fix(php-symfony): enum-ref query params use short types with correct imports

* Normalize dotted / flattened enum-ref dataType and resync operation imports;
  rebuild OperationsMap imports after postProcess for api.mustache use lines
* Unify api.mustache @param and signatures on vendorExtensions.x-parameter-type
  (short name + optional|null) for isEnumRef
* Add OAS 3.1 petstore fixture under 3_1/php-symfony and extend
  PhpSymfonyServerCodegenTest (PHPDoc + php -l)
* Document normalizeEnumRefParameterDataType / sync / refresh import pipeline

Author: JerrySLau

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/PhpSymfonyServerCodegen.java

@@ -386,9 +386,11 @@ public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List<Mo
         List<CodegenOperation> operationList = operations.getOperation();
 
         for (CodegenOperation op : operationList) {
-            // Loop through all input parameters to determine, whether we have to import something to
-            // make the input type available.
+            // Per-parameter: enum $ref fixes (normalizeEnumRefParameterDataType → syncEnumRefOperationImports),
+            // then x-parameter-type / x-comment-type. Aggregated Api imports are rebuilt once afterward
+            // (refreshAggregatedImportsForOperations).
             for (CodegenParameter param : op.allParams) {
+                normalizeEnumRefParameterDataType(op, param);
                 // Determine if the parameter type is supported as a type hint and make it available
                 // to the templating engine
                 String typeHint = getTypeHint(param.dataType, false);
@@ -405,6 +407,16 @@ public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List<Mo
                 if (param.isContainer) {
                     param.vendorExtensions.put("x-comment-type", prependSlashToDataTypeOnlyIfNecessary(param.dataType) + "[]");
                 }
+
+                // Enum $ref parameters: dataType is the short PHP model class name only; getTypeHint(dataType) is empty.
+                // Build FQCN body so getTypeHint matches isModelClass and yields the same short name as file-level imports.
+                if (param.isEnumRef && StringUtils.isNotEmpty(param.dataType)) {
+                    String fqcnBody = modelPackage() + "\\" + param.dataType;
+                    String enumTypeHint = getTypeHint(fqcnBody, false);
+                    if (StringUtils.isNotEmpty(enumTypeHint)) {
+                        param.vendorExtensions.put("x-parameter-type", enumTypeHint);
+                    }
+                }
             }
 
             // Create a variable to display the correct return type in comments for interfaces
@@ -441,9 +453,142 @@ public OperationsMap postProcessOperationsWithModels(OperationsMap objs, List<Mo
 
         operations.put("authMethods", authMethods);
 
+        refreshAggregatedImportsForOperations(objs);
+
         return objs;
     }
 
