diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index 02ec99d757..ebcd9e49e0 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -2689,7 +2689,7 @@ parameters:
 			path: src/Controllers/Export/ExportController.php
 
 		-
-			message: '#^Only booleans are allowed in an if condition, mixed given\.$#'
+			message: '#^Only booleans are allowed in an if condition, string given\.$#'
 			identifier: if.condNotBoolean
 			count: 1
 			path: src/Controllers/Export/ExportController.php
@@ -2712,24 +2712,6 @@ parameters:
 			count: 1
 			path: src/Controllers/Export/ExportController.php
 
-		-
-			message: '#^Parameter \#2 \$compression of method PhpMyAdmin\\Export\\Export\:\:compress\(\) expects string, mixed given\.$#'
-			identifier: argument.type
-			count: 2
-			path: src/Controllers/Export/ExportController.php
-
-		-
-			message: '#^Parameter \#2 \$compression of method PhpMyAdmin\\Export\\Export\:\:getFinalFilename\(\) expects string, mixed given\.$#'
-			identifier: argument.type
-			count: 2
-			path: src/Controllers/Export/ExportController.php
-
-		-
-			message: '#^Parameter \#2 \$compression of method PhpMyAdmin\\Export\\Export\:\:getMimeType\(\) expects string, mixed given\.$#'
-			identifier: argument.type
-			count: 1
-			path: src/Controllers/Export/ExportController.php
-
 		-
 			message: '#^Parameter \#3 \$saveFilename of method PhpMyAdmin\\Export\\Export\:\:closeFile\(\) expects string, mixed given\.$#'
 			identifier: argument.type
@@ -2754,6 +2736,12 @@ parameters:
 			count: 2
 			path: src/Controllers/Export/ExportController.php
 
+		-
+			message: '#^Static property PhpMyAdmin\\Export\\Export\:\:\$compression \(''''\|''gzip''\|''none''\|''zip''\) does not accept string\.$#'
+			identifier: assign.propertyType
+			count: 1
+			path: src/Controllers/Export/ExportController.php
+
 		-
 			message: '''
 				#^Call to deprecated method getInstance\(\) of class PhpMyAdmin\\Config\:
diff --git a/psalm-baseline.xml b/psalm-baseline.xml
index 34efc7295e..f8df632996 100644
--- a/psalm-baseline.xml
+++ b/psalm-baseline.xml
@@ -1403,7 +1403,6 @@
       <code><![CDATA[$_SESSION['tmpval']['aliases']]]></code>
     </MixedArrayAssignment>
     <MixedAssignment>
-      <code><![CDATA[$GLOBALS['compression']]]></code>
       <code><![CDATA[$GLOBALS['knjenc']]]></code>
       <code><![CDATA[$GLOBALS['maxsize']]]></code>
       <code><![CDATA[$GLOBALS['save_filename']]]></code>
@@ -1429,15 +1428,18 @@
     <PossiblyInvalidPropertyAssignmentValue>
       <code><![CDATA[$this->export->compress(
                     $this->export->dumpBuffer,
-                    $GLOBALS['compression'],
+                    Export::$compression,
                     $filename,
                 )]]></code>
       <code><![CDATA[$this->export->compress(
                     $this->export->dumpBufferObjects,
-                    $GLOBALS['compression'],
+                    Export::$compression,
                     $filename,
                 )]]></code>
     </PossiblyInvalidPropertyAssignmentValue>
+    <PropertyTypeCoercion>
+      <code><![CDATA[$request->getParsedBodyParamAsString('compression')]]></code>
+    </PropertyTypeCoercion>
     <RiskyTruthyFalsyComparison>
       <code><![CDATA[$asSeparateFiles]]></code>
       <code><![CDATA[$onServerParam]]></code>
diff --git a/psalm.xml b/psalm.xml
index ed13eb758f..ee8694eea6 100644
--- a/psalm.xml
+++ b/psalm.xml
@@ -39,7 +39,6 @@
 
     <globals>
         <var name="GLOBALS" type="array{
-            compression: 'none'|'zip'|'gzip',
             file_handle: resource|null,
             from_cookie: bool,
             knjenc: string,
diff --git a/src/Controllers/Export/ExportController.php b/src/Controllers/Export/ExportController.php
index 3f67be11b6..18ce79b187 100644
--- a/src/Controllers/Export/ExportController.php
+++ b/src/Controllers/Export/ExportController.php
@@ -49,7 +49,6 @@ final class ExportController implements InvocableController
 
     public function __invoke(ServerRequest $request): Response
     {
-        $GLOBALS['compression'] ??= null;
         $GLOBALS['file_handle'] ??= null;
         $GLOBALS['save_filename'] ??= null;
         $GLOBALS['table_select'] ??= null;
@@ -83,6 +82,10 @@ final class ExportController implements InvocableController
             Current::$charset = $request->getParsedBodyParamAsString('charset');
         }
 
