~
     Rector\CodeQuality\Rector\FuncCall\IntvalToTypeCastRector: ~
+    Rector\CodeQuality\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector: ~
diff --git a/packages/CodeQuality/src/Rector/Foreach_/SimplifyForeachToCoalescingRector.php b/packages/CodeQuality/src/Rector/Foreach_/SimplifyForeachToCoalescingRector.php
index 9169f9e867bb..02b9e8d049af 100644
--- a/packages/CodeQuality/src/Rector/Foreach_/SimplifyForeachToCoalescingRector.php
+++ b/packages/CodeQuality/src/Rector/Foreach_/SimplifyForeachToCoalescingRector.php
@@ -21,6 +21,8 @@
 use Rector\ValueObject\PhpVersionFeature;
 
 /**
+ * @see https://3v4l.org/bfsdY
+ *
  * @see \Rector\CodeQuality\Tests\Rector\Foreach_\SimplifyForeachToCoalescingRector\SimplifyForeachToCoalescingRectorTest
  */
 final class SimplifyForeachToCoalescingRector extends AbstractRector
diff --git a/packages/CodeQuality/src/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector.php b/packages/CodeQuality/src/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector.php
new file mode 100644
index 000000000000..bf3b2d085df9
--- /dev/null
+++ b/packages/CodeQuality/src/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector.php
@@ -0,0 +1,105 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\CodeQuality\Rector\Ternary;
+
+use PhpParser\Node;
+use PhpParser\Node\Expr\ArrayDimFetch;
+use PhpParser\Node\Expr\BinaryOp\Coalesce;
+use PhpParser\Node\Expr\FuncCall;
+use PhpParser\Node\Expr\Ternary;
+use Rector\Rector\AbstractRector;
+use Rector\RectorDefinition\CodeSample;
+use Rector\RectorDefinition\RectorDefinition;
+
+/**
+ * @see https://3v4l.org/f7itn
+ *
+ * @see \Rector\CodeQuality\Tests\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector\ArrayKeyExistsTernaryThenValueToCoalescingRectorTest
+ */
+final class ArrayKeyExistsTernaryThenValueToCoalescingRector extends AbstractRector
+{
+    public function getDefinition(): RectorDefinition
+    {
+        return new RectorDefinition('Change array_key_exists() ternary to coalesing', [
+            new CodeSample(
+                <<<'PHP'
+class SomeClass
+{
+    public function run($values, $keyToMatch)
+    {
+        $result = array_key_exists($keyToMatch, $values) ? $values[$keyToMatch] : null;
+    }
+}
+PHP
+,
+                <<<'PHP'
+class SomeClass
+{
+    public function run($values, $keyToMatch)
+    {
+        $result = $values[$keyToMatch] ?? null;
+    }
+}
+PHP
+
+            ),
+        ]);
+    }
+
+    /**
+     * @return string[]
+     */
+    public function getNodeTypes(): array
+    {
+        return [Ternary::class];
+    }
+
+    /**
+     * @param Ternary $node
+     */
+    public function refactor(Node $node): ?Node
+    {
+        if (! $node->cond instanceof FuncCall) {
+            return null;
+        }
+
+        if (! $this->isName($node->cond, 'array_key_exists')) {
+            return null;
+        }
+
+        if (! $node->if instanceof ArrayDimFetch) {
+            return null;
+        }
+
+        if (! $this->areArrayKeysExistsArgsMatchingDimFetch($node->cond, $node->if)) {
+            return null;
+        }
+
+        return new Coalesce($node->if, $node->else);
+    }
+
+    /**
+     * Equals if:
+     *
+     * array_key_exists($key, $values);
+     * =
+     * $values[$key]
+     */
+    private function areArrayKeysExistsArgsMatchingDimFetch(FuncCall $funcCall, ArrayDimFetch $arrayDimFetch): bool
+    {
+        $keyExpr = $funcCall->args[0]->value;
+        $valuesExpr = $funcCall->args[1]->value;
+
+        if (! $this->areNodesEqual($arrayDimFetch->var, $valuesExpr)) {
+            return false;
+        }
+
+        if (! $this->areNodesEqual($arrayDimFetch->dim, $keyExpr)) {
+            return false;
+        }
+
+        return true;
+    }
+}
diff --git a/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/ArrayKeyExistsTernaryThenValueToCoalescingRectorTest.php b/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/ArrayKeyExistsTernaryThenValueToCoalescingRectorTest.php
new file mode 100644
index 000000000000..7fa4f421b4e0
--- /dev/null
+++ b/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/ArrayKeyExistsTernaryThenValueToCoalescingRectorTest.php
@@ -0,0 +1,30 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Rector\CodeQuality\Tests\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector;
+
+use Iterator;
+use Rector\CodeQuality\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector;
+use Rector\Testing\PHPUnit\AbstractRectorTestCase;
+
+final class ArrayKeyExistsTernaryThenValueToCoalescingRectorTest extends AbstractRectorTestCase
+{
+    /**
+     * @dataProvider provideDataForTest()
+     */
+    public function test(string $file): void
+    {
+        $this->doTestFile($file);
+    }
+
+    public function provideDataForTest(): Iterator
+    {
+        return $this->yieldFilesFromDirectory(__DIR__ . '/Fixture');
+    }
+
+    protected function getRectorClass(): string
+    {
+        return ArrayKeyExistsTernaryThenValueToCoalescingRector::class;
+    }
+}
diff --git a/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/Fixture/fixture.php.inc b/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/Fixture/fixture.php.inc
new file mode 100644
index 000000000000..4fd2a730451f
--- /dev/null
+++ b/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/Fixture/fixture.php.inc
@@ -0,0 +1,27 @@
+<?php
+
+namespace Rector\CodeQuality\Tests\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector\Fixture;
+
+class SomeClass
+{
+    public function run($values, $keyToMatch)
+    {
+        $result = array_key_exists($keyToMatch, $values) ? $values[$keyToMatch] : null;
+    }
+}
+
+?>
+-----
+<?php
+
+namespace Rector\CodeQuality\Tests\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector\Fixture;
+
+class SomeClass
+{
+    public function run($values, $keyToMatch)
+    {
+        $result = $values[$keyToMatch] ?? null;
+    }
+}
+
+?>
diff --git a/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/Fixture/skip_mismatch.php.inc b/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/Fixture/skip_mismatch.php.inc
new file mode 100644
index 000000000000..7f7812f8f18a
--- /dev/null
+++ b/packages/CodeQuality/tests/Rector/Ternary/ArrayKeyExistsTernaryThenValueToCoalescingRector/Fixture/skip_mismatch.php.inc
@@ -0,0 +1,11 @@
+<?php
+
+namespace Rector\CodeQuality\Tests\Rector\Ternary\ArrayKeyExistsTernaryThenValueToCoalescingRector\Fixture;
+
+class SkipMissMatch
+{
+    public function run($values, $keyToMatch)
+    {
+        $result = array_key_exists($keyToMatch, $values) ? $values[$keyToMatch2] : null;
+    }
+}