+    /**
+     * Normalizes {@link CodegenParameter#getDataType()} for enum-by-reference parameters only
+     * ({@code param.isEnumRef}).
+     * <p><b>Why:</b> Templates concatenate {@code modelPackage} + {@code dataType} for FQCN strings (e.g. validation /
+     * deserialization). The API interface uses short names plus {@code use} imports, so {@code dataType} must be the
+     * <em>short</em> PHP class name. Upstream parsing (OpenAPI 3.1 dotted keys, {@code components.parameters} {@code $ref},
+     * or flattening) can leave {@code dataType} as a bogus single token (no {@code \}), a full FQCN, or a leading
+     * {@code \}.
+     * <p><b>Execution (this method):</b>
+     * <ol>
+     *   <li>Exit if not enum ref or empty {@code dataType}.</li>
+     *   <li>Strip a leading {@code \} from the working copy.</li>
+     *   <li>If the copy contains {@code \}: if it starts with {@code modelPackage + "\\"}, keep the suffix as short name;
+     *       else if it looks like a model FQCN under another path, take {@link #extractSimpleName(String)}.</li>
+     *   <li>If there is no {@code \}: optionally strip a bogus {@code modelPackage} with all separators removed
+     *       (flat prefix) from the start, then {@link #toModelName(String)} so dotted logical names become the real
+     *       generated model class name.</li>
+     *   <li>Always finish with {@link #syncEnumRefOperationImports(CodegenOperation, CodegenParameter, String)} so
+     *       {@link CodegenOperation#imports} matches the normalized short name.</li>
+     * </ol>
+     * <p><b>Downstream in {@link #postProcessOperationsWithModels}:</b> after this call, {@link #getTypeHint(String, Boolean)}
+     * and {@code x-parameter-type} use {@code modelPackage + "\\" + dataType} for enum refs so the hint matches imports.
+     * <p><b>Aggregated imports:</b> {@link OperationsMap#setImports} is built before this hook; callers must invoke
+     * {@link #refreshAggregatedImportsForOperations(OperationsMap)} once all operations/parameters are processed.
+     */
+    private void normalizeEnumRefParameterDataType(CodegenOperation op, CodegenParameter param) {
+        if (!param.isEnumRef || StringUtils.isEmpty(param.dataType)) {
+            return;
+        }
+        String dt = param.dataType;
+        if (dt.startsWith("\\")) {
+            dt = dt.substring(1);
+        }
+        final String mp = modelPackage();
+        if (dt.contains("\\")) {
+            if (dt.startsWith(mp + "\\")) {
+                param.dataType = dt.substring(mp.length() + 1);
+            } else if (isModelClass(dt)) {
+                param.dataType = extractSimpleName(dt);
+            }
+        } else {
+            // No backslashes: flattened invoker+model+class token, dotted logical name, or already-short class name
+            String flatPrefix = mp.replace("\\", "");
+            if (StringUtils.isNotEmpty(flatPrefix)
+                    && dt.startsWith(flatPrefix)
+                    && dt.length() > flatPrefix.length()) {
+                dt = dt.substring(flatPrefix.length());
+            }
+            param.dataType = toModelName(dt);
+        }
+        syncEnumRefOperationImports(op, param, mp);
+    }
+
+    /**
+     * Repairs {@link CodegenOperation#imports} for one enum-ref parameter after {@link #normalizeEnumRefParameterDataType}.
+     * <p><b>Step 1 — remove bogus entries:</b> {@code DefaultGenerator} may add a single token that is the
+     * {@code modelPackage} string with all {@code \} removed, prefixed to the class name (still without {@code \}).
+     * Such values are not valid PHP imports and break {@code api.mustache} {@code use} lines; drop any import string
+     * that has no backslash, starts with that flat prefix, and is longer than the prefix alone.
+     * <p><b>Step 2 — add the short model name:</b> if {@code param.dataType} is non-empty and {@link #needToImport(String)}
+     * is true, add it so the operation contributes the correct short classname to the union used for template imports.
+     */
+    private void syncEnumRefOperationImports(CodegenOperation op, CodegenParameter param, String modelPackage) {
+        if (op == null || op.imports == null || StringUtils.isEmpty(modelPackage)) {
+            return;
+        }
+        String flatPrefix = modelPackage.replace("\\", "");
+        if (StringUtils.isEmpty(flatPrefix)) {
+            return;
+        }
+        op.imports.removeIf(s ->
+                s != null
+                        && !s.contains("\\")
+                        && s.startsWith(flatPrefix)
+                        && s.length() > flatPrefix.length());
+        if (StringUtils.isNotEmpty(param.dataType) && needToImport(param.dataType)) {
+            op.imports.add(param.dataType);
+        }
+    }
+
+    /**
+     * Recomputes the bundle-level import list exposed to Mustache ({@link OperationsMap#setImports},
+     * {@code hasImport}) from the per-operation {@link CodegenOperation#imports} sets.
+     * <p><b>When:</b> call once at the end of {@link #postProcessOperationsWithModels}, after every
+     * {@link CodegenOperation} has had its parameters processed (including {@link #normalizeEnumRefParameterDataType} /
+     * {@link #syncEnumRefOperationImports}).
+     * <p><b>Execution:</b>
+     * <ol>
+     *   <li>Union all strings in {@code op.imports} across operations into a sorted {@link TreeSet} (stable, de-duplicated).</li>
+     *   <li>For each symbol, resolve {@link #importMapping()} or {@link #toModelImportMap(String)} into
+     *       {@code fullQualifiedImport → shortClassName} pairs (same shape as {@code DefaultGenerator#processOperations}).</li>
+     *   <li>Build {@code {import, classname}} rows sorted by {@code classname} for the template partial that emits
+     *       {@code use Full\\Qualified;}</li>
+     *   <li>Replace {@code operationsMap} imports and set {@code hasImport}.</li>
+     * </ol>
+     */
+    private void refreshAggregatedImportsForOperations(OperationsMap operationsMap) {
+        OperationMap operationMap = operationsMap.getOperations();
+        if (operationMap == null) {
+            return;
+        }
+        List<CodegenOperation> operationList = operationMap.getOperation();
+        if (operationList == null) {
+            return;
+        }
+        Set<String> allImports = new TreeSet<>();
+        for (CodegenOperation op : operationList) {
+            if (op.imports != null) {
+                allImports.addAll(op.imports);
+            }
+        }
+        Map<String, String> mapped = new LinkedHashMap<>();
+        for (String nextImport : allImports) {
+            String mapping = importMapping().get(nextImport);
+            if (mapping != null) {
+                mapped.put(mapping, nextImport);
+            } else {
+                mapped.putAll(toModelImportMap(nextImport));
+            }
+        }
+        Set<Map<String, String>> importObjects = new TreeSet<>(Comparator.comparing(o -> o.get("classname")));
+        for (Map.Entry<String, String> e : mapped.entrySet()) {
+            Map<String, String> row = new LinkedHashMap<>();
+            row.put("import", e.getKey());
+            row.put("classname", e.getValue());
+            importObjects.add(row);
+        }
+        operationsMap.setImports(new ArrayList<>(importObjects));
+        operationsMap.put("hasImport", !importObjects.isEmpty());
+    }
+
     private boolean isApplicationJsonOrApplicationXml(CodegenOperation op) {
        if (op.produces != null) {
            for(Map<String, String> produce : op.produces) {

