修改fetch的获取方式

extend/base/common/provider/ViewBase.php

@@ -61,7 +61,7 @@ class ViewBase extends ThinkView
         return $this->config([
             'view_suffix' => 'html',
         ])->getContent(function () use ($vars, $template) {
-            $this->engine()->fetch($template, array_merge($this->data, $vars));
+            return $this->engine()->fetch($template, array_merge($this->data, $vars));
         });
     }
 
@@ -77,7 +77,30 @@ class ViewBase extends ThinkView
         return $this->config([
             'view_suffix' => 'js',
         ])->getContent(function () use ($vars, $template) {
-            $this->engine()->fetch($template, array_merge($this->data, $vars));
+            return $this->engine()->fetch($template, array_merge($this->data, $vars));
         });
     }
+
+        /**
+     * 获取模板引擎渲染内容.
+     * @param $callback
+     * @return string
+     * @throws \Exception
+     */
+    protected function getContent($callback): string
+    {
+        // 渲染输出
+        try {
+            $content = $callback();
+        } catch (\Exception $e) {
+            ob_end_clean();
+            throw $e;
+        }
+
+        if ($this->filter) {
+            $content = call_user_func_array($this->filter, [$content]);
+        }
+
+        return $content;
+    }
 }

extend/think/Template.php

@@ -210,9 +210,9 @@ class Template
      * 渲染模板文件.
      * @param  string $template 模板文件
      * @param  array  $vars 模板变量
-     * @return void
+     * @return string
      */
-    public function fetch(string $template, array $vars = []): void
+    public function fetch(string $template, array $vars = []): string
     {
         if ($vars) {
             $this->data = array_merge($this->data, $vars);
@@ -220,9 +220,7 @@ class Template
 
         if ($this->isCache($this->config['cache_id'])) {
             // 读取渲染缓存
-            echo $this->cache->get($this->config['cache_id']);
-
-            return;
+            return $this->cache->get($this->config['cache_id']);
         }
 
         $template = $this->parseTemplateFile($template);
@@ -251,7 +249,7 @@ class Template
                 $this->cache->set($this->config['cache_id'], $content, $this->config['cache_time']);
             }
 
-            echo $content;
+            return $content;
         }
     }
 

extend/think/view/driver/Think.php

@@ -97,9 +97,9 @@ class Think
      * 渲染模板文件.
      * @param  string $template 模板文件
      * @param  array  $data 模板变量
-     * @return void
+     * @return string
      */
-    public function fetch(string $template, array $data = []): void
+    public function fetch(string $template, array $data = []): string
     {
         if ('' == pathinfo($template, PATHINFO_EXTENSION)) {
             // 获取模板文件名
@@ -111,7 +111,7 @@ class Think
             throw new TemplateNotFoundException('template not exists:' . $template, $template);
         }
 
-        $this->template->fetch($template, $data);
+        return $this->template->fetch($template, $data);
     }
 
     /**