博主的wordpress一直都跟随官方推送的更新，一般只要提示了就会点更新，这么多年也从来没有出现更挂了的情况，但是最近更新后，管理后台赫然弹出了PHP7.4已过期的，最低满足要求版本为PHP8.3的警告提示，于是强迫症发作，升级了一波，果然升级后访问页面直接出现了PHP崩溃的情况，特此记录下一些处理方法。
首先，既然官方提示了升级警告，那自然表明wordpress本身代码是都可以兼容8.3版本的PHP的，问题基本都出在各种常年没人维护的插件上，首先第一个：
[Fri Jul 11 16:20:57.973316 2025] [proxy_fcgi:error] [pid 19955:tid 20046] [client 85.208.96.204:23228] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function create_function() in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php:189\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-settings.php(545): include_once()\n#1 /var/www/vhosts/blog.k-res.net/wp-config.php(73): require_once('...')\n#2 /var/www/vhosts/blog.k-res.net/wp-load.php(50): require_once('...')\n#3 /var/www/vhosts/blog.k-res.net/wp-blog-header.php(13): require_once('...')\n#4 /var/www/vhosts/blog.k-res.net/index.php(17): require('...')\n#5 {main}\n thrown in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php on line 189'
[Fri Jul 11 16:21:22.922529 2025] [proxy_fcgi:error] [pid 19956:tid 20045] [client 66.249.68.38:61524] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function create_function() in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php:189\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-settings.php(545): include_once()\n#1 /var/www/vhosts/blog.k-res.net/wp-config.php(73): require_once('...')\n#2 /var/www/vhosts/blog.k-res.net/wp-load.php(50): require_once('...')\n#3 /var/www/vhosts/blog.k-res.net/wp-blog-header.php(13): require_once('...')\n#4 /var/www/vhosts/blog.k-res.net/index.php(17): require('...')\n#5 {main}\n thrown in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php on line 189'
[Fri Jul 11 16:21:52.750113 2025] [proxy_fcgi:error] [pid 19955:tid 20013] [client 49.232.55.15:43176] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function create_function() in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php:189\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-settings.php(545): include_once()\n#1 /var/www/vhosts/blog.k-res.net/wp-config.php(73): require_once('...')\n#2 /var/www/vhosts/blog.k-res.net/wp-load.php(50): require_once('...')\n#3 /var/www/vhosts/blog.k-res.net/wp-blog-header.php(13): require_once('...')\n#4 /var/www/vhosts/blog.k-res.net/index.php(17): require('...')\n#5 {main}\n thrown in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php on line 189'
[Fri Jul 11 16:21:52.750983 2025] [proxy_fcgi:error] [pid 19956:tid 20010] [client 49.232.55.15:43192] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught Error: Call to undefined function create_function() in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php:189\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-settings.php(545): include_once()\n#1 /var/www/vhosts/blog.k-res.net/wp-config.php(73): require_once('...')\n#2 /var/www/vhosts/blog.k-res.net/wp-load.php(50): require_once('...')\n#3 /var/www/vhosts/blog.k-res.net/wp-blog-header.php(13): require_once('...')\n#4 /var/www/vhosts/blog.k-res.net/index.php(17): require('...')\n#5 {main}\n thrown in /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php on line 189'
简单看了下调用栈，发现果然是某个“古早”插件：“custom-iframe-widget”的问题，查了下报错异常“Call to undefined function create_function()”，就是8.3中废弃的函数，要换成匿名函数实现，于是小改了一下：
181 function custom_parse_iframe_widget($text)
182 {
183 return preg_replace_callback("@(?:<p>\s*)?\[ShaktiIFrame\s*(.*?)\](?:\s*</p>)?@", 'shakti_iframe_replace', $text);
184 }
185
186 add_filter('the_content', 'custom_parse_iframe_widget');
187 add_filter('the_excerpt', 'custom_parse_iframe_widget');
188 $new_func = function() {register_widget("Custom_IFrame_Widget");};
189 //add_action( 'widgets_init', create_function( '', 'register_widget("Custom_IFrame_Widget");' ) );
190 add_action( 'widgets_init', $new_func );
191 ?>
结果，又报了新的错误：
[Fri Jul 11 16:28:48.619300 2025] [proxy_fcgi:error] [pid 19956:tid 19995] [remote 218.69.109.82:3061] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget-factory.php on line 62 and at least 2 expected in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget.php:163\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget-factory.php(62): WP_Widget->__construct()\n#1 /var/www/vhosts/blog.k-res.net/wp-includes/widgets.php(123): WP_Widget_Factory->register()\n#2 /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php(189): register_widget()\n#3 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(324): {closure}()\n#4 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#5 /var/www/vhosts/blog.k-res.net/wp-includes/plugin.php(517): WP_Hook->do_action()\n#6 /var/www/vhosts/blog.k-res.net/wp-includes/widgets.php(1870): do_action()\n#7 /var/www/vhosts/blog.k-res.net/wp...'
