Enews主题PHP7报错修改

Warning:  Use of undefined constant themedefault - assumed 'themedefault' (this will throw an Error in a future version of PHP) 
in wp-content\themes\Enews\admin\e-admin.php on line 220
 selected='selected'>默认

原文：
<option value ="themedefault" <?php selected( $theme_skin, themedefault); ?>>默认</option>
<option value ="green" <?php selected( $theme_skin, green); ?> style=" background-color:f15620">绿色</option>
<option value ="orange" <?php selected( $theme_skin, orange); ?> style=" background-color:a6c21f">橙色</option>
<option value ="red" <?php selected( $theme_skin, red); ?> style=" background-color:af0000">红色</option>
<option value ="purple" <?php selected( $theme_skin, purple); ?> style=" background-color:b96bf0">紫色</option>
修改为：
<option value ="themedefault" <?php selected( $theme_skin, 'themedefault'); ?>>默认</option>
<option value ="green" <?php selected( $theme_skin, 'green'); ?> style=" background-color:f15620">绿色</option>
<option value ="orange" <?php selected( $theme_skin, 'orange'); ?> style=" background-color:a6c21f">橙色</option>
<option value ="red" <?php selected( $theme_skin, 'red'); ?> style=" background-color:af0000">红色</option>
<option value ="purple" <?php selected( $theme_skin, 'purple'); ?> style=" background-color:b96bf0">紫色</option>


Warning: Use of undefined constant 上页 - assumed '上页' (this will throw an Error in a future version of PHP) in F:\laragon\www\wordpress\wp-content\themes\Enews\functions.php on line 155
Warning: Use of undefined constant 下页 - assumed '下页' (this will throw an Error in a future version of PHP) in F:\laragon\www\wordpress\wp-content\themes\Enews\functions.php on line 156
原文：
'prev_text'          =>上页,
'next_text'          =>下页,
改为：
'prev_text'          =>'上页',
'next_text'          =>'下页',