crayon-systax-highlighter在php7.2版本以上报错：Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4

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问题

升级php环境后，wordpress代码高亮插件crayon-systax-highlighter报如下错误：

1	Warning: preg_replace(): Compilation failed: invalid range in character class at offset 4 in /wp-content/plugins/crayon-syntax-highlighter/crayon_langs.class.php on line 340

1 2	修改前：return preg_replace('/[^\w-+#]/msi', '', $id); 修改后：return preg_replace('/[^\w\-+#]/msi', '', $id);