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：
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