modules/openapi-generator/src/main/resources/php-symfony/api.mustache

@@ -59,12 +59,7 @@ interface {{classname}}
      *
     {{/description}}
     {{#allParams}}
-    {{#isEnumRef}}
-     * @param  \{{modelPackage}}\{{dataType}}{{^required}}{{^defaultValue}}|null{{/defaultValue}}{{/required}} ${{paramName}}  {{description}} {{#required}}(required){{/required}}{{^required}}(optional{{#defaultValue}}, default to {{{.}}}{{/defaultValue}}){{/required}}{{#isDeprecated}} (deprecated){{/isDeprecated}}
-    {{/isEnumRef}}
-    {{^isEnumRef}}
      * @param  {{vendorExtensions.x-parameter-type}}{{^required}}{{^defaultValue}}|null{{/defaultValue}}{{/required}} ${{paramName}}  {{description}} {{#required}}(required){{/required}}{{^required}}(optional{{#defaultValue}}, default to {{{.}}}{{/defaultValue}}){{/required}}{{#isDeprecated}} (deprecated){{/isDeprecated}}
-    {{/isEnumRef}}
     {{/allParams}}
      * @param  int     &$responseCode    The HTTP Response Code
      * @param  array   $responseHeaders  Additional HTTP headers to return with the response ()
@@ -76,12 +71,7 @@ interface {{classname}}
      */
     public function {{operationId}}(
         {{#allParams}}
-        {{#isEnumRef}}
-        {{^required}}{{^defaultValue}}?{{/defaultValue}}{{/required}}\{{modelPackage}}\{{dataType}} ${{paramName}},
-        {{/isEnumRef}}
-        {{^isEnumRef}}
         {{^required}}{{^defaultValue}}?{{/defaultValue}}{{/required}}{{#vendorExtensions.x-parameter-type}}{{vendorExtensions.x-parameter-type}} {{/vendorExtensions.x-parameter-type}}${{paramName}},
-        {{/isEnumRef}}
         {{/allParams}}
         int &$responseCode,
         array &$responseHeaders