[Fri Jul 11 16:28:50.837111 2025] [proxy_fcgi:error] [pid 19956:tid 19959] [remote 218.69.109.82:3061] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget-factory.php on line 62 and at least 2 expected in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget.php:163\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget-factory.php(62): WP_Widget->__construct()\n#1 /var/www/vhosts/blog.k-res.net/wp-includes/widgets.php(123): WP_Widget_Factory->register()\n#2 /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php(189): register_widget()\n#3 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(324): {closure}()\n#4 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#5 /var/www/vhosts/blog.k-res.net/wp-includes/plugin.php(517): WP_Hook->do_action()\n#6 /var/www/vhosts/blog.k-res.net/wp-includes/widgets.php(1870): do_action()\n#7 /var/www/vhosts/blog.k-res.net/wp...'
[Fri Jul 11 16:28:52.378850 2025] [proxy_fcgi:error] [pid 19956:tid 19961] [remote 218.69.109.82:3061] AH01071: Got error 'PHP message: PHP Fatal error: Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct(), 0 passed in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget-factory.php on line 62 and at least 2 expected in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget.php:163\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-widget-factory.php(62): WP_Widget->__construct()\n#1 /var/www/vhosts/blog.k-res.net/wp-includes/widgets.php(123): WP_Widget_Factory->register()\n#2 /var/www/vhosts/blog.k-res.net/wp-content/plugins/custom-iframe-widget/custom-iframe-widget.php(189): register_widget()\n#3 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(324): {closure}()\n#4 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#5 /var/www/vhosts/blog.k-res.net/wp-includes/plugin.php(517): WP_Hook->do_action()\n#6 /var/www/vhosts/blog.k-res.net/wp-includes/widgets.php(1870): do_action()\n#7 /var/www/vhosts/blog.k-res.net/wp...'
“Uncaught ArgumentCountError: Too few arguments to function WP_Widget::__construct”，这个简单查了下，发现是构造时参数数量不匹配，PHP8.3对这方面的要求更加严格了，简单读了下代码，发现有点复杂，又看了下这个插件的信息：
Custom IFrame Widget
启用 | 删除
A Custom IFrame Widget, Short Code for Page,Post: [ShaktiIFrame url 650px 200px]
1.1 版本 | 作者：Shakti Kumar | 查看详情
已经14年没有更新了，印象中也没有用这个小工具的地方，于是最终放弃修改代码，直接删除了这个widget。
处理好后，再次刷新页面，还是crash，查看log：
[Fri Jul 11 16:25:42.886121 2025] [proxy_fcgi:error] [pid 19956:tid 19984] [remote 218.69.109.82:2980] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
[Fri Jul 11 16:25:44.268693 2025] [proxy_fcgi:error] [pid 19956:tid 19985] [remote 103.107.219.218:39763] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
[Fri Jul 11 16:25:44.518528 2025] [proxy_fcgi:error] [pid 19956:tid 20045] [client 103.107.219.235:14593] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
[Fri Jul 11 16:25:45.319044 2025] [proxy_fcgi:error] [pid 19956:tid 19987] [remote 218.69.109.82:2980] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
[Fri Jul 11 16:25:47.982762 2025] [proxy_fcgi:error] [pid 19956:tid 19992] [remote 103.167.26.12:21088] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
[Fri Jul 11 16:25:52.036035 2025] [proxy_fcgi:error] [pid 19955:tid 19981] [remote 218.69.109.82:2984] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
[Fri Jul 11 16:26:04.887852 2025] [proxy_fcgi:error] [pid 19956:tid 19994] [remote 218.69.109.82:2987] AH01071: Got error 'PHP message: PHP Fatal error: Unparenthesized `a ? b : c ? d : e` is not supported. Use either `(a ? b : c) ? d : e` or `a ? b : (c ? d : e)` in /var/www/vhosts/blog.k-res.net/wp-content/plugins/wp-category-tag-could/classes/wpctc-widget.php on line 224'
发现是wp-category-tag-could这个小工具的错，报错代码是一个多级嵌套的问号表达式，显然8.3对这种骚代码的歧义性要求更严格了，按直接右边优先，修改一下：
201 $includeTags = '';
202 if (count($tags) > 0) {
203 foreach ($tags as $tag) {
204 if ($instance['taxonomy'] == 'post_tag' && count($instance['tag_id']) > 0 && !in_array($tag->tag_id, $instance['tag_id'])) {
205 continue;
206 }
207 if (isset($instance[$instance['taxonomy'] . '_id'])
208 && count($instance[$instance['taxonomy'] . '_id']) > 0
209 && !in_array($tag->tag_id, $instance[$instance['taxonomy'] . '_id'])
210 ) {
211 continue;
212 }
213 if (!in_array($tag->tag_id, $exclude)) {
214 $includeTags = $tag->tag_id . ',' . $includeTags;
215 }
216 }
217 }
218
219 $cloud_args = array(
220 'smallest' => $instance['format'] == 'price' ? '100' : $instance['smallest'],
221 'largest' => $instance['format'] == 'price' ? '100' : $instance['largest'],
222 'unit' => '%',
