添加css延迟加载，html精简

application/third_party/htmlcompressor/controllers/index.php

@@ -79,16 +79,22 @@ class Index extends CI_Controller {
                 return FALSE;
             }
 
-            //把精简的css添加到head后面
-            $html_object = str_replace('</title>', '</title><style type="text/css">' . $optimize_css . "</style>", $html_object);
+            //把精简的css添加到head前面
+            $html_object = str_replace('</head>', '<style type="text/css">' . $optimize_css . "</style></head>", $html_object);
+            //删除多余空格和换行符
+            $html_object = str_replace(array("    ", "\t", "\n", "\r"), " ", $html_object);
+            //循环n次，把双空格替换为一个空格
+            for ($i = 0; $i <= 4; $i++) {
+                $html_object = str_replace("  ", " ", $html_object);
+            }
 
 //在最后加载原始css文件和js文件
-            $lastload_js = '<script>';
-            //把css移动到页面底部
+            //把css移动到页面底部，延迟加载
+            $lastload_js = '<script>setTimeout(function(){';
             foreach ($link_css_array as $item) {
                 $lastload_js.='var elem=document.createElement("link");elem.rel="stylesheet";elem.type="text/css";elem.href="' . $item . '";document.body.appendChild(elem);';
             }
-            $lastload_js.='</script>';
+            $lastload_js.='},1000);</script>';
             //把js移动到页面底部
             foreach ($link_js_array as $item) {
                 $lastload_js.='<script src="' . $item . '"></script>';