标题图像会根据季节自动更改

几天来一直在试图找出脚本的错误。作为使用“primer”的主题。重点是使标题图像在每个季节都会自行改变。在页面标题处显示fall 就是这样，即使我测试不同季节的不同月份，也不会发生任何事情。也许有人能帮我解决这个问题。

功能

    add_filter(\'masthead\',\'site-header\');
function seasonal_site_header ($classes = \'\') {
   $hemisphere = \'northern\';
   $m = date(\'m\');
    
   $northern=array(
     \'summer\' => array(6, 7, 8),
     \'fall\' => array(9, 10, 11),
     \'winter\' => array(12, 1, 2),
     \'spring\' => array(3, 4, 5)
   );

   foreach($$hemisphere as $key=>$val) {
     if(in_array($m, $val)) {
       $classes[] = $key;
       return $classes;
     }
   }
   $classes[] = \'\';
   return $classes;
}

css

#masthead, .site-header, .winter
{
  background-image: url(\'/wp-content/uploads/2020/09/winter.jpg\');

}
#masthead, .site-header, .spring
{
  background-image: url(\'/wp-content/uploads/2020/09/spring.jpeg\');

}
#masthead, .site-header, .summer #site-header-wrapper
{
  background-image: url(\'/wp-content/uploads/2020/09/summer.jpeg\');

}
#masthead, .site-header, .fall
{
  background-image: url(\'/wp-content/uploads/2020/09/autumn.jpg\');

}

add_filter(\'masthead\',\'seasonal_site_header\', 10, 2); function seasonal_site_header ($classes = \'\') { $hemisphere = \'northern\'; $m = date(\'m\'); $northern=array( \'summer\' => array(6, 7, 8), \'fall\' => array(9, 10, 11), \'winter\' => array(12, 1, 2), \'spring\' => array(3, 4, 5) ); foreach($$hemisphere as $key=>$val) { if(in_array($m, $val)) { $classes[] = $key; return $classes; } } return $classes; }

#masthead.site-header.winter { background-image: url(\'/wp-content/uploads/2020/09/winter.jpg\'); } #masthead.site-header.spring { background-image: url(\'/wp-content/uploads/2020/09/spring.jpeg\'); } #masthead.site-header.summer { background-image: url(\'/wp-content/uploads/2020/09/summer.jpeg\'); } #masthead.site-header.fall { background-image: url(\'/wp-content/uploads/2020/09/autumn.jpg\'); }

使用插件更改CSS

我正在尝试制作一个插件来更改CSS文件。我的客户希望每个季节都改变颜色，我们希望做到万无一失，这样他们就不会破坏任何东西。我已经创建了选项页面，但似乎无法使实际功能正常工作。<?php class SeizoensKleuren { private $seizoens_kleuren_options; public function __construct() { add_action( \'admin_menu\', arr

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使用插件更改CSS