modules/openapi-generator/src/main/resources/php-symfony/api_controller.mustache

@@ -154,10 +154,10 @@ class {{controllerName}} extends Controller
             {{^isFile}}
             {{#isBodyParam}}
             $inputFormat = $request->getMimeType($request->getContentTypeFormat());
-            ${{paramName}} = $this->deserialize(${{paramName}}, '{{#isContainer}}{{#items}}array<{{dataType}}>{{/items}}{{/isContainer}}{{^isContainer}}{{#isEnumRef}}\{{modelPackage}}\{{dataType}}{{/isEnumRef}}{{^isEnumRef}}{{dataType}}{{/isEnumRef}}{{/isContainer}}', $inputFormat);
+            ${{paramName}} = $this->deserialize(${{paramName}}, '{{#isContainer}}{{#items}}array<{{dataType}}>{{/items}}{{/isContainer}}{{^isContainer}}{{#isEnumRef}}\{{{modelPackage}}}\{{{dataType}}}{{/isEnumRef}}{{^isEnumRef}}{{dataType}}{{/isEnumRef}}{{/isContainer}}', $inputFormat);
             {{/isBodyParam}}
             {{^isBodyParam}}
-            ${{paramName}} = $this->deserialize(${{paramName}}, '{{#isContainer}}array<{{collectionFormat}}{{^collectionFormat}}csv{{/collectionFormat}},{{dataType}}>{{/isContainer}}{{^isContainer}}{{#isEnumRef}}\{{modelPackage}}\{{dataType}}{{/isEnumRef}}{{^isEnumRef}}{{dataType}}{{/isEnumRef}}{{/isContainer}}', 'string');
+            ${{paramName}} = $this->deserialize(${{paramName}}, '{{#isContainer}}array<{{collectionFormat}}{{^collectionFormat}}csv{{/collectionFormat}},{{dataType}}>{{/isContainer}}{{^isContainer}}{{#isEnumRef}}\{{{modelPackage}}}\{{{dataType}}}{{/isEnumRef}}{{^isEnumRef}}{{dataType}}{{/isEnumRef}}{{/isContainer}}', 'string');
             {{/isBodyParam}}
             {{/isFile}}
             {{/allParams}}

modules/openapi-generator/src/main/resources/php-symfony/api_input_validation.mustache

@@ -39,7 +39,7 @@
     {{/isFile}}
     {{^isFile}}
     {{#isEnumRef}}
-        $asserts[] = new Assert\Type("\{{modelPackage}}\{{dataType}}");
+        $asserts[] = new Assert\Type('\{{{modelPackage}}}\{{{dataType}}}');
     {{/isEnumRef}}
     {{^isEnumRef}}
         $asserts[] = new Assert\Type('{{dataType}}');

modules/openapi-generator/src/test/java/org/openapitools/codegen/php/PhpSymfonyServerCodegenTest.java

@@ -25,13 +25,18 @@
 import org.openapitools.codegen.languages.AbstractPhpCodegen;
 import org.openapitools.codegen.languages.PhpSymfonyServerCodegen;
 import org.testng.Assert;
+import org.testng.SkipException;
 import org.testng.annotations.Test;
 
 import java.io.File;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
 import java.nio.file.Files;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.concurrent.TimeUnit;
+import java.util.regex.Pattern;
 
 
 public class PhpSymfonyServerCodegenTest {
@@ -173,4 +178,76 @@ public void testGeneratePingWithDifferentSourceDirectory() throws Exception {
 