+        if ($request->hasBodyParam('compression')) {
+            Export::$compression = $request->getParsedBodyParamAsString('compression');
+        }
+
         $this->setGlobalsFromRequest($postParams);
 
         // sanitize this parameter which will be used below in a file inclusion
@@ -122,7 +125,7 @@ final class ExportController implements InvocableController
         /**
          * init and variable checking
          */
-        $GLOBALS['compression'] = '';
+        Export::$compression = '';
         Export::$saveOnServer = false;
         Export::$bufferNeeded = false;
         $GLOBALS['save_filename'] = '';
@@ -142,7 +145,7 @@ final class ExportController implements InvocableController
             }
 
             if (in_array($compressionParam, $compressionMethods, true)) {
-                $GLOBALS['compression'] = $compressionParam;
+                Export::$compression = $compressionParam;
                 Export::$bufferNeeded = true;
             }
 
@@ -214,8 +217,7 @@ final class ExportController implements InvocableController
             && isset(Current::$charset) && Current::$charset !== 'utf-8';
 
         // Use on the fly compression?
-        $GLOBALS['onfly_compression'] = $config->settings['CompressOnFly']
-            && $GLOBALS['compression'] === 'gzip';
+        $GLOBALS['onfly_compression'] = $config->settings['CompressOnFly'] && Export::$compression === 'gzip';
         if ($GLOBALS['onfly_compression']) {
             $GLOBALS['memory_limit'] = $this->export->getMemoryLimit();
         }
@@ -231,16 +233,16 @@ final class ExportController implements InvocableController
 
             $filename = $this->export->getFinalFilename(
                 $exportPlugin,
-                $GLOBALS['compression'],
+                Export::$compression,
                 Sanitize::sanitizeFilename(Util::expandUserString($filenameTemplate), true),
             );
 
-            $mimeType = $this->export->getMimeType($exportPlugin, $GLOBALS['compression']);
+            $mimeType = $this->export->getMimeType($exportPlugin, Export::$compression);
         }
 
         // For raw query export, filename will be export.extension
         if ($exportType === ExportType::Raw) {
-            $filename = $this->export->getFinalFilename($exportPlugin, $GLOBALS['compression'], 'export');
+            $filename = $this->export->getFinalFilename($exportPlugin, Export::$compression, 'export');
         }
 
         // Open file on server if needed
@@ -422,17 +424,17 @@ final class ExportController implements InvocableController
         }
 
         // Compression needed?
-        if ($GLOBALS['compression']) {
+        if (Export::$compression) {
             if ($separateFiles !== '') {
                 $this->export->dumpBuffer = $this->export->compress(
                     $this->export->dumpBufferObjects,
-                    $GLOBALS['compression'],
+                    Export::$compression,
                     $filename,
                 );
             } else {
                 $this->export->dumpBuffer = $this->export->compress(
                     $this->export->dumpBuffer,
-                    $GLOBALS['compression'],
+                    Export::$compression,
                     $filename,
                 );
             }
@@ -474,10 +476,6 @@ final class ExportController implements InvocableController
             $GLOBALS['maxsize'] = $postParams['maxsize'];
         }
 
-        if (isset($postParams['compression'])) {
-            $GLOBALS['compression'] = $postParams['compression'];
-        }
-
         if (isset($postParams['knjenc'])) {
             $GLOBALS['knjenc'] = $postParams['knjenc'];
         }
diff --git a/src/Export/Export.php b/src/Export/Export.php
index 268dcb68fc..d5093f560c 100644
--- a/src/Export/Export.php
+++ b/src/Export/Export.php
@@ -81,6 +81,9 @@ class Export
     public static bool $bufferNeeded = false;
     public static bool $singleTable = false;
 
+    /** @var ''|'none'|'zip'|'gzip' */
+    public static string $compression = '';
+
     public function __construct(private DatabaseInterface $dbi)
     {
     }
@@ -161,7 +164,7 @@ class Export
                         );
                     }
 
-                    if ($GLOBALS['compression'] === 'gzip' && $this->gzencodeNeeded()) {
+                    if (self::$compression === 'gzip' && $this->gzencodeNeeded()) {
                         // as a gzipped file
                         // without the optional parameter level because it bugs
                         $this->dumpBuffer = (string) gzencode($this->dumpBuffer);