[PHP] Fix string length validation (#7953)

* Add a test case which reproduces the issue

swagger-api/swagger-codegen#7846

* Change `strlen` -> `mb_strlen` in order to count the length correctly

* Regenerate the samples

modules/swagger-codegen/src/main/resources/php/model_generic.mustache

@@ -205,13 +205,13 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}} {{/parentSchema}}{{^pa
         {{/isEnum}}
         {{#hasValidation}}
         {{#maxLength}}
-        if ({{^required}}!is_null($this->container['{{name}}']) && {{/required}}(strlen($this->container['{{name}}']) > {{maxLength}})) {
+        if ({{^required}}!is_null($this->container['{{name}}']) && {{/required}}(mb_strlen($this->container['{{name}}']) > {{maxLength}})) {
             $invalidProperties[] = "invalid value for '{{name}}', the character length must be smaller than or equal to {{{maxLength}}}.";
         }
 
         {{/maxLength}}
         {{#minLength}}
-        if ({{^required}}!is_null($this->container['{{name}}']) && {{/required}}(strlen($this->container['{{name}}']) < {{minLength}})) {
+        if ({{^required}}!is_null($this->container['{{name}}']) && {{/required}}(mb_strlen($this->container['{{name}}']) < {{minLength}})) {
             $invalidProperties[] = "invalid value for '{{name}}', the character length must be bigger than or equal to {{{minLength}}}.";
         }
 
@@ -281,12 +281,12 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}} {{/parentSchema}}{{^pa
         {{/isEnum}}
         {{#hasValidation}}
         {{#maxLength}}
-        if (strlen($this->container['{{name}}']) > {{maxLength}}) {
+        if (mb_strlen($this->container['{{name}}']) > {{maxLength}}) {
             return false;
         }
         {{/maxLength}}
         {{#minLength}}
-        if (strlen($this->container['{{name}}']) < {{minLength}}) {
+        if (mb_strlen($this->container['{{name}}']) < {{minLength}}) {
             return false;
         }
         {{/minLength}}
@@ -366,11 +366,11 @@ class {{classname}} {{#parentSchema}}extends {{{parent}}} {{/parentSchema}}{{^pa
         {{/isEnum}}
         {{#hasValidation}}
         {{#maxLength}}
-        if ({{^required}}!is_null(${{name}}) && {{/required}}(strlen(${{name}}) > {{maxLength}})) {
+        if ({{^required}}!is_null(${{name}}) && {{/required}}(mb_strlen(${{name}}) > {{maxLength}})) {
             throw new \InvalidArgumentException('invalid length for ${{name}} when calling {{classname}}.{{operationId}}, must be smaller than or equal to {{maxLength}}.');
         }{{/maxLength}}
         {{#minLength}}
-        if ({{^required}}!is_null(${{name}}) && {{/required}}(strlen(${{name}}) < {{minLength}})) {
+        if ({{^required}}!is_null(${{name}}) && {{/required}}(mb_strlen(${{name}}) < {{minLength}})) {
             throw new \InvalidArgumentException('invalid length for ${{name}} when calling {{classname}}.{{operationId}}, must be bigger than or equal to {{minLength}}.');
         }
         {{/minLength}}

samples/client/petstore-security-test/php/SwaggerClient-php/lib/ObjectSerializer.php

@@ -271,7 +271,7 @@ public static function deserialize($data, $class, $httpHeaders = null)
             // determine file name
             if (array_key_exists('Content-Disposition', $httpHeaders) &&
                 preg_match('/inline; filename=[\'"]?([^\'"\s]+)[\'"]?$/i', $httpHeaders['Content-Disposition'], $match)) {
-                $filename = Configuration::getDefaultConfiguration()->getTempFolderPath() . self::sanitizeFilename($match[1]);
+                $filename = Configuration::getDefaultConfiguration()->getTempFolderPath() . DIRECTORY_SEPARATOR . self::sanitizeFilename($match[1]);
             } else {
                 $filename = tempnam(Configuration::getDefaultConfiguration()->getTempFolderPath(), '');
             }

samples/client/petstore/php/SwaggerClient-php/README.md

@@ -80,6 +80,7 @@ All URIs are relative to *http://petstore.swagger.io:80/v2*
 Class | Method | HTTP request | Description
 ------------ | ------------- | ------------- | -------------
 *AnotherFakeApi* | [**testSpecialTags**](docs/Api/AnotherFakeApi.md#testspecialtags) | **PATCH** /another-fake/dummy | To test special tags
+*DefaultApi* | [**testBodyWithQueryParams**](docs/Api/DefaultApi.md#testbodywithqueryparams) | **PUT** /fake/body-with-query-params | 
 *FakeApi* | [**fakeOuterBooleanSerialize**](docs/Api/FakeApi.md#fakeouterbooleanserialize) | **POST** /fake/outer/boolean | 
 *FakeApi* | [**fakeOuterCompositeSerialize**](docs/Api/FakeApi.md#fakeoutercompositeserialize) | **POST** /fake/outer/composite | 
 *FakeApi* | [**fakeOuterNumberSerialize**](docs/Api/FakeApi.md#fakeouternumberserialize) | **POST** /fake/outer/number | 

samples/client/petstore/php/SwaggerClient-php/docs/Api/DefaultApi.md

@@ -0,0 +1,57 @@
+# Swagger\Client\DefaultApi
+
+All URIs are relative to *http://petstore.swagger.io:80/v2*
+
+Method | HTTP request | Description
+------------- | ------------- | -------------
+[**testBodyWithQueryParams**](DefaultApi.md#testBodyWithQueryParams) | **PUT** /fake/body-with-query-params | 
+
+
+# **testBodyWithQueryParams**
+> testBodyWithQueryParams($body, $query)
+
+
+
+### Example
+```php
+<?php
+require_once(__DIR__ . '/vendor/autoload.php');
+
+$apiInstance = new Swagger\Client\Api\DefaultApi(
+    // If you want use custom http client, pass your client which implements `GuzzleHttp\ClientInterface`.
+    // This is optional, `GuzzleHttp\Client` will be used as default.
+    new GuzzleHttp\Client()
+);
+$body = new \Swagger\Client\Model\User(); // \Swagger\Client\Model\User | 
+$query = "query_example"; // string | 
+
+try {
+    $apiInstance->testBodyWithQueryParams($body, $query);
+} catch (Exception $e) {
+    echo 'Exception when calling DefaultApi->testBodyWithQueryParams: ', $e->getMessage(), PHP_EOL;
+}
+?>
+```
+
+### Parameters
+
+Name | Type | Description  | Notes
+------------- | ------------- | ------------- | -------------
+ **body** | [**\Swagger\Client\Model\User**](../Model/User.md)|  |
+ **query** | **string**|  |
+
+### Return type
+
+void (empty response body)
+
+### Authorization
+
+No authorization required
+
+### HTTP request headers
+
+ - **Content-Type**: application/json
+ - **Accept**: Not defined
+
+[[Back to top]](#) [[Back to API list]](../../README.md#documentation-for-api-endpoints) [[Back to Model list]](../../README.md#documentation-for-models) [[Back to README]](../../README.md)
+