223 'number' => $instance['number'],
224 //'format' => $instance['format'] == 'price' ? 'flat' : $instance['format'] == 'bars' ? 'list' : $instance['format'] == 'rounded' ? 'list' : $instance['format'],
224 'format' => $instance['format'] == 'price' ? 'flat' : ($instance['format'] == 'bars' ? 'list' : ($instance['format'] == 'rounded' ? 'list' : $instance['format'])),
225 'orderby' => $instance['order_by'],
226 'order' => $instance['order'],
227 'include' => null,
228 'link' => 'view',
229 'taxonomy' => $instance['taxonomy'],
230 'echo' => $instance['format'] != 'array',
231 );
232 if (strlen($includeTags > 0)) {
233 $cloud_args['include'] = $includeTags;
234 }
235 ?>
刷新请求，迎来下一个异常：
[Fri Jul 11 16:41:18.850168 2025] [proxy_fcgi:error] [pid 19956:tid 19992] [remote 218.69.109.82:3731] AH01071: Got error 'PHP message: PHP Warning: Undefined variable $content in /var/www/vhosts/blog.k-res.net/wp-content/plugins/rejected-wp-keyword-link-rejected/wp_keywordlink.php on line 321; PHP message: PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method CustomPostOrder::CustomPostOrder_options() cannot be called statically in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php:324\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#1 /var/www/vhosts/blog.k-res.net/wp-includes/plugin.php(517): WP_Hook->do_action()\n#2 /var/www/vhosts/blog.k-res.net/wp-admin/includes/menu.php(161): do_action()\n#3 /var/www/vhosts/blog.k-res.net/wp-admin/menu.php(423): require_once('...')\n#4 /var/www/vhosts/blog.k-res.net/wp-admin/admin.php(159): require('...')\n#5 /var/www/vhosts/blog.k-res.net/wp-admin/index.php(10): require_once('...')\n#6 {main}\n thrown in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php on line 324'
[Fri Jul 11 16:41:45.121753 2025] [proxy_fcgi:error] [pid 19956:tid 19994] [remote 218.69.109.82:3748] AH01071: Got error 'PHP message: PHP Warning: Undefined variable $content in /var/www/vhosts/blog.k-res.net/wp-content/plugins/rejected-wp-keyword-link-rejected/wp_keywordlink.php on line 321; PHP message: PHP Fatal error: Uncaught TypeError: call_user_func_array(): Argument #1 ($callback) must be a valid callback, non-static method CustomPostOrder::CustomPostOrder_options() cannot be called statically in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php:324\nStack trace:\n#0 /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()\n#1 /var/www/vhosts/blog.k-res.net/wp-includes/plugin.php(517): WP_Hook->do_action()\n#2 /var/www/vhosts/blog.k-res.net/wp-admin/includes/menu.php(161): do_action()\n#3 /var/www/vhosts/blog.k-res.net/wp-admin/menu.php(423): require_once('...')\n#4 /var/www/vhosts/blog.k-res.net/wp-admin/admin.php(159): require('...')\n#5 /var/www/vhosts/blog.k-res.net/wp-admin/index.php(10): require_once('...')\n#6 {main}\n thrown in /var/www/vhosts/blog.k-res.net/wp-includes/class-wp-hook.php on line 324'
这个异常都直接写明是哪个插件了：CustomPostOrder，哈哈。看了下代码，原来是8.3对回调函数的要求也更加严格了，CustomPostOrder::CustomPostOrder_options是个实例函数，所以不能作为回调函数使用，随后看了下CustomPostOrder的这个实例函数，发现里面根本没有访问成员的处理，于是直接加了个static：
48 /**
49 * Creation of the Custom Post Order
50 * This class should host all the functionality that the plugin requires.
51 */
52 /*
53 * first get the options necessary to properly display the plugin
54 */
55
56
57
58 if ( !class_exists( "CustomPostOrder" ) ) {
59 add_action ( 'admin_menu', array ( 'CustomPostOrder', 'CustomPostOrder_options' ) );
60 global $post;
61
62 class CustomPostOrder {
63
64 /**
65 * Global Class Variables
66 */
67
68
69 var $optionsName = "CustomPostOrderOptions";
70 var $version = "1.1";
71
72
73
74 /**
75 * CustomPostOrder plugin options page
76 */
77 static function CustomPostOrder_options ( ) {
78 if ( function_exists ( 'add_management_page' ) )
79 {
80 add_options_page( 'Custom Post Order', 'Custom Post Order', 9,
81 dirname ( __FILE__ ) .'/custom-post-order-adminfunctions.php' );
82 }
83 }
84
85 function custom_posts_order( $orderby )
86 {
87 $category_checked = false;
88 $settings = get_option ( "CustomPostOrder-settings" );
89 $cats = $settings['applyArray'];
90 if ( $settings['applyTo'] == 'all')
91 return $settings['orderElement']." ".$settings['orderType'];
92 else {
93 foreach ( $cats as $cat ):
94 if ( is_category ( $cat ) ) {
95 $category_checked = true;
96 break;
97 }
98 endforeach;
99 if ( $category_checked ) {
100 return $settings['orderElement']." ".$settings['orderType'];
101 }
102 else
77行，修改后再次刷新，熟悉的wp页面终于又回来了。
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