diff --git a/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache b/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache
index 1c3288d813b..4f6da923a6a 100644
--- a/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache
+++ b/modules/openapi-generator/src/main/resources/php-symfony/Controller.mustache
@@ -180,34 +180,56 @@ class Controller extends AbstractController
      */
     protected function getOutputFormat(string $accept, array $produced): ?string
     {
-        // Figure out what the client accepts
-        $accept = preg_split("/[\s,]+/", $accept);
+        // First get the list of formats accepted by the client by weight.
+        // eg: text/html,*/*; q=0.7, text/*;q=0.8,text/plain;format=fixed;q=0.6 is turned to
+        // [
+        //   text/html  => 1, // because when no weight is present then the default value is 1. See https://httpwg.org/specs/rfc9110.html#quality.values .
+        //   */*        => 0.7,
+        //   text/*     => 0.8,
+        //   text/plain => 0.6,
+        // ]
+        // So we can subsequently order that list by descending weight (because 1 is the most prefered value, 0.001 is the least preferred)
+        $weightedFormats = array();
+        foreach (explode(",", str_replace(' ', '', $accept)) as $accept) {
+            $exploded = explode(';', $accept);
 
-        // Remove q-factor weighting. E.g. "application/json;q=0.8" becomes "application/json"
-        $accept = array_map(function ($type) {return explode(';', $type)[0];}, $accept);
-
-        if (in_array('*/*', $accept) || in_array('application/*', $accept)) {
-            // Prefer JSON if the client has no preference
-            if (in_array('application/json', $produced)) {
-                return 'application/json';
+            // If no weight is present then the default value is 1 (see https://httpwg.org/specs/rfc9110.html#quality.values )
+            if (count($exploded) === 1) {
+                $weight = 1.0;
+            } else {
+                $lastItem = end($exploded);
+                if (str_starts_with($lastItem, "q=")) {
+                     $weight = (float) str_replace("q=", "", $lastItem);
+                } else {
+                     $weight = 1.0;
+                }
             }
-            if (in_array('application/xml', $produced)) {
-                return 'application/xml';
+            $weightedFormats[$exploded[0]] = $weight;
+        }
+        arsort($weightedFormats);
+
+        // Now return the first produced format that matches
+        foreach (array_keys($weightedFormats) as $acceptedFormat) {
+            $acceptedFormatParts = explode('/', $acceptedFormat);
+            if (count($acceptedFormatParts) != 2) {
+              // badly formatted header sent by the client. Let's continue (instead of crashing)
+              continue;
+            }
+            $acceptedFormatType = $acceptedFormatParts[0];
+            $acceptedFormatSubtype = $acceptedFormatParts[1];
+
+            foreach ($produced as $producedFormat) {
+                if ($acceptedFormat === $producedFormat) {
+                  return $producedFormat;
+                }
+                if ($acceptedFormatSubtype === '*' && $acceptedFormatType === explode("/", $producedFormat)[0]) {
+                  return $producedFormat;
+                }
+                if ($acceptedFormat === "*/*") {
+                  return $producedFormat;
+                }
             }
         }
-
-        if (in_array('application/json', $accept) && in_array('application/json', $produced)) {
-            return 'application/json';
-        }
-
-        if (in_array('application/xml', $accept) && in_array('application/xml', $produced)) {
-            return 'application/xml';
-        }
-
-        if (in_array('*/*', $accept)) {
-            return $produced[0];
-        }
-
         // If we reach this point, we don't have a common ground between server and client
         return null;
     }
diff --git a/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php b/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
index 7d2600dbb6e..d232f8e1593 100644
--- a/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
+++ b/samples/server/petstore/php-symfony/SymfonyBundle-php/Controller/Controller.php
@@ -190,34 +190,56 @@ class Controller extends AbstractController
      */
     protected function getOutputFormat(string $accept, array $produced): ?string
     {
-        // Figure out what the client accepts
-        $accept = preg_split("/[\s,]+/", $accept);
+        // First get the list of formats accepted by the client by weight.
+        // eg: text/html,*/*; q=0.7, text/*;q=0.8,text/plain;format=fixed;q=0.6 is turned to
+        // [
+        //   text/html  => 1, // because when no weight is present then the default value is 1. See https://httpwg.org/specs/rfc9110.html#quality.values .
+        //   */*        => 0.7,
+        //   text/*     => 0.8,
+        //   text/plain => 0.6,
+        // ]
+        // So we can subsequently order that list by descending weight (because 1 is the most prefered value, 0.001 is the least preferred)
+        $weightedFormats = array();
+        foreach (explode(",", str_replace(' ', '', $accept)) as $accept) {
+            $exploded = explode(';', $accept);
 
-        // Remove q-factor weighting. E.g. "application/json;q=0.8" becomes "application/json"
-        $accept = array_map(function ($type) {return explode(';', $type)[0];}, $accept);
-
-        if (in_array('*/*', $accept) || in_array('application/*', $accept)) {
-            // Prefer JSON if the client has no preference
-            if (in_array('application/json', $produced)) {
-                return 'application/json';
+            // If no weight is present then the default value is 1 (see https://httpwg.org/specs/rfc9110.html#quality.values )
+            if (count($exploded) === 1) {
+                $weight = 1.0;
+            } else {
+                $lastItem = end($exploded);
+                if (str_starts_with($lastItem, "q=")) {
+                     $weight = (float) str_replace("q=", "", $lastItem);
+                } else {
+                     $weight = 1.0;
+                }
             }
-            if (in_array('application/xml', $produced)) {
-                return 'application/xml';
+            $weightedFormats[$exploded[0]] = $weight;
+        }
+        arsort($weightedFormats);
+
+        // Now return the first produced format that matches
+        foreach (array_keys($weightedFormats) as $acceptedFormat) {
+            $acceptedFormatParts = explode('/', $acceptedFormat);
+            if (count($acceptedFormatParts) != 2) {
+              // badly formatted header sent by the client. Let's continue (instead of crashing)
+              continue;
+            }
+            $acceptedFormatType = $acceptedFormatParts[0];
+            $acceptedFormatSubtype = $acceptedFormatParts[1];
+
+            foreach ($produced as $producedFormat) {
+                if ($acceptedFormat === $producedFormat) {
+                  return $producedFormat;
+                }
+                if ($acceptedFormatSubtype === '*' && $acceptedFormatType === explode("/", $producedFormat)[0]) {
+                  return $producedFormat;
+                }
+                if ($acceptedFormat === "*/*") {
+                  return $producedFormat;
+                }
             }
         }
-
-        if (in_array('application/json', $accept) && in_array('application/json', $produced)) {
-            return 'application/json';
-        }
-
-        if (in_array('application/xml', $accept) && in_array('application/xml', $produced)) {
-            return 'application/xml';
-        }
-
-        if (in_array('*/*', $accept)) {
-            return $produced[0];
-        }
-
         // If we reach this point, we don't have a common ground between server and client
         return null;
     }