         output.deleteOnExit();
     }
+
+    /**
+     * OpenAPI 3.1 + dotted schema keys + {@code components.parameters} {@code $ref}: enum-ref query
+     * parameters must use a short model class name in {@code DefaultApiInterface} (aligned with
+     * {@code use} imports), not a bogus flattened namespace token.
+     * <p>
+     * Also verifies PHPDoc {@code @param} uses the same short name (not {@code \\FQCN}) and, when
+     * {@code php} is on {@code PATH}, that {@code php -l} accepts the generated file (valid syntax).
+     */
+    @Test
+    public void testPetstoreDottedEnumRefQueryParameterUsesShortClassInApiInterface() throws Exception {
+        Map<String, Object> properties = new HashMap<>();
+        properties.put("invokerPackage", "Org\\OpenAPITools\\Petstore");
+
+        File output = Files.createTempDirectory("test").toFile();
+
+        final CodegenConfigurator configurator = new CodegenConfigurator()
+                .setGeneratorName("php-symfony")
+                .setAdditionalProperties(properties)
+                .setInputSpec("src/test/resources/3_1/php-symfony/petstore-dotted-enum-ref-query-param-component.yaml")
+                .setOutputDir(output.getAbsolutePath().replace("\\", "/"));
+
+        final ClientOptInput clientOptInput = configurator.toClientOptInput();
+        DefaultGenerator generator = new DefaultGenerator();
+        List<File> files = generator.opts(clientOptInput).generate();
+
+        File apiInterfaceFile = files.stream()
+                .filter(f -> "DefaultApiInterface.php".equals(f.getName()) && f.getPath().contains("Api" + File.separator))
+                .findFirst()
+                .orElseThrow(() -> new AssertionError("DefaultApiInterface.php not generated"));
+
+        String apiContent = Files.readString(apiInterfaceFile.toPath(), StandardCharsets.UTF_8);
+        Assert.assertFalse(
+                apiContent.contains("OrgOpenAPIToolsPetstoreModel"),
+                "Must not emit flattened invoker+model token in interface");
+        Assert.assertTrue(
+                apiContent.contains("use Org\\OpenAPITools\\Petstore\\Model\\PetModelPetStatus;"),
+                "Expected enum model import");
+        Assert.assertTrue(
+                apiContent.contains("?PetModelPetStatus $status"),
+                "Expected enum ref query param to use short class in type hint");
+        Assert.assertTrue(
+                Pattern.compile("@param\\s+PetModelPetStatus\\|null\\s+\\$status\\b").matcher(apiContent).find(),
+                "PHPDoc @param should use short PetModelPetStatus|null (consistent with use import)");
+        Assert.assertFalse(
+                apiContent.contains("?\\Org\\OpenAPITools\\Petstore\\Model\\PetModelPetStatus $status"),
+                "Signature must not use leading-backslash FQCN when a matching use import exists");
+        Assert.assertFalse(
+                apiContent.contains("@param  \\Org\\"),
+                "PHPDoc @param must not use leading-backslash FQCN for enum ref");
+
+        assertGeneratedPhpSyntaxValid(apiInterfaceFile);
+
+        output.deleteOnExit();
+    }
+
+    /**
+     * Runs {@code php -l} on the file. Skips if {@code php} is not available (optional toolchain).
+     */
+    private static void assertGeneratedPhpSyntaxValid(File phpFile) throws Exception {
+        ProcessBuilder pb = new ProcessBuilder("php", "-l", phpFile.getAbsolutePath());
+        pb.redirectErrorStream(true);
+        final Process p;
+        try {
+            p = pb.start();
+        } catch (IOException e) {
+            throw new SkipException("php not available on PATH, skipping syntax check: " + e.getMessage());
+        }
+        Assert.assertTrue(p.waitFor(30, TimeUnit.SECONDS), "php -l timed out");
+        String out = new String(p.getInputStream().readAllBytes(), StandardCharsets.UTF_8).trim();
+        Assert.assertEquals(p.exitValue(), 0, "php -l must accept generated interface: " + out);
+    }
 }

modules/openapi-generator/src/test/resources/3_1/php-symfony/petstore-dotted-enum-ref-query-param-component.yaml

@@ -0,0 +1,30 @@
+openapi: 3.1.0
+info:
+  title: php-symfony petstore dotted enum ref via components.parameters
+  version: '1.0'
+paths:
+  /pets:
+    get:
+      operationId: listPets
+      parameters:
+        - $ref: '#/components/parameters/Pet.HTTP.ListPetsRequest.status'
+      responses:
+        '200':
+          description: OK
+components:
+  parameters:
+    Pet.HTTP.ListPetsRequest.status:
+      name: status
+      in: query
+      required: false
+      schema:
+        $ref: '#/components/schemas/Pet.Model.PetStatus'
+        default: available
+      explode: false
+  schemas:
+    Pet.Model.PetStatus:
+      type: string
+      enum:
+        - available
+        - pending
+        - sold